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Old 03-11-2013, 11:24 PM   #1
JW06WRX33
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Location: Riverside CA
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06 WRX TR
Aspen White

Default 06 WRX combustion leak test negative and still pushing coolant? HELP UPDATE.. Fixed

Whats up I have a 2006 WRX TR 74,000 miles That is pushing coolant to the overflow tank, on regular drives around town when enough of the coolant gets pushed out the car gets the notorious air bubble in the cooling system causing it to try and overheat ( heater goes cold). I am familiar with burping the system to get heat flowing and the car back on the road. Its the pushing of coolant to the white plastic over flow that is bugging me. I just had water pump / gaskets and all belts and hoses replaced this week. I thought the leaking water pump was responsible for the loss of coolant and the pushing of it.Car runs excellent has tons of power and runs right below half way on the temp gauge. I bought a Combustion leak tester today and ran the test about 5 times 3 different ways and it came back negative the solution stayed completely blue. Anyone experienced this before. I have no oil in coolant or coolant in oil and no smoke or vapor of any kind coming from the exhaust. MODs: ported 16g turbo, HKs Turbo back catless exhaust and HKs muffler, COBB AP stage 2 91octane, AVO 50/50 BOV, spt intake. Any info is much appreciated.
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Last edited by JW06WRX33; 03-12-2013 at 09:04 PM.
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Old 03-11-2013, 11:39 PM   #2
Black94Snake
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12.70 @ 108.4mph

Default

Stupid question... Have you replaced your cap?
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Old 03-11-2013, 11:48 PM   #3
JW06WRX33
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Member#: 349884
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Location: Riverside CA
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06 WRX TR
Aspen White

Default

Quote:
Originally Posted by Black94Snake View Post
Stupid question... Have you replaced your cap?
I have the original round orange oem cap on the radiator, and a high pressure top reservoir cap rated 19+psi
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Old 03-12-2013, 12:15 AM   #4
JW06WRX33
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Location: Riverside CA
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06 WRX TR
Aspen White

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HELLPPPPPP lol
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Old 03-12-2013, 11:46 AM   #5
Davenow
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Quote:
Originally Posted by JW06WRX33 View Post
I have the original round orange oem cap on the radiator, and a high pressure top reservoir cap rated 19+psi
Doesn't mean that high pressure cap is working as intended


But even at that, its only like a 50/50 chance at best that its the cap.

I say this because I would hate to have you go buy a cap and have it not fix anything.


You need to pressure test your cooling system. Don't go ape**** with the tester or you will blow out the o-rings on your radiator. Just pressurize it and inspect the hell out of everywhere. If it isnt holding pressure, and you don't see a leak, have someone start the car and watch for any smoke out of the tailpipe. (unless your coolant is mostly water, in which case it woudn't make smoke)


Pull the cap off, check the condition of the seal and squeeze it a few times to make sure the seal/plate thing can move and move smoothly/not hanging up at all. If its cool, maybe consider replacing the thermostat.

If that doesn't fix it, do the pressure test (or do the pressure test first if you have one handy)


If none of that fixes it and you can't find any leaks, I would be starting to think about the head gaskets.
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Old 03-12-2013, 02:09 PM   #6
JW06WRX33
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Quote:
Originally Posted by Davenow View Post
Doesn't mean that high pressure cap is working as intended


But even at that, its only like a 50/50 chance at best that its the cap.

I say this because I would hate to have you go buy a cap and have it not fix anything.


You need to pressure test your cooling system. Don't go ape**** with the tester or you will blow out the o-rings on your radiator. Just pressurize it and inspect the hell out of everywhere. If it isnt holding pressure, and you don't see a leak, have someone start the car and watch for any smoke out of the tailpipe. (unless your coolant is mostly water, in which case it woudn't make smoke)


Pull the cap off, check the condition of the seal and squeeze it a few times to make sure the seal/plate thing can move and move smoothly/not hanging up at all. If its cool, maybe consider replacing the thermostat.

If that doesn't fix it, do the pressure test (or do the pressure test first if you have one handy)


If none of that fixes it and you can't find any leaks, I would be starting to think about the head gaskets.
Ive bought 4 different radiator caps to test with on the top reservoir, 2 of the same 1.1 caps which a about 16psi, and 2 2.0 caps which are bout 32 psi. the stock oem cap on my radiator could be my culprit. how can air get in the system from any of the caps if they are pressurized from the inside out? wouldnt they leak coolant once up to pressure. Thanks Im going to remove my thermostat today and run the car to see if its still pushing is that a good way to check the thermostat?
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Old 03-12-2013, 02:11 PM   #7
JW06WRX33
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Aspen White

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I just replaced the thermostat with the pump and belts last week..... I asked the mechanic and he said he used an aftermarket thermostat....... from what ive heard they are not as goood as the stock thermostat..... I have to figure it out...
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Old 03-12-2013, 09:11 PM   #8
JW06WRX33
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Aspen White

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Ok so after many hours of thinking and reading... I just bought this car from the original owner he did all the upgrades to the car, the car has a larger turbo meaning the car needs a better and more efficient cooling system to handle the heat. Well the car has bone stock cooling system causing the coolant to boil, i went to my mechanic shop andbhad him gut out my old thermostat and install it to let the car run full cooling all the time. BINGO no more pushing coolant not even a drop! I also went 80/20 on the coolant with water wetter. The problem is diagnosed so now i need a Koyo radiator and upgraded intercooler with a 140 degreee thermostat and ill be Rockin! Alot better than a $3000 repair. So if anyone has any comments please share im fairly new to the scene but owned wrx's in the past and i read alot of forums and pick the best of advice. Thanks to all of you that didnt scream HeadGasket!!!
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Old 03-12-2013, 09:22 PM   #9
Black94Snake
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12.70 @ 108.4mph

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Wow, not even.
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Old 03-12-2013, 10:01 PM   #10
Davenow
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There is zero need to upgrade the cooling system just because it has a larger turbo.

People do 500hp reliably on the completely stock cooling system, reliably, for years on end. Whoever is telling you that the reason it is overheating is because you are on the stock cooling system is either trying to sell you something, or has no idea what they are talking about. Unless you live in death valley or are doing 20 minute long full throttle track day sessions (and DO NOT say "I drive hard so its the same" because it is nowhere near the same), you are fine on the stock cooling system. That is a FACT, not an opinion or guess. If you are having heat issues, something in your cooling system is not working correctly. Replacement is needed, not upgrades. (although if you have to replace something you may as well upgrade I suppose )


The fact that you gutted the thermostat and it fixed the problem, well then you can figure out what (at least part of if not all of) the problem was. Your thermostat was effed up.

Last edited by Davenow; 03-12-2013 at 10:09 PM.
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Old 03-13-2013, 01:26 AM   #11
JW06WRX33
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Member#: 349884
Join Date: Mar 2013
Location: Riverside CA
Vehicle:
06 WRX TR
Aspen White

Default

Quote:
Originally Posted by Davenow View Post
There is zero need to upgrade the cooling system just because it has a larger turbo.

People do 500hp reliably on the completely stock cooling system, reliably, for years on end. Whoever is telling you that the reason it is overheating is because you are on the stock cooling system is either trying to sell you something, or has no idea what they are talking about. Unless you live in death valley or are doing 20 minute long full throttle track day sessions (and DO NOT say "I drive hard so its the same" because it is nowhere near the same), you are fine on the stock cooling system. That is a FACT, not an opinion or guess. If you are having heat issues, something in your cooling system is not working correctly. Replacement is needed, not upgrades. (although if you have to replace something you may as well upgrade I suppose )


The fact that you gutted the thermostat and it fixed the problem, well then you can figure out what (at least part of if not all of) the problem was. Your thermostat was effed up.

No one told me I have to upgrade the cooling system, Ive used 2 brand new OEM thermostats to see if my problem can be solved, The only reason why I even tried the gutted thermostat was to test if the coolant was not getting enough circulation through the system, The turbo IS boiling the coolant whether you think so or not, with the stage 2 tune and the large turbo my wrx just cant cool down the turbo even in normal driving conditions. Ive tried a ton of things to get the car not to push coolant and the only thing that worked was the gutted thermo, that being said im upgrading the cooling system so i have no more issues with the car.
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Old 03-13-2013, 01:27 AM   #12
JW06WRX33
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06 WRX TR
Aspen White

Default

Quote:
Originally Posted by Black94Snake View Post
Wow, not even.
? not even what?
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Old 03-13-2013, 10:15 AM   #13
Black94Snake
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Join Date: Feb 2011
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2007 CGM VF'd WRX
12.70 @ 108.4mph

Default

Quote:
Originally Posted by JW06WRX33 View Post

? not even what?
Thinking that you need an upgraded cooling system to run a large turbo.

You are so wrong that its ridiculous. Bring the car to someone with a clue. Because you don't have one.
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