Author Topic: Tyre wear  (Read 9446 times)

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Offline Jepwee

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Tyre wear
« on: November 13, 2020, 17:06:32 PM »
Hi, had the car MOT'ed on Monday ,all OK apart from wear on the rear n/s tyre inside edge. Checked shock absorber OK ,large sub frame  bush OK, wheel bearing and all lower arm bushes tight. The fronts and o/s rear tyres are OK and the car has not been in an accident or hit a kerb. Has anybody had this before this type of wear before.?

Many thanks

Offline Jepwee

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Re: Tyre wear
« Reply #1 on: November 14, 2020, 20:21:25 PM »
Hi , reading through many threads this seems a common problem but know one has an answer. Is it the trailing arm bushes worn or the large bush that connects sub frame brace to the sub frame. The car has not been lowered so the camber/toe in are factory. Interested in your comments.
 Many thanks

Offline Jepwee

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Re: Tyre wear
« Reply #2 on: November 17, 2020, 20:31:36 PM »
Hi, as I have had no answer to help me with the problem I have decided to change the n/s trailing arm bushes. Today I lowered and refitted  the rear subframe just enough to reverse the outside trailing arm bolts to make it easier to fit the ordered bushes without having to drop the subframe to the floor.
 Many thanks

Offline Jepwee

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Re: Tyre wear
« Reply #3 on: November 20, 2020, 17:06:53 PM »
Hi, still waiting for the rear bushes, 176 views and no comment ?

Offline agw9262

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Re: Tyre wear
« Reply #4 on: November 21, 2020, 08:49:53 AM »
Hi

Can’t say that I have a solution for you as such but it is common, partly due to the negative rear wheel camber on the calibra. If the car is lowered then the problem is amplified. It can be adjusted, to try to bring it closer to zero but not normally possible to reach zero.

Replacing bushes might help somewhat but if you want to really change it and alter the camber, especially if lowered, then you’ll need a bush kit that lets you do that - like this one:

https://www.powerflex.co.uk/products/Cavalier-Calibra+4WD+inc+GSi+with+independent+rear+suspension,+Vectra+A+(1989-1995)-736/1.html

Hope that helps
Andrew


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Offline Jepwee

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Re: Tyre wear
« Reply #5 on: November 21, 2020, 12:26:27 PM »
Hi Andrew, many thanks for the reply, I was beginning to think I was the only person on this planet. Using a spirit level ( I know its not accurate ) I found the top of the tyre leaning in by 5mm so as you say a camber issue. I have seen the adjustable bushes you mention but as my car is not lowered I hoping the new bushes will restore factory settings. I am still waiting for the new bushes to arrive via e-bay. These I think are getting a bit scarce as I tried 3 times from different suppliers to get mine. When I change them I will update you on there condition to see if that was the problem.
Many thanks again. 

Offline electric geen

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Re: Tyre wear
« Reply #6 on: November 22, 2020, 18:02:53 PM »
If all your bushes on the rear are 25 years old plus original springs, probably best to replace them all and repaint the rear subframe while your in there. Replacing a bush here and there is just going to push the problem to the next weakest link. I have recently done the whole lot on mine plus all the front ones too - makes a hell of a difference as to how it used to ride.

Offline Jepwee

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Re: Tyre wear
« Reply #7 on: November 23, 2020, 12:47:00 PM »
Hi,
 Thanks for the reply, I do agree with your assessment about changing all bushes, however as the o/s rear tyre is not showing any wear I am using this as a bench mark and not mudding the waters by changing all bushes. As an aside, last year I changed the large sub frame bushes from Vauxhall ( cost arm and leg ) When done I will take it to have it laser tracked if OK I will do the o/s bushes. As for the sub frame the car has been garaged for most of its life ( I have owned it for 20 years) is in good condition, but will paint the trailing arm when removed.

Offline electric geen

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Re: Tyre wear
« Reply #8 on: November 23, 2020, 20:49:28 PM »
Check these people out, I have bought the rears in red version which is similar to the current bushes, pretty cheap (especially compared to the UK sourced versions) and the Alfa boys buy them all the time (they have to - it's an Alfa thing....). The rear hangers are not available anymore so polyurethane is now the only option.

https://www.strongflex.eu/en/

Offline Jepwee

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Re: Tyre wear
« Reply #9 on: November 24, 2020, 15:05:03 PM »
Hi, Electric green.
 Many thanks for the info on poly bushes but I decided to use standard bushes , a however I did consider using them as they seem easier to fit than the standard bush which at the moment there seems no tool around to remove or fit. There is a tool for Vectra's rear 45mm 'rose' bush, same size as the Calibra's trailing arm bush but as there not a lot of 'meat' around the bush housing the tool has to be a dead fit.
 Many thanks

Offline Jepwee

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Re: Tyre wear
« Reply #10 on: December 15, 2020, 17:07:42 PM »
Hi all, update on changing the trailing arm bushes. Decided today to change the bushes, as earlier I swopped round the outside bolts the job should be easy. Dropped shocks, disc and brake lines then tried to remove the outside bolt, however the bolt head just hit the body so I had to undo the subframe 18mm bolt and jack up the body a little so the bolt could be removed. Great, then discovered I had been sent the wrong bushes 60mm long instead of 70mm. I ordered them a month ago on e-bay so I am not sure if I can send them back. I had a problem getting those as every where else was out of stock, so maybe the company I used sent me those thinking they were the same. Anyway all back together a job for Spring. Cheers

Offline Jepwee

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Re: Tyre wear
« Reply #11 on: December 16, 2020, 19:59:41 PM »
Hi all,
The sorry tale continues. I unable to source anywhere the correct Vauxhall bushes part number 90223456. The after market parts that I bought are made by Moog but have the wrong dimensions, to small, all other makes, Febi,Firstline,Delphi and many others all give the same size and look the same and state they are a replacement 90223456 ? I know I can go down the Poly bush route but I want to keep the car original. Has anybody fitted after market bushes to their trailing arms, if so what make did you use or maybe have unused original bushes sitting around.
Many thanks

Offline Jepwee

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Re: Tyre wear
« Reply #12 on: December 17, 2020, 20:40:22 PM »
 Anyone ?

Offline agw9262

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Re: Tyre wear
« Reply #13 on: December 17, 2020, 21:34:43 PM »
Sorry I can’t help as such. You could try to contact Autovaux - they’re usually very good on parts.


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Offline Jepwee

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Re: Tyre wear
« Reply #14 on: December 17, 2020, 22:13:22 PM »
Hi Andrew , Thanks for the reply, yes I have tried them, they only have pattern parts in stock. The only pattern part that looks the same is made by Topran but they don't give sizes. They seem to be available in Germany. I am still hoping some one who has in the past can remember the make they used.
Again many thanks   

Offline Jepwee

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Re: Tyre wear
« Reply #15 on: January 15, 2021, 17:11:40 PM »
Hi, just thought I would give an update tyre wear and rear trailing arm bushes. Managed to obtain 2 original bushes just before Xmas. To my surprise  there was not much difference between original and pattern parts. I noticed a slight noise from the rear bearing so I will change the bearing and check the brake back plate to see I its rusty where the brake shoes retaining pins go. Coming back to the rear bearing I understand it is a pig to remove. I have searched this site and Calibra Net for any pointers. Unfortunately there isn't any just that its a nightmare to do. I have checked YouTube there's nothing on Calibra bearings but if you put in Omega B, which shares the same bearing set up, there's about 4 how to do's video's. I am not going to use hammers but invest in a press and do it as per manual. Keeping my head down while this Covid storm is blowing and do the job when things settle down and its warmer.
Cheers

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Re: Tyre wear
« Reply #16 on: March 23, 2021, 20:37:56 PM »
Hi, Update on changing trailing arm bushes and rear bearing. Managed to obtain original bushes and rear bearing complete with new C clip. A trawled the net for advice. I found a Swedish guy on the Omega site who posted a load of photos how he changed his rear bearing. He used a front wheel bearing removal kit which contained 3 10mm/12mm dia long bolts that you screw through wheel bolt holes so you can wind out the hub. I was going to by a 6 ton press but I decided to follow this route and bought a 19 piece bearing puller set that contained the bolts to wind out the hub. I removed the rear brake caliper, shock absorber and spring. On closer inspection I found if I put the bolts with nuts behind them through the holes that used to adjust the hand brake shoes the bolts lined up with the bolts that hold the back plate in place. I cut 2 postage size 3mm steel to protect the bolt heads. I borrowed a 32mm 6 sided 3/4 drive socket and a long 500mm tommy bar to undo the rear nut. Without this setup I doubt I would have managed to undue the nut after first locking up the wheel side with a long bar. I screwed the hub out which came out fairly easy, the bearing did not come apart, removed the C clip, you need a good pair circlip pliers as the clip is an animal. The bearing kit contained all the mandrels you need to remove the bearing. Just a bit on the kit the threaded bar was 20mm thick, the nut had a thread 50mm long and a nice touch    the contained a small bearing thrust washer to fit behind the bolt head. After I set it all up it easily pulled out the bearing and after resting the puller pulled the new bearing backing in. Part 2 tomorrow.

Offline Jepwee

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Re: Tyre wear
« Reply #17 on: March 24, 2021, 18:24:39 PM »
Hi, Part 2 I forgot to mention that after I removed the hub I took off the hand brake shoes and removed the back plate. I have read somewhere that the 10mm Torx bolts are made of cheese and they are. I managed to undo them just before the splined tool began to strip the heads. I checked over the back plate and checked the shoe retaining pin holes, all ok. With the back plate out the way it gave me great access to set up the bearing puller. After I fitted the new bearing I removed the trailing arm. This still involved undoing the sub frame bolts and jack up the body so I could remove the bolt nearest the sill ( the bolt head hits the body work) With the arm out it was just a case pulling the old bushes out after cutting the lips off the old bushes. The tool I used was the old Cortina void bush tool , remember them ! worked a treat. With the bushes in I used plan A to fit the hub back in. The plan was to support the back of the bearing with a piece of tube, rest the lot on a steel plate and tap the hub back in. I found it impossible to hold the arm and try and tap the hub back in straight and not damage the bearing. Time for plan B. I found if I lightly tapped the hub in just a couple of mm there just a couple threads showing so I could screw the nut back on. I was worried that I might strip the threads but it was enough to start and wind the hub in. I used different pieces of spacer until the hub was back in. This just left ABS flange to fit. It was easier to hold the arm and rest the hub on the steel plate and tap the flange back on and refit the nut. There's know doubt that if you had a press fitting the hub would be a piece of cake. I would not rely on just using the nut I was lucky that the nut did not strip so I would not recommend it.  Just a note on the nut locking ring. I found it a pain to fit , the idea of the lock ring is cup shaped and when you tap it home the outside edges bite against the flange. If you don't tap it in square the edges bend and it falls out, great. After bending the edges back I found 40mm piece of tube and tapped in square so it locked in place. I will fit it all back tomorrow and see how it goes.

Offline Jepwee

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Re: Tyre wear
« Reply #18 on: March 25, 2021, 21:31:19 PM »
Hi, The car is now all back together. I now need a new tyre and have the suspension geometry checked. As for the faulty rear bearing I could only hear it when the wheel was jacked up off the ground not when the car was driven so I hope that's now ok.
Hope this thread has been helpful.