antifreeze problem

supraquest · 04-08-2011, 02:23 AM

Hi guys got a wierd one i have a 88 7mgte with a prob it is fresh rebuilt head all redone block all redone cometic mls head gasket,arp studs,62-1trim turbo only set at low boost 10 psi till motor is broke in. problem is it blows antifreeze out of over flow tank when i get on it a little bit but no over heat or leaks of any sort did leakdown test with no results????

ochowdero · 04-08-2011, 05:36 AM

Quote:

Originally Posted by supraquest

Hi guys got a wierd one i have a 88 7mgte with a prob it is fresh rebuilt head all redone block all redone cometic mls head gasket,arp studs,62-1trim turbo only set at low boost 10 psi till motor is broke in. problem is it blows antifreeze out of over flow tank when i get on it a little bit but no over heat or leaks of any sort did leakdown test with no results????

your overflow meter is bad i bet...
mine did that, then finally over heated..
so dont be too hard...til its fixed

supraquest · 04-08-2011, 10:48 AM

thanks but dont believe that is it the car is not stock and has no flow meter.

Green7mgte · 04-08-2011, 08:44 PM

1.. quite topping off your rad.
2. check your rad cap.
3. whats the pressure on your rad cap

if you fill your radiator to full, when it expands itl be forced to dump.
when coolant warms it expands and pressed against the spring in the rad cap which opens it up. faulty cap ='s dump.
Filling the rad up to the top row is fine. when cool there should be about 2 inches or so below the neck.

If your puking green then you are overheating and that's the pressures escape rout.
Id replace the thermostat and the rad cap to be safe. Then give it a good Burping.
help me help you.. Do you have heat?
worse case scenario you have a blocked rad creating a flow restriction exudes in a light overheat. Not seen on the temp gauge but is for the ecu.
best case scenario is you just have a bad rad cap. won't hold pressure and just dumps. check that first man Good Luck

supraquest · 04-10-2011, 03:38 PM

its all new radiator cap and thermostat all working properly plus the over flow tank is empty when i start out and it filled it up plus pushed it out but i believe its the head gasket cuz i retorqued the head and it seems to be ok now thanks for the advice.

Green7mgte · 04-11-2011, 12:46 AM

well I was leaving out the headgasket cause you said it was a new one.. never thought to ask "did you re torque it" after a couple cool down cycles. like were suposto.

glad it worked out for you. take care.

04-08-2011, 02:23 AM	#1
supraquest Intake Join Date: Oct 2008 Location: bryan ohio Posts: 31	antifreeze problem Hi guys got a wierd one i have a 88 7mgte with a prob it is fresh rebuilt head all redone block all redone cometic mls head gasket,arp studs,62-1trim turbo only set at low boost 10 psi till motor is broke in. problem is it blows antifreeze out of over flow tank when i get on it a little bit but no over heat or leaks of any sort did leakdown test with no results????

04-08-2011, 08:44 PM	#4
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	1.. quite topping off your rad. 2. check your rad cap. 3. whats the pressure on your rad cap if you fill your radiator to full, when it expands itl be forced to dump. when coolant warms it expands and pressed against the spring in the rad cap which opens it up. faulty cap ='s dump. Filling the rad up to the top row is fine. when cool there should be about 2 inches or so below the neck. If your puking green then you are overheating and that's the pressures escape rout. Id replace the thermostat and the rad cap to be safe. Then give it a good Burping. help me help you.. Do you have heat? worse case scenario you have a blocked rad creating a flow restriction exudes in a light overheat. Not seen on the temp gauge but is for the ecu. best case scenario is you just have a bad rad cap. won't hold pressure and just dumps. check that first man Good Luck __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines : Last edited by Green7mgte; 04-08-2011 at 09:00 PM.

04-11-2011, 12:46 AM	#6
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	well I was leaving out the headgasket cause you said it was a new one.. never thought to ask "did you re torque it" after a couple cool down cycles. like were suposto. glad it worked out for you. take care. __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

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04-08-2011, 10:48 AM	#3
supraquest Intake Join Date: Oct 2008 Location: bryan ohio Posts: 31	thanks but dont believe that is it the car is not stock and has no flow meter.

04-10-2011, 03:38 PM	#5
supraquest Intake Join Date: Oct 2008 Location: bryan ohio Posts: 31	its all new radiator cap and thermostat all working properly plus the over flow tank is empty when i start out and it filled it up plus pushed it out but i believe its the head gasket cuz i retorqued the head and it seems to be ok now thanks for the advice.