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-   -   Need help! Overheating (http://www.toyota-supra.info/forums/mkiii-supra/17567-need-help-overheating.html)

vbryanv 08-08-2010 11:48 PM

Need help! Overheating
 
Need help. Today i stoped at the store nd when i shut my car off i heard a boiling sound from under the hood. I poped the hood and the coolant in the overflow was boiling. Also from the engine on the intake side i heard boiling as well. I went in the store for about an hour came out and drove home. About 5-10 mins down the road i notice the gauge was almost pinned hot. Since i got this car i've had coolant issues. 1. Blew the coolant hose going to the throttle body. 2. T-stat housing leaking 3. Blew a freeze out plug on the exhaust side of the engine. Also replace rad cap. I'm hoping i don't have a bhg. Any suggestions..

Green7mgte 08-09-2010 03:58 AM

purchase a rad pressure tester and see were your leaking from

CanadianBak'inSupra 08-09-2010 05:08 AM

check:
for milky oil under your oil fill cap
for oil in your antifreeze
for white smoke in your exhaust

there are many things that can indicate a bhg

is your car stock??
what year and turbo or no??

CanadianBak'inSupra 08-09-2010 05:12 AM

also if you overheat
DO NOT USE COLD WATER TO FILL YOUR RAD.
you could risk cracking the block and or head...

vbryanv 08-11-2010 03:03 AM

No coolant in engine or oil in coolant. Cap looks good. No smoke from exhaust. I noticed I see some dried coolant on the intake side of the engine. Can't see where its coming from thought. The intake is in the way. It by cyl 1 or 2. Think I'm leaking coolant again and it went low causing me to overheat. Anbody got any ideas. Maybe tomorrow I'll take the intake off and try to see what's going on.

Green7mgte 08-11-2010 09:33 PM

rad pressure tester.. go rent one from autozone or buy one.. its like 60 bucks.. they pressurize your system. *do not go above 13psi* and you can actually watch to see where its leaking from.

CanadianBak'inSupra 08-11-2010 11:45 PM

Quote:

Originally Posted by Green7mgte (Post 86740)
rad pressure tester.. go rent one from autozone or buy one.. its like 60 bucks.. they pressurize your system. *do not go above 13psi* and you can actually watch to see where its leaking from.

i second that.
i thought id just get him to check the obvious first.

if you get down to work, you can, from the cheapest thing to the most expensive, and find your problems quickly.

MJG 08-12-2010 03:33 AM

Left front corner of block, sounds like a head gasket. I don't remember if a freeze plug is in that neighborhood, which could be the issue.

cre 08-12-2010 03:45 AM

No, front left by cyls 1 and 2 is most likely one of the hoses in the small coolant circuit which runs from the rear up to the TB, out of the TB to the ISCV, from the ISCV back into the block via a port on the underside of the intake between cyls 1 and 2. If there is no sign of coolant on tp of the lower plenum then inspect the hose running from the ISCV to the return port and then failing that replace the lower plenum's gasket.

vbryanv 08-14-2010 03:19 AM

damn this car!!! LOL. 2 freeze out plugs with pin holes. any ideas y i'm having so many coolant issues. duing removal of intake fond egr pipe not even conected... pipe damaged... also radiator leaking..:roflwtf:

Green7mgte 08-14-2010 03:21 AM

its a 20 year old car.. and people drive the crap out of them.. do yourself a favor and replace all the coolant hoses at the same time.. not one at a time when they blow like i did...

vbryanv 08-18-2010 03:56 AM

MORE PROBLEMS egr?
 
ok so now i come to find out i need a radiator. gonna have to wait till next month on that one.

but i want to fix the egr problem.... by deleting it.
my only question is i read people thinking they would have to take the head off in order to intall the plates and my leak is on the block on the intake side?? can i just block the intake side of the block and the intake mainfold.

is there anything on the back of the head that i have to block?

Green7mgte 08-18-2010 05:07 AM

i wouldnt delete the egr.. it does your car good. like milk for the exhaust system. makes your body cold and grow up strong..

afsvanderveen 08-19-2010 12:03 AM

u may have checked already but check the thermostat. If its stuck closed it will cause an overheating problem, then that leads to leaks and so on. Wrong temp thermostat can do the same thing if its really hot where you are.also i would suggest a system flush in case there are any blockages. As the coolant system like to build scale and will cause havock if left to long.One more thing, unfortunately in our cars if you have had a overheating problem and its been serious, chances are you have a bhd

cre 08-19-2010 01:13 AM

Test the thermostat in a pot of water on the stove and use a thermometer to make sure it's opening at the right temp. Details are in the TSRM.

Burt21 08-19-2010 02:23 AM

Hmm quite the pickle you have there. Having your egr hooked up will definitely help cool things down in your cylinders and take care a pesky nox. Are you having any probs with your cooling fans at all?

Green7mgte 08-19-2010 03:33 AM

off topic..

lima ohio.. whats up man! canton here!

on topic.

overheating issues.. rad cap. thermostat.. leaking lines.. bhg + many more.
start at the top and work your way down.

Green7mgte 08-19-2010 03:36 AM

Quote:

Originally Posted by cre (Post 86779)
runs from the rear up to the TB, out of the TB to the ISCV, from the ISCV back into the block.


the neck bone connected to the... shoulder bone.. shoulder bone connected to the.....

has this been checked up on?

gloreboy89 08-19-2010 08:18 PM

o man why does it have to be so simular to my problem? lol About a month ago I bought my first car. An '88 supra with a 7mge engine. anyway it overheated on me on my 2hr drive back home and i(my mechanic, i gave up) found out the radiator wasn't pumping out enough coolant at higher rpms. so I switched out the radiator with a all metal one and changed the clutch fan for added safety. As of now i have no heating problems.:crazy2:


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