Overflowing Resevoir

Drag0na5h · 07-20-2006, 06:13 PM

About 2 years ago a new motor was put into my Supra (7mge) and since then noticed difficult starting no matter what time of day. Also I noticed white smoke on start up after installing an aftermarket exhaust. It's possible I had this white smoke problem before with the stock exhaust, but I notice it a whole lot more frequently now. Eversince summer began about two months ago I noticed that after driving home from work (15 min on Freeway) my car would immediately spit out hot coolant from the overflow resevoir tank after turning off the engine. The weather here has been around 90-100+ and my cars thermostat reads normal right below the middle mark. I recently changed the coolant temperature sensor and my oil. I didn't notice any milky residue in the oil then or now. I'm constantly filling up my resevoir tank to the full mark almost everyday (if I drive far). What could be causing this?

theWeezL · 07-20-2006, 07:08 PM

bad radiator cap...its not holding the pressure.

Either that or a BHG

damdog05 · 07-20-2006, 08:12 PM

when mine did that i had a BHG. i had the exactly sympyoms your are describing. but im praying for your sake its just the radiator cap oe something else.

marc · 07-21-2006, 02:40 AM

i had sum of the same symptoms AND DROVE WITH IT. turns out my water pump was trashed and it eventually ripped open my radiator. after i fixed this i also realized my thermostat was also to blame. try replacing these..then see. thermostat was like 4$ and the water pump was 45$

damdog05 · 07-21-2006, 03:19 AM

try a compression test first...itll tell you whether you have a bhg or not. if you do youll replace all that stuff as you do it. if not you can replace that stuff anyway

Drag0na5h · 07-21-2006, 08:09 AM

Alright thanks for the suggestions! Will try them out as soon as possible. Oh I forgot to mention. After the white smoke started becoming very noticeable, I checked around my exhaust manifold for any coolant leaks...and there was one right behind the water pump. I noticed coolant resting on the flat surfaces of the engine as well as wetness leading to or near the water pump. I'll check that again tomorrow because I had initially believed a faulty water pump or wp gasket was the reason for this. At that time my coolant wasn't overflowing out of the resevoir tank. Perhaps my problem has gotten worse since then.

OK overflowing problem solved. New radiator cap from Toyota did the trick.

damdog05 · 07-22-2006, 06:54 PM

awesome....thats the best thing that could have happened. im glad it wasnt a bhg. enjoy.

theWeezL · 07-22-2006, 09:45 PM

Quote:

Originally Posted by Drag0na5h

OK overflowing problem solved. New radiator cap from Toyota did the trick.

Its very commonly overlooked...I guess cause most people just see it as a stopper, but they have rated pressures for a reason.

Drag0na5h · 07-23-2006, 01:58 AM

Yeah it's surprising to me because I had the radiator and cap all changed brand new a few years ago. The rubber ring on the cap does have a damaged edge and I can see a lot of rubber residue on the spring. Again thanks!

07-20-2006, 06:13 PM	#1
Drag0na5h 3" Exhaust Join Date: Jul 2005 Posts: 67	Overflowing Resevoir About 2 years ago a new motor was put into my Supra (7mge) and since then noticed difficult starting no matter what time of day. Also I noticed white smoke on start up after installing an aftermarket exhaust. It's possible I had this white smoke problem before with the stock exhaust, but I notice it a whole lot more frequently now. Eversince summer began about two months ago I noticed that after driving home from work (15 min on Freeway) my car would immediately spit out hot coolant from the overflow resevoir tank after turning off the engine. The weather here has been around 90-100+ and my cars thermostat reads normal right below the middle mark. I recently changed the coolant temperature sensor and my oil. I didn't notice any milky residue in the oil then or now. I'm constantly filling up my resevoir tank to the full mark almost everyday (if I drive far). What could be causing this?

07-20-2006, 07:08 PM	#2
theWeezL 12psi boost Join Date: May 2006 Location: Oregon Posts: 376	bad radiator cap...its not holding the pressure. Either that or a BHG __________________ *____________* *Eagles may soar, but weezl's never get sucked into jet engines!*

07-20-2006, 08:12 PM	#3
damdog05 12psi boost Join Date: Apr 2006 Location: Georgia Posts: 250	when mine did that i had a BHG. i had the exactly sympyoms your are describing. but im praying for your sake its just the radiator cap oe something else. __________________ My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone

07-21-2006, 02:40 AM	#4
marc 12psi boost Join Date: Jun 2006 Location: salem mass Posts: 329	i had sum of the same symptoms AND DROVE WITH IT. turns out my water pump was trashed and it eventually ripped open my radiator. after i fixed this i also realized my thermostat was also to blame. try replacing these..then see. thermostat was like 4$ and the water pump was 45$ __________________ nothing but the best -mods- so far K&N intake fipk 3" megan downpipe 3"turbo elbow 4 washers on the wastegate highflow cat short shifter 89+ front bumper, pic soon to come many more upgrades soon

07-21-2006, 03:19 AM	#5
damdog05 12psi boost Join Date: Apr 2006 Location: Georgia Posts: 250	try a compression test first...itll tell you whether you have a bhg or not. if you do youll replace all that stuff as you do it. if not you can replace that stuff anyway __________________ My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone

07-21-2006, 08:09 AM	#6
Drag0na5h 3" Exhaust Join Date: Jul 2005 Posts: 67	Alright thanks for the suggestions! Will try them out as soon as possible. Oh I forgot to mention. After the white smoke started becoming very noticeable, I checked around my exhaust manifold for any coolant leaks...and there was one right behind the water pump. I noticed coolant resting on the flat surfaces of the engine as well as wetness leading to or near the water pump. I'll check that again tomorrow because I had initially believed a faulty water pump or wp gasket was the reason for this. At that time my coolant wasn't overflowing out of the resevoir tank. Perhaps my problem has gotten worse since then. OK overflowing problem solved. New radiator cap from Toyota did the trick. Last edited by Drag0na5h; 07-21-2006 at 08:32 PM.

07-22-2006, 06:54 PM	#7
damdog05 12psi boost Join Date: Apr 2006 Location: Georgia Posts: 250	awesome....thats the best thing that could have happened. im glad it wasnt a bhg. enjoy. __________________ My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone

07-23-2006, 01:58 AM	#9
Drag0na5h 3" Exhaust Join Date: Jul 2005 Posts: 67	Yeah it's surprising to me because I had the radiator and cap all changed brand new a few years ago. The rubber ring on the cap does have a damaged edge and I can see a lot of rubber residue on the spring. Again thanks! __________________

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