Help... my car is overheating

06-01-2005, 07:18 PM

Hi, sounds like the dreaded cylinder head gasket. Sorry.

I did mine as reported almost 6 months ago and all is well. Dont be afraid to have a go yourself.
If you need convincing get a sniff or block test done at your local garage. That is a chemical added to the coolant. If it turns (green I think) then you have exhaust gas in the coolant.

I would not mind a bet that when you do get the head off the leak is between 5 and 6. thats always the one to look for.

Best regards

Chris

Tateslikeink · 09-30-2008, 04:48 AM

Quote:

Originally Posted by Supra GuestEXTENDOR

Hi, sounds like the dreaded cylinder head gasket. Sorry.

I did mine as reported almost 6 months ago and all is well. Dont be afraid to have a go yourself.
If you need convincing get a sniff or block test done at your local garage. That is a chemical added to the coolant. If it turns (green I think) then you have exhaust gas in the coolant.

I would not mind a bet that when you do get the head off the leak is between 5 and 6. thats always the one to look for.

Best regards

Chris

Oh dear. Everything i've read here i've done. Block test, thermostat, burping, flush, blah blah blah.. On block test there is no exhaust gases in my cooling system, the car was purging through the overflow and yes, i too got extremely scared about a BHG.. Although i guess its not the problem. I had a coolant leak through my thermostat res,.. fixed that, no more overflow. BUT!!! it still overheats randomly, weirder part.. if i put it in neutral while driving and its overheating, the temp gauge imediately drops to normal operating temp, and stays there.. answer that riddle

suprra_girl · 10-10-2008, 11:22 PM

Had a similar problem, when throttling it would overheat but as soon as i backed off/decelerated it would cool down again, I was leaking between combustion chambers. Have you done a compression check?

Tateslikeink · 10-10-2008, 11:30 PM

Quote:

Originally Posted by suprra_girl

Had a similar problem, when throttling it would overheat but as soon as i backed off/decelerated it would cool down again, I was leaking between combustion chambers. Have you done a compression check?

Yea, the numbers were all over the place. From the 6th cylinder to the 1st everything was weird. 1st was 120 2nd.. i can't remember.. 3rd.. i can't remember, 3rd 145, 4th 155 6th 160. How would one go about fixing this issue if it was a leak between combustion chambers?? Because thats kind of how it is... Except, if i turn the car off, then start it again, its at normal temp.

suprra_girl · 10-10-2008, 11:33 PM

If it's that ALL OVER the place then yes head gasket has fubar'd.

It's not overly common to blow between cylinders, usually you get the water mixing with oil variety.

What work has been done on it? Is it stock or got mhg or what?

Tateslikeink · 10-10-2008, 11:41 PM

Its completely stock. Nothing at all done to it. Its weird because the car runs like a top. Just randomly overheats. Definitely not a all the time deal. Once in a while. And it stopped spewing when i changed the thermostat housing bolts from the leak i acquired from the bolt i broke

suprra_girl · 10-10-2008, 11:48 PM

To verify, I would get the engine warm and do another compression check. Let us know the numbers (so write them down hehe) and we'll go from there. We don't want you pulling off a head unecessarily

Tateslikeink · 10-11-2008, 12:10 AM

ALSO!! I found an exhaust leak.. coming from one of the gaskets between the exhaust manifold and the downpipe.. Could that cause this problem?? The mechanic who did my compression test said it was fine.. I just remember the numbers being weird. It was only cranked for 2 seconds on each cylinder. I didn't think that would give u an accurate reading. And the block test came out clean. All i know is that this problem is very annoying and i can't wait to either fix this issue of get rid of the car.

10-10-2008, 11:22 PM	#3
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	Had a similar problem, when throttling it would overheat but as soon as i backed off/decelerated it would cool down again, I was leaking between combustion chambers. Have you done a compression check? __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

10-10-2008, 11:33 PM	#5
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	If it's that ALL OVER the place then yes head gasket has fubar'd. It's not overly common to blow between cylinders, usually you get the water mixing with oil variety. What work has been done on it? Is it stock or got mhg or what? __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

10-10-2008, 11:48 PM	#7
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	To verify, I would get the engine warm and do another compression check. Let us know the numbers (so write them down hehe) and we'll go from there. We don't want you pulling off a head unecessarily __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

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06-01-2005, 07:18 PM	#1
Supra GuestEXTENDOR Guest Posts: n/a	Hi, sounds like the dreaded cylinder head gasket. Sorry. I did mine as reported almost 6 months ago and all is well. Dont be afraid to have a go yourself. If you need convincing get a sniff or block test done at your local garage. That is a chemical added to the coolant. If it turns (green I think) then you have exhaust gas in the coolant. I would not mind a bet that when you do get the head off the leak is between 5 and 6. thats always the one to look for. Best regards Chris

10-10-2008, 11:41 PM	#6
Tateslikeink Stock Join Date: Sep 2008 Location: Northern, NY Posts: 18	Its completely stock. Nothing at all done to it. Its weird because the car runs like a top. Just randomly overheats. Definitely not a all the time deal. Once in a while. And it stopped spewing when i changed the thermostat housing bolts from the leak i acquired from the bolt i broke

10-11-2008, 12:10 AM	#8
Tateslikeink Stock Join Date: Sep 2008 Location: Northern, NY Posts: 18	ALSO!! I found an exhaust leak.. coming from one of the gaskets between the exhaust manifold and the downpipe.. Could that cause this problem?? The mechanic who did my compression test said it was fine.. I just remember the numbers being weird. It was only cranked for 2 seconds on each cylinder. I didn't think that would give u an accurate reading. And the block test came out clean. All i know is that this problem is very annoying and i can't wait to either fix this issue of get rid of the car.