Author Topic: Steering wheel vibration  (Read 19906 times)

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Offline wim_vg

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Steering wheel vibration
« on: October 02, 2017, 19:31:55 PM »
Hi all,

Been some time since I posted anything... sorry for that.

I've been working on my Calibra due to feeling vibration on the steering wheel. Well, I call it vibration, but it really is that I feel every small pit in the road... and it pulls on the wheel.

What's been recently changed: tie rods, tie rod ends, drop links, lower arms (all on both sides). Thought that all parts were of good quality (German brands like Meyle and Lemförder).

The shocks and top mounts are still fine I think... recovers really well after any road change, no visible leaks, no noises and passes MOT each time.

Pretty much out of options? Any further advice welcome as always to keep my Cali running :)

Cheers

Offline tristandimond

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Re: Steering wheel vibration
« Reply #1 on: October 02, 2017, 20:38:04 PM »
Does it get more noticeable when you brake?
If so it could be warped discs.
Common problem with aftermarket discs.
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Offline wim_vg

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Re: Steering wheel vibration
« Reply #2 on: October 02, 2017, 21:29:42 PM »
Hmm I will try to pay some attention to braking.
I think the discs are still original and have quite some wear to it.

Would that relate to feeling each and every pothole while driving (not braking) though?

Offline tristandimond

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Re: Steering wheel vibration
« Reply #3 on: October 02, 2017, 23:08:07 PM »
When the disks get thin they can start to warp a bit.
I wouldn't have thought it would affect the road feeling though.
not sure what else to suggest  :-\
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Offline wim_vg

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Re: Steering wheel vibration
« Reply #4 on: October 02, 2017, 23:13:23 PM »
Ok no worries... I'm also thinking of getting another alignment done. Will report back.

Offline zodiac245

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Re: Steering wheel vibration
« Reply #5 on: October 03, 2017, 09:35:18 AM »
I had issues with vibration under braking (worse at low speeds) until I found and replaced a cracked ABS sensor ring. Worth checking...

Offline tristandimond

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Re: Steering wheel vibration
« Reply #6 on: October 03, 2017, 10:35:22 AM »
You can try jacking the front end up and checking for play in the steering or wheel bearing by rocking the wheels left to right and top to bottom.
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Offline wim_vg

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Re: Steering wheel vibration
« Reply #7 on: October 05, 2017, 17:58:56 PM »
Hi, thanks. I did this the other day and could not feel any play... neither any noise from the bearings while spinning the wheels.

Could this come from tramlining?

Offline tristandimond

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Re: Steering wheel vibration
« Reply #8 on: October 05, 2017, 18:12:36 PM »
Not sure, iv never noticed anything like it on mine. :-\
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Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #9 on: October 06, 2017, 19:26:33 PM »
Hi guys

Been thinking......I would remove both front wheels and check the tyre side walls for a possible bulge....even the smallest abnormality can transmit through up to the steering wheel.

If the tyres pass.... then I would start with the lower arms and bushes etc  and carefully inspect components right up to the top suspension......even double checking the items that have been worked on and replaced.

Hope you find the culprit soon

Offline wim_vg

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Re: Steering wheel vibration
« Reply #10 on: October 06, 2017, 21:31:59 PM »
Thanks all. I have replaced the drop links with other ones (the other new ones didn't go on well), but to no avail...

I think the bushings of the lowers arms near the wheel hubs are gone. The rubber protection of the ball joint looks to have a hole.

I also started hearing a rumbling noise from the front right side... think the bearings are buggered too...

It will go to the garage for a full check, then go for an alignment... will report back!

Offline wim_vg

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Re: Steering wheel vibration
« Reply #11 on: October 14, 2017, 10:41:31 AM »
Hi all, did not yet manage to get the car to the shop for a check.

Did have some time to disconnect the lower arm bushings (balljoint) near the wheel hub. The rubber on these is pretty 'flat' and think the grease must be gone. The balljoints feel really stiff.

I suppose this being too stiff transfers the road vibrations directly to the steering wheel, right?

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #12 on: October 14, 2017, 18:42:19 PM »
Yeah right

It's a bit like that kids song.........."Your knee bone is connected to your thigh bone....etc etc. Well done for your investigation thus far 8)

Keep us informed because your findings and cure can help other members if and when they get similar problems. Thankyou  :)


Offline tristandimond

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Re: Steering wheel vibration
« Reply #13 on: October 14, 2017, 23:56:28 PM »
Hi all, did not yet manage to get the car to the shop for a check.

Did have some time to disconnect the lower arm bushings (balljoint) near the wheel hub. The rubber on these is pretty 'flat' and think the grease must be gone. The balljoints feel really stiff.

I suppose this being too stiff transfers the road vibrations directly to the steering wheel, right?
Sound like this could be your problem, if the grease has gone it wont be long before the joints will be gone so if you can get some grease in them then it should at least make a difference to your problem.
They may be 'greased for life' ones which just means you cant re-grease them and have to buy new ones  >:(  - More money for the part manufacturers lol
1998 Cally 16v SE8 (daily)
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Offline wim_vg

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Re: Steering wheel vibration
« Reply #14 on: November 13, 2017, 20:34:35 PM »
Hi all,

went to checking out the lower arm balljoints. They both had a cracked rubber seal and felt really tough to move. Drilled out the M10 rivets and replaced the balljoint. My ride feels a lot smoother now and the small bumps are gone!
There's still a slight unbalance somewhere, which I think might be down to alignment... will get that done too sometime later.

Offline tristandimond

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Re: Steering wheel vibration
« Reply #15 on: November 13, 2017, 23:53:47 PM »
I need to get my wheels balanced...
its just getting round to it   ;)
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Offline wim_vg

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Re: Steering wheel vibration
« Reply #16 on: November 21, 2017, 23:07:55 PM »
Have a quick question: how badly does a slight misalignment still cause a steering wobble/pull when driving over potholes?

I hear a slight rattle from the suspension... worn shocks play a role?

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #17 on: November 24, 2017, 02:17:09 AM »
Surprisingly a lot

Once the geometry is effected problems like noise....poor ride quality will be amplified several fold.......if it is so bad as to feel bumps ..etc through the steering wheel and components it will only get worse when driving faster

You also have the what I call the "Aggro" syndrome.....i.e....the more you become aware of it the more it annoys the brain.

Not forgetting the damn wallet and the Piggy Bank.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #18 on: December 18, 2017, 23:23:52 PM »
Had the alignment done but unfortunately it is still there...

Here is a list of things changed: tie rods, tie rod ends, lower arm ball joints and arb drop links.
Drop links were of type MOOG, the rest of type Meyle/Lemförder.

Still got me scratching my head...

Could it be some steering wheel play?
Having a slight doubt about the MOOG parts... though should I feel that also when cornering (which is fine)?

I noticed the shop took the alignment setup of a C25XE, not C20NE... does that play a role?

Cheers...

Offline wim_vg

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Re: Steering wheel vibration
« Reply #19 on: May 26, 2018, 09:34:41 AM »
Hi all,

Recently got my front wheel with new tyres, wheels rebalanced and re-aligned for a second time, but to no avail...

This is what I'm seeing when the wheels are slightly off the ground:

http://www.icone-music.be/files/Calibra/FrontLeftWheel.mp4
http://www.icone-music.be/files/Calibra/FrontRightWheel.mp4

Not sure what I need to think of this... Probably wheels are not round (?) but VERY hard to see anything on the metal rims by eye... Or could this be created by something else?

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #20 on: May 26, 2018, 11:00:05 AM »
This must be sending you up the wall.  >:(

The cost goes up and up and you just seam to be chucking money at it.........but sadly this will continue .......unless someone can pinpoint the problem.

There are only two possibilities I can offer but it is only a guess.............One is perhaps wheel bearing damage or collapse.............or Two

The drive shafts have bent out of true and are not straight.......with the amount of potholes we have to drive over each year it is these items i.e.

Suspension, ball joints, lower arms, wheel bearings that take a battering.


Finally if the wheel bearings and drive shafts ar ruled out then the problem could be down to ...the wheel hubs .......I say this because your video

Shows a definite uneven rotation.......could also be as you mentioned the wheels are not geometricaly round.

From your video evidence I hope you solve this agrivating problem......Good Luck.

I forgot to also check the Cv joints both sides.


Offline wim_vg

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Re: Steering wheel vibration
« Reply #21 on: May 26, 2018, 13:21:14 PM »
Yeah it is darn frustrating!

Besides looking at how the wheels spin, are there any other telltale signs of either bearing or drive shaft failures?

My gut tells me to look at the bearings since the wheel also feels shimmy when driving uneven roads...

I have new bearings and drive shafts on order, going to look for seombody that can fit them now :)

Offline wim_vg

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Re: Steering wheel vibration
« Reply #22 on: May 26, 2018, 13:32:18 PM »
Ah forgot to mention: when I let the car slide down the driveway without the engine started, or press the clutch during driving, the steering wheel shimminess remains... not sure if that reinforces my gut feeling its more related to the bearings.

The car has always vibrated a little on its own on idle which was very bearable... I did pointed that more towards some play or so in the driveshafts.

Offline electric geen

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Re: Steering wheel vibration
« Reply #23 on: May 27, 2018, 11:36:34 AM »
Swap the wheel around for a back one to see if it is buckled. I had an Alfa where the po had kerbed it at speed, the bearing did collapse and I had to change it. I think the driveshafts have balance weights/dampers from factory, see if they are missing. Check that the disc is true and not corroded to bits and unbalanced. Its a rotational thing causing the vibration, so it´s those parts that are suspect assuming no loose ball joints.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #24 on: May 27, 2018, 12:27:27 PM »
Cheers for the reply!

In fact I never saw any weights on the driveshafts with my 8v... would they have fallen off somewhere in the past?

the break discs are brand new... I don't see any visual offset on them while they are spinning. I swapped out the rims for another type and can see a slight difference, so I think some of it does relate to the rim itself.

On the ones in front, I can see a different motion between the two wheells. What's odd is that in the back I can see exactly the same... although switched per side. Say front left and right rear are pretty much the same... as are front right and rear left. I will try swapping out the left side front and back as well.

Will this sort of unbalance though also make the steering wheel much more sensitive on uneven roads?

Thanks again! Hope I'm getting closer...

Offline electric geen

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Re: Steering wheel vibration
« Reply #25 on: May 27, 2018, 13:26:43 PM »
If your getting bump steer on uneven roads, sure you haven´t kerbed it or dropped it in a pothole at speed?. I would get the measuring tape out and dial indicator find a flat floor and measure the lower wishbones on both sides looking out for twist, the early wishbones were weak. Also jack up the car and use a dial indicator for your rims, hub, and driveshaft before changing any parts. Crowbar all the joints to make sure no loose ball joints or bushes, and the nasty one to fix is the front sub frame mounting points, are they tight? If your removing the drive shafts take the opportunity to inspect the top mounts and top bearing, check the backlash in the steering rack too.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #26 on: May 27, 2018, 16:07:35 PM »
Cheers for the further advice!

Lower arms are pretty new actually... as well are tie rods and ends. Problem unfortunately was already there before. There was some up/down play in the rack so I also replaced it with a second hand which was still in good condition (without up/down play). Any small movement I do with the wheel I can see directly being captured by the wheels, so I don't think it's the rack...

So I'm pretty confident it's not any joints...

Will double-check front subframe bolts as well, cheers.

What would be a good dial indicator tool? Agree this would be helpful.

Offline electric geen

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Re: Steering wheel vibration
« Reply #27 on: May 27, 2018, 18:40:51 PM »
Dial indicators off evil bay or local independent good tool and machine shop or machine mart. need one with a least 1/2 inch (12mm) 1 thou (0.01mm) with a magnetic base  (or make one ) Their all fairly cheap and you can use them for everything including timing belt TDC. If you have a separate driveshaft bearing on the long driveshaft bolted to the back of the engine, check that. There should be near zero run out on a drive shaft, hub and brake disc. Check the bearing play in the hub and gearbox ends. Find something before you throw money at it !!

Make sure to check the hub side to side and the vertical to make sure it hasn't gone buckled. Wheels standard or aftermarket? aftermarket ones may all be completely shot unless top quality.

Finally look for creases, new paint in the front sub frame if the po has driven over a traffic island.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #28 on: May 27, 2018, 21:54:55 PM »
Thanks, will do!

I did try rocking the wheels around but could not get any play.m anywhere. The drive axle has a little play in it but it has pretty much always been there like this. The left qide drive shaft I can give it a slight back/forth movement as well. The right side also has a little play to the intermediate shaft.

Wheels are not originals, they are Ronal original GM/Opel 17" which came from a Corsa or so (ET44)... always drove pretty well.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #29 on: May 30, 2018, 19:51:50 PM »
Hi all,

So... just had my car checked by a friend working at an official dealer. He couldn't find any play in any joints, steering gear, bearings... also driveshafts had minimal play that couldn't cause this vibration.
He drove the car with me and was equally puzzled... told me the car still looked great for its age :)

We found one bolt on the steering gear mounting brackets that could be tightened a bit more. Drove it around, but no luck... judder is still there.
Have anyway ordered new mounting rubbers for the steering gear.

Grrr...

Offline wim_vg

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Re: Steering wheel vibration
« Reply #30 on: May 31, 2018, 22:35:40 PM »
Was thinking today... could it be bad shocks? Or shocks starting to go bad?

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #31 on: May 31, 2018, 23:28:50 PM »
The answer to that question is a possibly yes

As I advised previously........Any component that is linked to the road wheels is a suspect until they can be ruled out.

It is so annoying when you have to spend money to change parts on a hunch........only to discover that the problem persists.............als o the

parts you take off might still have some mechanical life still in them.  I would also advise you to chat with a few mechanics to see if they have

encountered  similar problems or know of a fix.

You will not be obligated to have them fix it....but some are a fountain of knowledge from years in the trade.

I am sorry I cannot think of a possible solution.........but I am sure someone in the garage community could have the answer.

I wish you well.......and you will get there at some point sooner or later

Good luck.



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Re: Steering wheel vibration
« Reply #32 on: June 01, 2018, 06:46:21 AM »
Cheers, appreciate that!!
Alright I will plan to get another opinion on this before changing anything else.

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Re: Steering wheel vibration
« Reply #33 on: June 23, 2018, 01:10:22 AM »
Hi wim,

Sorry to read of your issues  :(

I suggest you have your hubs checked for wear and out of round by a specialist.

Good luck

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Re: Steering wheel vibration
« Reply #34 on: September 23, 2018, 13:34:08 PM »
Got some progress finally... I think.

Loosened the ARB bushings quite a bit and this improved already. Still not fully solved but definitely more bearable.

My feeling now is that although there's no play or worn parts, suspension might simply be too stiff... going to check coils and shocks next.

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Re: Steering wheel vibration
« Reply #35 on: October 20, 2018, 20:15:26 PM »
OK so I do not find anything else. If any, the shudder happens when going over uneven roads - on flat roads nothing happens on the steering wheel. When the wheel hits a bump, it jerks the steering wheel.

On top of  that, the strut has been overhauled completely on both sides (new shocks, new coils, new bearings, new top mounts...)
Had another re-alignment check, but to no avail.

I'm really puzzled...

Quick question though: should there be any play in the top mount when the car is lifted from the ground?
I can feel this on both sides - its not there with my other Calibra (didn't check this one on the road yet).

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Re: Steering wheel vibration
« Reply #36 on: November 13, 2018, 17:22:08 PM »
OK so I do not find anything else. If any, the shudder happens when going over uneven roads - on flat roads nothing happens on the steering wheel. When the wheel hits a bump, it jerks the steering wheel.

On top of  that, the strut has been overhauled completely on both sides (new shocks, new coils, new bearings, new top mounts...)
Had another re-alignment check, but to no avail.

I'm really puzzled...

Quick question though: should there be any play in the top mount when the car is lifted from the ground?
I can feel this on both sides - its not there with my other Calibra (didn't check this one on the road yet).

Hi

The last part of your question reminded me of when I took my Cali for MOT..........The tester passed her but queried looseness as you described when the strut was lifted.  ::)

I then remembered that prior to the MOT.......I had turned the top mount that rests on the suspension turret upside down because they looked neater.Lol

When I asked the tester if this would mak a difference he said possibly.......so we fitted them the original way and he tested and said it was fixed.

I don't know if this has anything to do with your problem.......but goes to show how correct assembly is important.



Offline wim_vg

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Re: Steering wheel vibration
« Reply #37 on: November 13, 2018, 19:36:56 PM »
Thanks for the reply. Indeed there was a larger than usual gap between the top 'washer' and the car body. This was because of the new nut supplied with the shocks having a higher head. I refitted the old nuts and now that problem is solved!

Still having a steering wheel shimmy... :-(

Offline electric geen

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Re: Steering wheel vibration
« Reply #38 on: November 13, 2018, 20:27:55 PM »
"When the wheel hits a bump, it jerks the steering wheel." That is bump steer by any name you can put it. Something wrong with your geometry of your suspension either you have the wrong arms fitted or bent or your chassis has been hit (which I posted before about hitting traffic islands). You need to get the tape measure out and find a level place and then measure from the centerline to all points of your suspension and to the ground each side should be identical in height and length (fore and aft position of the wheels). Calibra front subframes do shear the mounting welded nut under the drivers foot well - check if you can move the front subframe around. The attachment points of the steering rack also crack and split causing movement and lastly the drivers foot well bulkhead metalwork also splits (at the brake pedal mounting I think) - carpet out job I think but ask first someone who has had these problems.

ET49 is the fitment for Calibras the ET44 may be OK but accentuating the problem. The videos of your tyres show a 5mm buckling, you are never going to get good handling with those wheels. Wheel alignment doesn't check if your chassis is twisted or your wheels are buckled.

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Re: Steering wheel vibration
« Reply #39 on: November 14, 2018, 10:50:04 AM »
"When the wheel hits a bump, it jerks the steering wheel." That is bump steer by any name you can put it. Something wrong with your geometry of your suspension either you have the wrong arms fitted or bent or your chassis has been hit (which I posted before about hitting traffic islands). You need to get the tape measure out and find a level place and then measure from the centerline to all points of your suspension and to the ground each side should be identical in height and length (fore and aft position of the wheels). Calibra front subframes do shear the mounting welded nut under the drivers foot well - check if you can move the front subframe around. The attachment points of the steering rack also crack and split causing movement and lastly the drivers foot well bulkhead metalwork also splits (at the brake pedal mounting I think) - carpet out job I think but ask first someone who has had these problems.

ET49 is the fitment for Calibras the ET44 may be OK but accentuating the problem. The videos of your tyres show a 5mm buckling, you are never going to get good handling with those wheels. Wheel alignment doesn't check if your chassis is twisted or your wheels are buckled.

Hi

Electric geen has made a good point regarding the geometry...i.e. Bent chassis .if this turns out to be the case .....this will cause big problems

to the correct running and can cause all sorts of Vibration....squeaks.... and strange noises so it is very important to rule this out.

We are all on a roller coaster ride with you........there can't be many more possibilities left  ::)

When we as owners modifie our cars we change peramertures that designe engineers have carefully inserted into the car to get the best and safest option available.

If done correctly...modifying .has it's benefits.......however done wrongly....i.e.....Lower ed susspention......differe nt wheel sizes and offsets etc can introduce negative results which change how our cars behave on the road.

A friend helped me do my first Clutch change with engine out.  On reassembly he used a large breaker bar to tighten the Subframe bolts and by overtightening he broke the welded captive subframe bolt which caused an agrivating rattle. ::)

I had to cut a hole in the near side footwell to get access  >:(..........the nut was re welded...and the fooking cut floor panel.  >:(

Sorry to digress...but just to show that small mistakes can have a big impact.

Fineally have you changed the Constant Velocity joints......some times a physical inspection does'nt identifi internal problems.  This happened to me when I removed the CV joint the center ball bearings etc made a dive for the concrete......So when I inspected the internal spiral ball bearing channels I could see gouged out grooves which were hampering the smooth travel of the ball bearings.

After re-mewing the CV joint complete.......result 8) no more noise.

Hope we sort your problem out soon m8 .......been having bad car dreams Lol.....the other night my cars complete suspension.......wheels. ..hubs

etc parted company........I hope it remains a dream Lol........Don't have nightmares  ::)

Offline wim_vg

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Re: Steering wheel vibration
« Reply #40 on: November 14, 2018, 20:58:23 PM »
Yeah no worries there, I appreciate all the help I can get to try and solve this!

I do not hear any strange noises or rattling... everything at least seems tight. I will do a more thorough inspection of the subframe and steering gear mounts and report back.

The issues I have date back from say a year or so, but I cannot pinpoint it to a serious hit or particular part replacement (lower arms, tie rods & ends, etc)... seems something that grew over time.
The strange thing is that some days it does better than others.

EDIT: what do you all think about this though?
http://www.icone-music.be/files/Calibra/Lenkgetriebe_Spiel.mp4

Offline electric geen

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Re: Steering wheel vibration
« Reply #41 on: November 15, 2018, 22:11:44 PM »
Just seen the video :o Very scary, that is the steering rack that should be bolted tight to the bulkhead with two clamps. If the clamps are tight then the steering rack clamps have come away from the bulkhead. That steering rack must be fixed and immovable otherwise the left wheel (for example) hits a pothole and transmits it through the loose steering rack to the right and jerks your steering wheel too. You may have found your problem there. (There are aftermarket kits that brace the steering rack because of the flimsy metal it's bolted too. Saabs are really prone to it and they share the same underpinnings as the calibra)

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Re: Steering wheel vibration
« Reply #42 on: November 16, 2018, 11:53:14 AM »
Thanks for the comment, I hope this is it! I have a spare (2nd hand) rack that does not show this play... a job for the weekend :)

The rack fixation points themselves are OK and tight. It looks like play within the rack itself.

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #43 on: November 17, 2018, 17:34:45 PM »
Hi I got fingers and toes crossed ;D

As electric green said.....you may have found the culprit......that naughty little Gremlin had to be hiding somewhere Lol

Electric green ......" You're the Man"  you are very knowledgeable.......and that makes you............My Best Friend 8).....well done.

If you are not a professional mechanic......then you should be.  Can't wait for you to get back to us wim.....hope this loose steering rack sorts it.
Just seen the video :o Very scary, that is the steering rack that should be bolted tight to the bulkhead with two clamps. If the clamps are tight then the steering rack clamps have come away from the bulkhead. That steering rack must be fixed and immovable otherwise the left wheel (for example) hits a pothole and transmits it through the loose steering rack to the right and jerks your steering wheel too. You may have found your problem there. (There are aftermarket kits that brace the steering rack because of the flimsy metal it's bolted too. Saabs are really prone to it and they share the same underpinnings as the calibra)


Offline electric geen

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Re: Steering wheel vibration
« Reply #44 on: November 18, 2018, 14:26:15 PM »
Hi I got fingers and toes crossed ;D

As electric green said.....you may have found the culprit......that naughty little Gremlin had to be hiding somewhere Lol

Electric green ......" You're the Man"  you are very knowledgeable.......and that makes you............My Best Friend 8).....well done.

If you are not a professional mechanic......then you should be.  Can't wait for you to get back to us wim.....hope this loose steering rack sorts it.


Not a mechanic, just an contract engineer having worked for 30+ companies.  wim_vg has a complete nightmare on his hands and it's easy to throw in the towel and move away from Calibra's - and I don't want that to happen, nobody here does, so we all try to help with the little bits of info that aren't always in the manuals or hidden away online. Sometimes being so close to the problem makes you blind to the solution and a problem shared is a problem halved.

After writing this I am going to take my Calibra out for a run with her indoors (who likes the Calibra more than me (it's a women thing, they just love Calibra's)). I have a company car provided  by my employer after they saw me driving to work every day in the Calibra and thought it would fall apart at any moment it was that old - it never did - but I appreciate the freebie vehicle, but then you get in the Calibra and think today's cars are not that nice to drive with their diesel turbo lag or comfortable either, far to high and certainly not very attractive.

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #45 on: November 18, 2018, 16:03:10 PM »
I agree entirely.

The Calibra is an iconic car and has fans all over.......when I stop at traffic lights it's sometimes like an open air Auction......lost count of the times I have been asked "Do you want to sell it"

Pulled into Halfords car park....this guy in a flash Beemer drooled with glazed eyes........then it happened.......pssst.... .I will give you £5,000.00

As she stands right now.  I turned out him and his mate own a garage and are buying old school cars to do up and drive them to shows etc.

The reason I mentioned this is that my her indoors nags me with...."why can' we buy a modern car that doe's not keep breaking down" ?????

I said one day ...."I think I will sell my Calibra love"...........She was like foookin  Jeckle and Mr Hyde......"Don't you bloody dare Lol

Woman they never make sense...do they :-\

Anyway sorry to digress from poor wim_vg and his problems.......there will be good and bad times due to the age of Calibra's and deminishing

numbers.....we will soon be in No Tax needed.....Classic Car times..... 8)

Keep your chin up wim_vg.........if you do happen to cross the rage threshold....throw the Rubber Hammer at the windscreen....not the metal thingy Lol.  ... ;D

Offline wim_vg

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Re: Steering wheel vibration
« Reply #46 on: November 19, 2018, 20:33:42 PM »
Cheers all, I guess my wife thinks about the same about my old car... even if I tell her its younger than she is :-)

So... I managed to swap the steering gear and must say I got a relatively positive feeling about it. Steering feels much more certain and direct. It still jerks a bit but feeling is considerably less.
Still need to get an alignment done again... maybe some remaining symptoms from this, not sure. Planned for next Monday.

The other thing I could think of is that the new springs (which feel stiffer again), combined with the 17" ET44 wheel also contribute to it. Have been thinking of refitting the original springs, but not sure if worth the hassle.

Offline electric geen

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Re: Steering wheel vibration
« Reply #47 on: November 21, 2018, 22:22:50 PM »
Your running 17 inch rims with I guess rubber band tyres, (30 profile?) Definitely sure your wheels are ET44 not less? How is the car on self centering when you turn left or right whilst moving then let go of the steering wheel (low speed 10 mph 15 kmh) , does the steering wheel return by itself fairly slowly to the centre position or does it whip round or does not return at all? Trying to find out if your steering is stable or fidgety trying to fight you left or right whilst traveling in a straight line.

This behavior is governed by the castor angle which is not adjustable in the Calibra Suspension (the book say's it +2 degrees +/- 1 from the vertical which means that the suspension legs slope backwards (i.e. the top of the strut mount is in front of the hub centreline). The self centering of the steering wheel indicates what has happened to your castor angle - no return means 0 or negative castor, fast return means more than 2-3 degrees of castor angle. It can be measured with a protractor with level gauge, but if you go to a proper alignment place they should be able to measure it. (If the castor is really negative it will be difficult to steer (heavy) to the left or right).

Using low profile tyres without the ideal ET49 will cause a bump steer as the wheel's force on the suspension leg is offset (at the moment by 49-44 = 5mm) not a lot but you have virtually no sidewall to absorb that 5mm disparity. Try to get some normal Calibra wheels to try just on the front to eliminate the 17 inch wheels if it is affecting the steering/suspension. Vauxhall were very insistent on the ET49 as it made perfect geometry for their suspension set up regardless of the width of tyre (within reason).

Offline wim_vg

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Re: Steering wheel vibration
« Reply #48 on: November 21, 2018, 23:06:49 PM »
The wheels have 45 profile on them.

The steering is returning quite normal to center, but not to the full 100% - say a cm off or so.

I am thinking indeed more in the lines of bump steer now. Perhaps this feeling has also grown to me over time and 50% of it is personal perception. For example when my wife drives the car she does not report anything at all :)

Offline wim_vg

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Re: Steering wheel vibration
« Reply #49 on: November 28, 2018, 08:37:32 AM »
So the shimmy is still there in the steering wheel... not sure what else I can do :(

Offline electric geen

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Re: Steering wheel vibration
« Reply #50 on: November 28, 2018, 11:38:00 AM »
Arghhhhhhhhhhhh......... ..... The only time I get a shimmy at high speed is when my tyre pressures are uneven (slow leak through the rim). Try different wheels upfront if you haven't already.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #51 on: December 04, 2018, 20:29:28 PM »
Hmm yes I will try that too. I wonder if it would help though, there is no shimmy when driving fast on a good road. Only the small bumps on worse roads do pull the steering wheel.

Would it really be bump steer? And if so what are attention points to look for?

Offline electric geen

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Re: Steering wheel vibration
« Reply #52 on: December 07, 2018, 21:08:23 PM »
I would change the wheels for standard calibra wheels first and try them to eliminate the aftermarket one's you have on now, after that, as you have tried everything else is to find a crash body repair shop who will put the Calibra on their table and find your problem in 5 minutes if it is a suspension or chassis geometry problem (they have all the measurement data for the chassis/suspension). Even if they find the chassis bent it's not the end of the world as it can be pulled straight (one time only though).

I am assuming you have been around every bush and joint on the car with a pry bar to check for bad bushes? including the anti-roll ones sitting on top of the front sub frame? Checked the front bearings for play?

Bump steer is caused by something very mis-aligned, it is not standard on production cars.

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Re: Steering wheel vibration
« Reply #53 on: December 07, 2018, 23:38:32 PM »
Thanks for the help, appreciate it.

Yeah, I am pretty confident about all joints... also had a friend working at a professional dealer look at all of them and he said they were all tight.

The only thing that I am still not confident about myself, is the steering gear. I am suspecting the other one I installed being a second hand one also has play in the vertical direction. I am thinking about getting a refurbished one.

First I will try other wheels though!

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Re: Steering wheel vibration
« Reply #54 on: January 13, 2019, 09:50:50 AM »
Refurbished steering gear is in and situation has improved!

Now I think the remainder is down to stiff suspension in combination with higher size wheels (lower profile tyres).

Any way to soften the suspension?
Maybe I should get rid of the Bilstein shocks... not sure about the springs?

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #55 on: January 13, 2019, 13:46:48 PM »
Hi wim_vg.

Best wishes for the New Year....Regarding the good news you mentioned about the refurbished steering rack making a difference things are looking up.

I think now you should go with electric geen's advice about changing back to standard wheels for your next job......We have to accept that

the design engineers factor in all the technical pros and cons about what works best etc. ............Once we as owners start changing the configuration's set by the design engineers we are at risk of causing more problems.

Sometimes there is room for improvement over the design standard and of course products have moved on and improved vastly from the early Calibra manufacturing days.

Yes you can improve handling.....speed ...and  performance etc but you can also mess up big time. ....So back tracking  on your car mods is the best way forward especially as you have eliminated faulty suspension joints etc.

As I have always said......The Calibra is a Sports Car.......designed to go fast......grip the road better with 4x4.....etc....So there is a trade off between Comfort in the one hand and Speed and Performance in the other

Look at Raiiy cars......they are true bone shakers Lol.......no creature comforts there.

Sorry for the long winded post and forgive me if I appear to be preaching .........truth is I don't get out much Lol.


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Re: Steering wheel vibration
« Reply #56 on: January 13, 2019, 16:57:30 PM »
Yeah no worries there! I have realized I will need to live with at least part of it.

I appreciate all that's been provided so far and will follow your advice and go standard wheels next. Cheers!

Happy NY to all ;)

Offline electric geen

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Re: Steering wheel vibration
« Reply #57 on: January 15, 2019, 21:00:24 PM »
Stiff suspension - you are going to tell us that you changed the bushes then dropped the calibra on it's wheels then tightened the bushes up? Sometimes if you tighten them with wheels in the air they will hold the suspension at a different angle (until they break eventually).

Change the wheels at the front for originals and go for a ride in the dark - no one will see you!

Offline will

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Re: Steering wheel vibration
« Reply #58 on: January 16, 2019, 12:14:56 PM »
wim_vg, just seen this thread and the nightmare you're having  :( I cannot offer any advice other than what has already been provided by people with far more mechanical ability: I hope you get it sorted.

And I agree with the comments made by others (TURBOHEAD, electric green, etc), its a lovely car and it's great that people still care. I have not seen another one on the road, especially where I live  :(  I've had people follow me and positive comments from other drivers on the Calibra. Like you, I'm determined to keep my original SE6 auto on the road.

Good luck!
Drives: an original SE6 auto, 86,000 miles (approx) and still going strong......(but some work is needed!). Now my second car.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #59 on: January 29, 2019, 19:56:04 PM »
So.. have been thinking now during these colder days. It feels like ride quality changes from day to day a bit. Some days, I feel bumps a whole lot less, then on other days, I can feel every line and bump in the road. The sound the suspension makes when impacting bumps is also varying; sometimes a softer thumb, other times feels harder. Not sure what causes this variability... other than that there may be some play here or there, but I am still yet to find it.

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #60 on: January 30, 2019, 12:15:55 PM »
Hi wim

It still remains a mystery as to the cause......and the nasty gremlin is stilll causing you problems.

I have been thinking.......have you checked the tightness of the Subframe Bolts because the Subframe as you know supports all the items you have checked so far.?

Apart from this I am truly at a losss.

Good luck

Turbohead

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Re: Steering wheel vibration
« Reply #61 on: January 30, 2019, 22:52:23 PM »
Yeah it bites me to the point I do not like to drive the car anymore :(

Subframe bolts are fine actually.

I did notice something new/strange in the last days. I double-checked the front shock nuts during the weekend and found one end a bit looser, not sitting tight. The other end was fine. Today I checked again and the other end, which was fine before, had loosened a bit. Find that strange, but the after retightening the steering feels much better.

Any clues as to what can loosen that shock nut? There's actually a dish with another nut on top of it... both nuts are tight against one another... so how could it get loosened underneath?

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #62 on: January 31, 2019, 11:09:56 AM »
Seems to me there is abnormal movement in the suspension etc.......nuts and bolts need to be tightened to the correct specification using a Torx Wrench.

I understand what you mean about not enjoying driving your car.?....when it gets to that stage it is really sad.

Offline wim_vg

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Re: Steering wheel vibration
« Reply #63 on: January 31, 2019, 11:24:17 AM »
Hmm yeah I fully agree. Actually I went through checking all bolted connections (tie rods, tie rod ends, drop links, lower arms, subframe...) and the shock nut was the only one that was off.

Funny thing is I checked the tightening with the torque wrench, but few days later it was sitting looser again for some unknown reason.

At least hopefully I now pinpointed the problem.
Best thing I could do I guess is to take the strut out and fully recheck it...

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #64 on: January 31, 2019, 14:19:22 PM »
Great news wim

Sometimes the thread on the bolt or holding nut stripes and will as a result work loose. This should be checked to see if this is the case.

I would also consider using ......"Lock Thread" which is a type of glue and is used to assemble engine components.......this will ensure the nuts will not work loose in the future.

You will still be able to remove the nut or bolt using a spanner.......The product in U.K. Is called..."Locktite".


Offline CalibraNath

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Re: Steering wheel vibration
« Reply #65 on: February 02, 2019, 10:25:55 AM »
Steering wheel vibration can be a result of the front roadwheels getting bent or warped from impact with something solid like a kerb. I had the same problem with the driver's side strut nut loosening (either the garage didn't use threadlock or the poor state of the roads) so I raise the car, lift the dust boot using the road spring as a lever point, cut a small groove in the left side of a couple of the nut face sides & used a long screwdriver with a rubber hammer to knock it to the left which tightens it up.

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Re: Steering wheel vibration
« Reply #66 on: February 03, 2019, 14:52:04 PM »
Cheers, I think my wheels are straight as far as I can tell... Front tyres are also new since last summer. Would this cause a shudder hitting bumps though?

I made today some more checks.

Lifted up the front end while standing still... cannot find any play in the subframe as far as I can tell. Are there any specific locations I should be checking? Just to avoid missing the obvious.

Also jiggled the front wheels left/right. This immediately and very easily spins the steering wheel. Is this normal? It looks a bit weird...

http://www.icone-music.be/files/Wheels.mp4

Cheers

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #67 on: February 03, 2019, 17:55:19 PM »
Hi wim

The only movement if any would be caused by the large bolts that secure the Subframe would be if they have not been tightened properly.

To be sure you would need to re tighten the Subframe bolts to the specified Torx. .........there is another area to check is the two bolts one horizontal and one is virticle which bolts the lower arms to the Subframe.

The horizontal bolt goes through the lower arm front bush and is retained by a " Captive Nut " ........these Captive nuts can break loose causing the lower arm to move back and forth.......if this has happened you would hear a metallic clunking noise or rattle.......the Captive Nut is only spot welded inside the sub frame box section and due to rust can break off.

There is no danger of the front end of the lower arm coming offf ......but will if broken make noises........Sorry I am not able to send you any photo's to show you what I mean.

Last thing the round doughnut shaped bush the other end of the lower arm can deteriorate causing a loose fixing and that would also cause a clunking rattle type of noise.......if this was the case if you don't hear it when driving you may well feel it through to the steering wheel as you have previously described

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Re: Steering wheel vibration
« Reply #68 on: February 10, 2019, 10:35:36 AM »
Thanks once more for continiung to provide me with good advice! Sorry to keep coming back to this over and over... consider it as a strong will to keep driving my beloved car ;)

As far as I can tell, just by attempting to turn the bolts in any direction, they are sitting tight. This goes for both the front and back lower arm bolts, as well as the subframe bolts that I showed on the pictures. Should I untighten and retighten to be sure? Not sure if there is any risk of doing that, so want to be sure...

Wish I could make a close-up video of how everything interacts in the suspension when hitting a bump :)

From what I can tell, I should also rule out bump steer. I think this would normally have to show as well when driving over a smooth bump, but it does not. The steering wheel only seems to shudder on 'impact'.

Cheers again!

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #69 on: February 13, 2019, 21:48:16 PM »
Hi wim.

Don't worry about keep coming back with more questions.........we are as keen as you to try to resolve your problem.   You are very dedicated to your car and we can all understand that.    I have now reached a point that I cannot think of any thing else you can try. :-\

Do you know or have some friend that owns a Calibra so you could drive their car along the same route to see if it reacts to bumps etc.??
Have you been to your nearest Opel/Vauxhall dealer to see if they can help??

Sometimes a fault when driving can amplify the problem in ones mind because you are acutely aware of it every time you get into your car.

It would be valuable if you could get a mechanic to drive your car.....but don't tell him what you know of the problem........and see if after a test drive he comments about the same bumpy ride etc that you are experiencing. ??

So by not alerting him to what you know of the problem......he will comment independently. If that makes sense??

Good Luck.

Offline electric geen

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Re: Steering wheel vibration
« Reply #70 on: February 18, 2019, 19:30:36 PM »
Did you take any pictures of the top mounts when you changed the shocks and springs - they could be perished - mine are, are your shock absorber bump stops in place? The crashing when hitting bumps is usually shocks gone (or too weak for strong springs) or play in the top mounts (25 year old rubber).

Offline wim_vg

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Re: Steering wheel vibration
« Reply #71 on: February 19, 2019, 20:05:23 PM »
Yeah, did also change all of those... new top mounts, bump stops etc. Was basically a full strut overhaul (except the knuckle itself). Problem was there before though, so unfortunately seems unrelated.

Will keep on looking!

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Re: Steering wheel vibration
« Reply #72 on: March 10, 2019, 14:25:44 PM »
Hi all,

Here's another video of the steering wheel shake. Just in case I forgot to mention before, it is not an up/down shake, but a left/right juggle once I hit some kind of road bump. Basically, the road I'm driving on is a concrete (not asphalt) type road with a lot of very small bumps in it.

http://www.icone-music.be/files/Calibra/SteeringVibrationContinues.mp4

FYI, I had another DIY mechanic check out the car and he could not notice anything visually or play in the components... mystery continues.

FYI2, the other Calibra I have (1995 X20XEV) does not have the same issue. Not juggle or anything like that.

Offline TURBOHEAD

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Re: Steering wheel vibration
« Reply #73 on: March 11, 2019, 20:09:41 PM »
Hi wim

I played your recording  several times.....I know you have to loosen your grip on the steering wheel but I think it's more of a vibration that you are feeling ....and less visual movement.

In South Wales we have several concrete road surfaces.........and as soon as I drive from Tarmac to concrete I can als feel vibration through the steering wheel.

When stopping on the concrete road.......the surface is made up of ridges......a bit like corogated cardboard surface.  The concrete has this finish left after the road workers use a long wooden board which they tamp the wet concrete to level it leaving long ridges for extra grip.

May be this is the cause of your steering problems.

Sorry for my long winded explanation  :P

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Re: Steering wheel vibration
« Reply #74 on: March 12, 2019, 10:18:11 AM »
Hi,

Thanks. I do realize that this sort of road would give vibrations, though I would expect more up/down vibration instead of a left/right shudder.
That's basically what worries me :)

What does seem to help is further tightening up the drop links. I replaced these about a year ago. I always thought the rubbers were a little soft. Should these be hard and tightened really well? I am always scared of pulling the thread right out of the drop link (squeezed on plastic type).

Cheers

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Re: Steering wheel vibration
« Reply #75 on: March 12, 2019, 16:52:15 PM »
Hi wim

The drop links fitting info in my Calibra Haynes manual advises to measure the distance between the top surface to the bottom surface to ensure the correct compression of the rubber bushes.      The recommended distance should be.....38.0mm to 39.0 mm....measured using manual or digital calipers.

How your car behaves on different road surfaces depends on the type of suspension.....tyres and correct inflation ....how your suspension is set up and fitted etc etc.   If any of the components are worn....damaged....or not fitted correctly can cause problems.

I think you have done really well so far with changing related suspension parts......but after all this you will have to accept that you may have to live with it........unless someone can find the exact cause and fix it.

That eureka moment is well overdue.......I don' feel that your car is dangerous to drive.......it is just a niggling quirky thing that persists but can be safely ignored.

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Re: Steering wheel vibration
« Reply #76 on: March 12, 2019, 20:28:03 PM »
Thanks again, much appreciated. I do realize that some of it I have to live with... MOT check also does not show any concerns, which I guess adds to being reassured it is not a safety concern. It does also get to your head over time and becomes worse just because of that!

Well, I do have a Haynes manual and indeed it refers to measuring that distance. Right now, it measures about 41mm, but feels already really tight... hence a bit scared to overtighten and actually break the drop link. Well, maybe it will not happen... in any case, I've ordered some spare drop links and will give it another go once I have them :)

Thanks again for all the support!

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Re: Steering wheel vibration
« Reply #77 on: March 16, 2019, 20:15:46 PM »
Wim_vg, I looked at the video too and can see what you mean by crashing coming through the steering wheel. You are on concrete roads going over the sections (we can hear) then you come to some real bad ones and you get a thud going through the whole car.

I had this problem with an XJS years ago and it comes down to this. Your suspension is to stiff, it would rather push the body of the car up than absorb the bumps, however, the faster you go i.e. 80mph+ the ride is smooth and the car feels well planted. Tricky situation. Technically there is nothing wrong yet the crashing suspension says there is. Your springs and shocks - your shocks especially are too stiff and are not giving in to sharp shocks but maybe are to slower bumps. Are your shocks really quality items you can vouch for? or ebay knock offs (unknown to you). I changed my shocks on the XJS for some really expensive ones that I personally collected from a distributor with long track record of quality (but not the cheapest distributor). The video to me shows unresponsive shocks - they just not working.

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Re: Steering wheel vibration
« Reply #78 on: March 17, 2019, 13:52:06 PM »
Hi wim  :)

I watched your video again also.......but concentrated on the sound side using head phones for the first time.  The noises Indicated a harsh response as you have been saying all along.

Can I just point you to a website called......." strutmasters.com".....they give 5 points you should experience after fitting new shocks and springs.
They say new shocks and springs need time to break them in etc.......and that new springs will eventually bed down to a softer performance.

Electric green......has advised that your suspension is too stiff and is not performing correctly..........be it to do with Strutmasters
Comments about new shocks and springs or faulty ones.  New items don't always mean good working order >:(

You have checked and had checked by other people....all of the subsidiary' components ......and those parts have been ruled out.
So we are left with possible faulty or poor functioning shocks and springs. They say that in production only a random batch of items are tested
so the new springs that go through.......have never had a large weight put on them prior to You fitting them.

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Re: Steering wheel vibration
« Reply #79 on: April 02, 2019, 07:51:51 AM »
Hi all,

Well, good news is that the springs are actually quite soft. I fitted new ones... sorry forgot to mention. So spring rate seems irrelevant.

What seems to improve... oddly, by chance I tightened the nuts on the drop links some more and the car was a lot more stable. If only temporarily though for about a week or so, then it turned again to unstable.
I am also hearing a faint knock from the front side... could it be that the drop links, although fairly new, are not OK? Visualy it is hard to see anything wrong really...

Cheers

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Re: Steering wheel vibration
« Reply #80 on: April 03, 2019, 14:00:27 PM »
Hi wim :)

It's good to hear that by a bit of tweaking you have made has given some improvement.......spring s and how they operate is crucial to how they absorb rough road surfaces...........regar ds the drop links.

I would check the threads on the drop links and also the threads on the securing nuts for any evidence of thread dammage.  The best nuts to use is  "Nylock Nuts" which by there construction will lock in position .........after proper tore settings are used.

You are definitely in the right area of investigation so to speak...........I have had nuts that tighten almost to the correct Tory when one more slight turn with the spannner pops loose >:(

In manuals they always advise to fit New nuts and bolts........but it's easy to ignore this advice thinking the fixings you have removed seem ok.

You will solve the problem at some point......good luck  8)

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Re: Steering wheel vibration
« Reply #81 on: May 14, 2019, 21:38:03 PM »
Hi again,

So I reckon some of the fine-tuning is in the proper fixing of the suspension components... this I can live with!

However, there is something about it that still puzzles me. The steering wheel oscillation seems to vary day by day. One day it is much more pronounced than others. I am pretty sure it is not just a feeling. Any ideas to what could contribute to that?

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Re: Steering wheel vibration
« Reply #82 on: May 20, 2019, 10:20:48 AM »
Hi again,

Yesterday something strange happened. I was needing to take the highway and needed fast acceleration. When coming onto the highway, the steering wheel was no longer in center,  but slightly to the left when driving straight. I did not hear any noises or anything. When driving again the morning after, steering was back ok. What could have caused this???

My good guess is whatever caused this might be the root cause of the whole thing...

Cheers
Wim

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Re: Steering wheel vibration
« Reply #83 on: May 23, 2019, 22:31:42 PM »
I'd be looking at wear in the steering knuckles... are you sure the wheel bearings aren't free spinning?

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Re: Steering wheel vibration
« Reply #84 on: May 24, 2019, 10:29:50 AM »
Thanks. Did check the bearings (6-12 position pull on the wheels) and they are super-solid...

Steering wheel vibrates now as of 90km/h and above.

Hmm... keep the tips coming please! ;)

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Re: Steering wheel vibration
« Reply #85 on: May 24, 2019, 13:13:43 PM »
Did check the bearings (6-12 position pull on the wheels) and they are super-solid...

You've only checked the integrity of the bearing itself by doing this. Best to have a reputable workshop investigate this. if not, IMO your next issue will be an unbearable grinding noise...

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Re: Steering wheel vibration
« Reply #86 on: May 24, 2019, 17:41:58 PM »
Aha, interesting... I'm planning a workshop visit, but was planning on getting the steering knuckles off this weekend. Is there a way to visually check the bearing for OK?

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Re: Steering wheel vibration
« Reply #87 on: May 24, 2019, 22:32:48 PM »
Is there a way to visually check the bearing for OK?

First up I'm not a mechanic or engineer but I've been reading this thread from the sidelines for quite a while. Kudos to you for attempting to solve this yourself ,but, and not wishing to be rude, it seems you're long past investigating some of the more obvious possibilities and now your clutching at straws...

A failed bearing will not exhibit the behaviour(s) you describe.

Without reading through the entire thread to see what parts you have replaced I don't recall reading you have fitted new hubs or bearings. With the possibility I described it could turn out that both your hubs and bearings are fine, though maybe not...

AFAIK steering knuckles are NLA. If I were you I would discuss this issue with a reputable repairer and suggest what I think could be your issue. If in THEIR OPINION my theory holds water so to speak then your time would be better off sourcing a second-hand set of knuckles and have them checked that the outer bearing fits to tolerance.

FYI,

The section marked in red shows where the outer bearing is supported. Excessive wear here IMO explains almost all of what you describe; crashing, noisy, changing drivability from day to day. Think about load, heat, acceleration etc.

As I said earlier I'm no expert, but I do think this scenario is worth proper investigation.

Good Luck!

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Re: Steering wheel vibration
« Reply #88 on: May 25, 2019, 08:36:48 AM »
Thanks and no problem being straightforward. I have and will continue to appreciate all feedback on this great forum.

I did already have a couple experienced mechanics/friends look at it and they could not find anything.

The reason I keep looking myself is that I am a mechanical engineer by education... so it is in my blood to understand how things work and how I can fix them :)
Maybe that and being stubborn...

I will surely take your advice, thanks again!

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Re: Steering wheel vibration
« Reply #89 on: May 30, 2019, 16:25:55 PM »
I got the knuckles off and driveshafts out to check the bearings more closely. Visually I cannot see anything wrong and by touch and trying to move they are tight. Was at least hoping this would show a clear sign... granted it is not the same with the weight of the car and force enacted by the driveshafts, but it does not seem obvious... good I am not a quitter and love the car still :)

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Re: Steering wheel vibration
« Reply #90 on: May 31, 2019, 23:06:24 PM »
Did you remove the bearings?

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Re: Steering wheel vibration
« Reply #91 on: June 10, 2019, 20:36:38 PM »
Your bearings will indicate by mileage whether they should be replaced.

The Calibra setup is very old fashioned small diameter and bad design for side loading. Previous comment on the steering knuckle (bearing housing) is important if everything else has been ruled out. These can be deformed by kerbing, even the ball bearings can be crushed and flat sided. If you had the leg off -  for the price of the bearings to be pressed out and new pressed in and if the Calibra was high mileage might have been a good idea if it had to be done eventually.

You will never gauge the bearings wear when they are cold, when cold any movement is a sign of the start of a bearing collapse. As a mechanical engineer you would know that vibration turns to audible frequency that you can hear and feel, if the problem is at 90kmh there is a sound? the frequency of that sound in Hz is the revolutions of what is worn - lets hope it´s not your differential (pinion) which is turning around 3.46 times faster than your wheels. it is a rotational problem you have and not a clunk (which is top mounts)?

I have a rear bearing that starts whining after 2 hours at 60+ mph, just as everything has heated up to maximum. otherwise you would never notice everyday.