Help... my car is overheating

ghost88 · 02-25-2009, 04:51 AM

im not an expert but im almost sure you have a head gasket leak because thats the only way it would get into the exhaust that i know of. so basically if it hasn't been replaced its going to need to be replaced. also in the mean time you have to check your rad fluid level every time it is cool berfore you drive and make sure when you look in to the radiator you can see some some fluid(don't fill to the complete top of cap) you can no longer trust your reservoir and must baby/nurse your car until you replace the gasket.

when you see your needle bouncing it means your down to your last quart of fluid and need to pull over. Get a pressure release cap so you can bleed the pressure off instead of waiting 45 minutes for it to cool........ugh im having flashbacks, i need a drink.

87MK111Supra · 02-25-2009, 05:04 AM

Alright, well thanks for the tips. I think I'm gonna dive in and do this head gasket job this weekend, any tips on doing it? Are there steps or guidelines I should go by?

ghost88 · 02-26-2009, 04:55 AM

i havent done a scientific study but i feel that PEAK Global antifreeze for import cars seems to work alot better than prestone just an observation. also here are some posts on the topic that might help.

http://www.toyota-supra.info/forums/...ir-w-pics.html

http://www.toyota-supra.info/forums/...et-repair.html

http://www.toyota-supra.info/forums/...-symptoms.html

Supra Saiyan · 07-11-2010, 06:51 AM

My M/T NA 88 MK3 had its gasket replaced, got a new thermostat. The order of events was gasket replace, had a leak in a rad hose, didn't realize, put in some radiator stop leak I bought from a 7/11 store, It helped for a day, next day I filled my radiator up before I started to drive it for the day (50/50 mix), Coolant was spit from the radiator into my reserve tank, the tank will here and there have some of the leak stop stuff in it (The leak stuff is about 4 months old in there), took it into the shop, shop said leaky hose, fixed that, coolant would no longer drip down, nor would AS MUCH of it back up into the reserve tank, now ONLY if I drive it real hard it will push it all into the reserve tank and start to over heat. Why is this happening, I don't see the stop leak stuff coming up any longer, the car won't over heat and push the coolant to the reserve tank unless I abuse the rpms at every light.

Any reason why it would do this? No more leaks, just doing things backwards. However I can smell the coolant sweet smell when I drive it a mile. Stop at my destination and come back to find no leaks on the ground.

02-25-2009, 04:51 AM	#1
ghost88 Stock Join Date: Dec 2008 Location: USA Posts: 14	almost 99% sure thats a headgasket leak im not an expert but im almost sure you have a head gasket leak because thats the only way it would get into the exhaust that i know of. so basically if it hasn't been replaced its going to need to be replaced. also in the mean time you have to check your rad fluid level every time it is cool berfore you drive and make sure when you look in to the radiator you can see some some fluid(don't fill to the complete top of cap) you can no longer trust your reservoir and must baby/nurse your car until you replace the gasket. when you see your needle bouncing it means your down to your last quart of fluid and need to pull over. Get a pressure release cap so you can bleed the pressure off instead of waiting 45 minutes for it to cool........ugh im having flashbacks, i need a drink.

02-26-2009, 04:55 AM	#3
ghost88 Stock Join Date: Dec 2008 Location: USA Posts: 14	also antifreeze brand may help/other posts i havent done a scientific study but i feel that PEAK Global antifreeze for import cars seems to work alot better than prestone just an observation. also here are some posts on the topic that might help. http://www.toyota-supra.info/forums/...ir-w-pics.html http://www.toyota-supra.info/forums/...et-repair.html http://www.toyota-supra.info/forums/...-symptoms.html

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02-25-2009, 05:04 AM	#2
87MK111Supra 3" Exhaust Join Date: Jan 2009 Location: San Diego Posts: 50	Alright, well thanks for the tips. I think I'm gonna dive in and do this head gasket job this weekend, any tips on doing it? Are there steps or guidelines I should go by?

07-11-2010, 06:51 AM	#4
Supra Saiyan 3" Exhaust Join Date: Feb 2010 Location: Oregon Posts: 225	My M/T NA 88 MK3 had its gasket replaced, got a new thermostat. The order of events was gasket replace, had a leak in a rad hose, didn't realize, put in some radiator stop leak I bought from a 7/11 store, It helped for a day, next day I filled my radiator up before I started to drive it for the day (50/50 mix), Coolant was spit from the radiator into my reserve tank, the tank will here and there have some of the leak stop stuff in it (The leak stuff is about 4 months old in there), took it into the shop, shop said leaky hose, fixed that, coolant would no longer drip down, nor would AS MUCH of it back up into the reserve tank, now ONLY if I drive it real hard it will push it all into the reserve tank and start to over heat. Why is this happening, I don't see the stop leak stuff coming up any longer, the car won't over heat and push the coolant to the reserve tank unless I abuse the rpms at every light. Any reason why it would do this? No more leaks, just doing things backwards. However I can smell the coolant sweet smell when I drive it a mile. Stop at my destination and come back to find no leaks on the ground.