probs with thermostat

Rock22 · 09-20-2008, 05:04 PM

i think i have a prob with my thermostat. seems after driving the mr2 for about 30 mins i get a bubbling noise coming from the area the coolant overflow is, in the engine bay. i have no loss of boost, i am usually driving on a hot day about 90-100 degrees outside (in vegas) , i wanted to know if i can fix this problem maybe someone else had it or might know whats wrong with my mr2 , first time i noticed this prob my mr2 took a piss and it was all coolant leaking from the middle of where the engine is . i dont seen any oil mixed with the coolant so im thinking its only a melted hose or maybe a loose one , i dont overheat my meter always stays at 1/4 , i havnt had any other leaks for this past week but i still get the bubbling . please help. thanks

Ben · 09-20-2008, 08:18 PM

There might be air in the system

CyFi · 09-20-2008, 08:30 PM

It can be numerous things, start by bleeding the whole system and seeing what happens. If you saw a big leak from " where the middle of the engine is" thats something that needs to be fixed. Where did it leak from? Did you repair it? Did you refill the system? Did you fill it with the proper mix of water/antifreeze? Things we need to know. The stock gauge is hardly accurate, it wont move unless youre really overheating, so be careful not to keep driving it if you see any signs of an issue.

Rock22 · 09-20-2008, 08:39 PM

well i cant see where the leak is coming from but if i had to make an educated guess id say around the hose from hell, under the exhaust mani. i did not repair since it hast leaked since that day and yeah i used 50/50 and put about a cup in cause thats all that came out, im gunna try to buy all the stuff so i can bleed the system sunday. thanks for the info ill keep the thread updated.

CyFi · 09-20-2008, 09:09 PM

I recommend you go down to autozone and get a cooling system pressure test kit, its free, just as a loaner. Just ask them for it, you pay for it upfront and get your money back when you return it. Pressurize the system and confirm where the leak is and fix it!

dmb_jlv · 11-04-2009, 02:44 PM

when you pressurize the system.. how do you know where the leak is..

i have a mr2 also and it continues to overheat and i will constantly have the bubbling sound

muffinman · 11-04-2009, 03:07 PM

Quote:

Originally Posted by dmb_jlv

when you pressurize the system.. how do you know where the leak is..

the leak will be right where the coolant is coming out of.

sounds stupid but it's that easy.

dmb_jlv · 11-04-2009, 03:10 PM

oh lol duh haha wow.. that was a no brainer.. could that be causing the bubble sound and the overflow to bubble out

muffinman · 11-04-2009, 03:15 PM

a leak can cause air to get in the system which could then cause the bubbling. properly fill and bleed the system and see if it leaks.

is your overflow bottle damaged?
what's the condition of your pressure cap?

dmb_jlv · 11-04-2009, 03:22 PM

as far as i know the bottle is ok.. i just changed the radiator cap..

bleeding the system is the same thing changing the coolant right?
so i can look up to how to.. haha

Spooled · 11-04-2009, 05:21 PM

Quote:

Originally Posted by dmb_jlv

as far as i know the bottle is ok.. i just changed the radiator cap..
bleeding the system is the same thing changing the coolant right?
so i can look up to how to.. haha

Yes and no. A bleed should always be part of a change. This is often times also called burping the system too. The idea is to get every last bubble out of the system and some cars can be notoriously hard to do

dmb_jlv · 11-04-2009, 07:11 PM

so should you burp the system like every other day till you know you have all the air out.. just to make sure or is there a way to get it all out

Medusa · 11-04-2009, 08:04 PM

Once you fill the coolant back up, you need to burp it. It's the same idea as bleeding your clutch or your brakes, just slightly more time consuming. You want all the air out of the system.

And as far as burping it every other day - You don't fill your brakes and then just bleed them a little bit every other day till they're good, do you? Do it all at once.

Spooled · 11-05-2009, 09:57 AM

Quote:

Originally Posted by Medusa

Once you fill the coolant back up, you need to burp it. It's the same idea as bleeding your clutch or your brakes, just slightly more time consuming. You want all the air out of the system.

And as far as burping it every other day - You don't fill your brakes and then just bleed them a little bit every other day till they're good, do you? Do it all at once.

great point! OP if you have more to burp the next day then you f'ed up. Do it all at once untill every single last bubble is gone, and like Medusa said it can be time consuming. On average for our cobras it take 30-45 minutes just to properly burp the entire system...

dmb_jlv · 11-05-2009, 10:51 AM

so just put it up on jacks and then burp it and then go back and put more water in and try it again until all that comes out is water??

09-20-2008, 05:04 PM	#1 (permalink)
Rock22 No Skills Join Date: Sep 2008 Posts: 17 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	probs with thermostat i think i have a prob with my thermostat. seems after driving the mr2 for about 30 mins i get a bubbling noise coming from the area the coolant overflow is, in the engine bay. i have no loss of boost, i am usually driving on a hot day about 90-100 degrees outside (in vegas) , i wanted to know if i can fix this problem maybe someone else had it or might know whats wrong with my mr2 , first time i noticed this prob my mr2 took a piss and it was all coolant leaking from the middle of where the engine is . i dont seen any oil mixed with the coolant so im thinking its only a melted hose or maybe a loose one , i dont overheat my meter always stays at 1/4 , i havnt had any other leaks for this past week but i still get the bubbling . please help. thanks

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09-20-2008, 08:18 PM	#2 (permalink)
Ben Same In The End Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 4,026 Thanks: 18 Thanked 283 Times in 265 Posts My Google Map iTrader Rating: (11/100% )	There might be air in the system

09-20-2008, 08:30 PM	#3 (permalink)
CyFi Shoulda put a ring on it Join Date: Oct 2005 Location: Phoenix Posts: 1,398 Thanks: 12 Thanked 38 Times in 35 Posts iTrader Rating: (11/100% )	It can be numerous things, start by bleeding the whole system and seeing what happens. If you saw a big leak from " where the middle of the engine is" thats something that needs to be fixed. Where did it leak from? Did you repair it? Did you refill the system? Did you fill it with the proper mix of water/antifreeze? Things we need to know. The stock gauge is hardly accurate, it wont move unless youre really overheating, so be careful not to keep driving it if you see any signs of an issue.

09-20-2008, 08:39 PM	#4 (permalink)
Rock22 No Skills Join Date: Sep 2008 Posts: 17 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	well i cant see where the leak is coming from but if i had to make an educated guess id say around the hose from hell, under the exhaust mani. i did not repair since it hast leaked since that day and yeah i used 50/50 and put about a cup in cause thats all that came out, im gunna try to buy all the stuff so i can bleed the system sunday. thanks for the info ill keep the thread updated.

09-20-2008, 09:09 PM	#5 (permalink)
CyFi Shoulda put a ring on it Join Date: Oct 2005 Location: Phoenix Posts: 1,398 Thanks: 12 Thanked 38 Times in 35 Posts iTrader Rating: (11/100% )	I recommend you go down to autozone and get a cooling system pressure test kit, its free, just as a loaner. Just ask them for it, you pay for it upfront and get your money back when you return it. Pressurize the system and confirm where the leak is and fix it!

11-04-2009, 02:44 PM	#6 (permalink)
dmb_jlv Some Skills Join Date: Nov 2009 Location: South Carolina Posts: 64 Thanks: 2 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	when you pressurize the system.. how do you know where the leak is.. i have a mr2 also and it continues to overheat and i will constantly have the bubbling sound

11-04-2009, 03:10 PM	#8 (permalink)
dmb_jlv Some Skills Join Date: Nov 2009 Location: South Carolina Posts: 64 Thanks: 2 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	oh lol duh haha wow.. that was a no brainer.. could that be causing the bubble sound and the overflow to bubble out

11-04-2009, 03:15 PM	#9 (permalink)
muffinman Brain Surgeon Join Date: Jan 2008 Location: Ft. Lauderdale Posts: 2,191 Thanks: 28 Thanked 119 Times in 116 Posts My Google Map iTrader Rating: (1/100% )	a leak can cause air to get in the system which could then cause the bubbling. properly fill and bleed the system and see if it leaks. is your overflow bottle damaged? what's the condition of your pressure cap?

11-04-2009, 03:22 PM	#10 (permalink)
dmb_jlv Some Skills Join Date: Nov 2009 Location: South Carolina Posts: 64 Thanks: 2 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	as far as i know the bottle is ok.. i just changed the radiator cap.. bleeding the system is the same thing changing the coolant right? so i can look up to how to.. haha

11-04-2009, 07:11 PM	#12 (permalink)
dmb_jlv Some Skills Join Date: Nov 2009 Location: South Carolina Posts: 64 Thanks: 2 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	so should you burp the system like every other day till you know you have all the air out.. just to make sure or is there a way to get it all out

11-04-2009, 08:04 PM	#13 (permalink)
Medusa Cage Fighter Join Date: Sep 2008 Location: Reno, NV Posts: 681 Thanks: 9 Thanked 13 Times in 13 Posts iTrader Rating: (0/0% )	Once you fill the coolant back up, you need to burp it. It's the same idea as bleeding your clutch or your brakes, just slightly more time consuming. You want all the air out of the system. And as far as burping it every other day - You don't fill your brakes and then just bleed them a little bit every other day till they're good, do you? Do it all at once.

11-05-2009, 10:51 AM	#15 (permalink)
dmb_jlv Some Skills Join Date: Nov 2009 Location: South Carolina Posts: 64 Thanks: 2 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	so just put it up on jacks and then burp it and then go back and put more water in and try it again until all that comes out is water??