Author Topic: Overheating  (Read 1876 times)

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Offline neilwesleyporter

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Overheating
« on: June 03, 2017, 20:57:11 PM »
Hi i have a c20ne engine and the engine gets hot quick just over a mile and its up to 90 degrees then carries on just under 100 then drops down to about 96 97 degrees. This is not in standing traffic i could understand that. Anyone any ideas. I have changed the waterpump thermostat and temp sender sensor. 

Offline sealeysonic

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Re: Overheating
« Reply #1 on: June 03, 2017, 21:50:15 PM »
Hello mate.....has it always been like this...?

you had any work done before hand....?

could be a air lock.....blocked rad maybe....?

Offline sechtor

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Re: Overheating
« Reply #2 on: June 04, 2017, 14:11:41 PM »
I would check the thermostat first. this is one of the main thing ages and locks in open or closed position after seasons change.
Second, air in the system ...caused by some leaking somewhere in the underneath - but this will notice you by the need to fill up the expansion tank

Offline neilwesleyporter

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Re: Overheating
« Reply #3 on: June 05, 2017, 18:01:27 PM »
I would check the thermostat first. this is one of the main thing ages and locks in open or closed position after seasons change.
Second, air in the system ...caused by some leaking somewhere in the underneath - but this will notice you by the need to fill up the expansion tank
Hello mate.....has it always been like this...?

you had any work done before hand....?

could be a air lock.....blocked rad maybe....



Top right pipe from the rad that goes across and to the coolant bottle doesnt get very warm. Can anyone try they car and let me know if its nornal.

Offline CalibraTurbo666

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Re: Overheating
« Reply #4 on: June 06, 2017, 08:10:43 AM »
Flush the radiator and the engine in both directions with hosepipe to remove any silt.

I usually run it a few minutes with dishwash liquid in first....but the amount of bubbles can be interesting when you take the bottle cap off...

Offline sechtor

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Re: Overheating
« Reply #5 on: June 06, 2017, 15:22:43 PM »
op right pipe from the rad that goes across and to the coolant bottle doesnt get very warm

That is because your circuit is not open at hot. C20ne has the open temp at 87 Deg

So with your car standing , engine running at iddle, when you see the temp on the dash over 90deg, and that pipe is still cold,then "test" with your hand the top left big hose. If that gets hotter, then is the Rad
If it doesn't get hotter,  then you have your answer- is thermostat

Offline sechtor

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Re: Overheating
« Reply #6 on: June 06, 2017, 16:14:41 PM »
ps:do the test above in the morning, at cold start with your hood open, otherwise, temp built under the engine compartment may fool your "measurements"

Offline Jepwee

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Re: Overheating
« Reply #7 on: June 06, 2017, 17:50:44 PM »
Hi,
 Does the engine actually boil over.

Offline neilwesleyporter

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Re: Overheating
« Reply #8 on: June 06, 2017, 18:39:14 PM »
Only have u drive 1 mile then its at 90 degreees already that cant be nornal. Any one has any ideas
Top long coolant pipe from the coolant bottle that goes across the front of car above the radiator and connects to the top right side of the radiator. It doesnt really get warm can anyone try theres and let me know. Cheers. Its the c20ne engine.
Already had fitted a watetpump. Thernostat. And temp sender but still no joy. If i squeeze the big fat pipe to the right of the engine u can see the bubbles in the bottom. So it cant be air lock. Cause the water is getting to the bottle when i squeeze the pipe. Any ideas. It has always done this since i had it 11 years ago but not really bothered with it.

Offline sechtor

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Re: Overheating
« Reply #9 on: June 07, 2017, 06:48:09 AM »
1.  1mile is not bad, especially in hot summer days. But try to see if after threshold of nearly 90 temp drops a bit- that is happening if only all ok - no big air traps in the rad, and fully functional thermostat
2. "u can see the bubbles in the bottom"- Air bubbles traps are "fixed" by the upper thin hose in the bottle- there you should see the water coming from if you squeeze that fat hose.

Offline neilwesleyporter

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Re: Overheating
« Reply #10 on: June 07, 2017, 15:39:58 PM »
No air lock because all the radiator gets hot it isnt cold in places. Its completly circlelating. Is there any calibra or car shows this summer

Offline Jepwee

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Re: Overheating
« Reply #11 on: June 07, 2017, 20:41:35 PM »
Hi,
 I have a C20NE , Outside temp 15deg, heater set to cold,50MPH, temp gauge showing 94 deg. Around town 96 deg, fan comes on at 99deg. Mine gets to about 90 after a mile and goes to 94 and generally stays there. Take it for a run and see what temps you get and see if it boils over. If it does could be head gasket as you seem to have done everything else.

Offline neilwesleyporter

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Re: Overheating
« Reply #12 on: June 08, 2017, 14:16:32 PM »
What do u call a run i did 20 miles the other day and it didnt boil over. Theres no exvessive pressure in the coolamt bottle when i slowly remove the cap. Isnt there a compression test to see if the head gasket has gone. But it always been like this and its never boiled over

Offline sechtor

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Re: Overheating
« Reply #13 on: June 08, 2017, 14:33:04 PM »
I guess you just have enough time to care more about your Cali, which runs perfectly normal.  :)
C20ne you bring very rare above 100deg , which for example is a common thing on C/X25XE due to lack of room , multiple exhaust manifolds, and higher thermo threshold.
" compression test to see if the head gasket has gone"- A: Most compression is not lost in there, but trough piston rings.
You will see foam in the watter if you have gasket issues- oil goes in the water.

You car is pretty much ok mate , you have none of these

Offline Raffles

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Re: Overheating
« Reply #14 on: June 28, 2017, 11:52:13 AM »
When I bought my C20NE home after buying it, it sat just below 100 all the way around the M25 on a rainy October day.

The bottom half of the rad was completely blocked. Now, it warms up very quickly. Fitted a 92 degree thermostat and fan cuts in a tiny bit past 95.

ON that note, has anyone removed the blanking panel behind the v-grille? Seems to me, the rad could do much more if it wasn't there.