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Go Back   IWSTI.com: Subaru WRX STI Forums > IWSTI Engine & Drivetrain > 2.5 Liter/Litre Factory Motor


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Old 05-17-2008, 08:06 AM   #16
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Car: Pearl Wht 07 STI
Fav Mod: SR56 turbo & Rays 18"
Location: East Stroud, PA
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Talking Re: bov oil?

I took the FMIC off and cleaned the IC-piping, BOV & throttle body. There was about quarter pint of oil in my FMIC. Enought to effect my AF ratio and make it run like crap. After I cleaned it it runs a lot better. If you have the same problem think about running an oil catch can. I'm going to get one soon. For now, the problem is fixed!


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Old 05-17-2008, 11:57 AM   #17
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Car: black 04 sti
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Location: Sterling heights, MI
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Default Re: bov oil?

Quote:
Originally Posted by STi Str8 Beast View Post
I took the FMIC off and cleaned the IC-piping, BOV & throttle body. There was about quarter pint of oil in my FMIC. Enought to effect my AF ratio and make it run like crap. After I cleaned it it runs a lot better. If you have the same problem think about running an oil catch can. I'm going to get one soon. For now, the problem is fixed!
Hi again.I just did mind today. i had pretty much oil where the ic pipe connect too the turbo. it was dripping out when i took it off is this good or bad?there was oil in the manifold too when i had took off the throttle body?could it be a bad turbo seal?????
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Old 05-18-2008, 11:47 PM   #18
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Car: Pearl Wht 07 STI
Fav Mod: SR56 turbo & Rays 18"
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Default Re: bov oil?

What mods do you have done? Do you beast on your car a lot, drive hard at rpm's? If so that's why you're getting more oil vapor than average. Clean it all out, and look into a oil catch tank. Cusco, Perrin, Greddy & who else, Crawford is probably the best one but it's expensive but the difference is that it's supposed to return the oil back to the engine instead of wait for you to empty it out.

Oh as far as all the oil you found inside you Throttle body & Intake Manifold, that exactly where all the oil is coming from. It sits right on top of the valve covers under the Intake Manifold and then when you run boost and your BOV goes off it spray the oil out.

I was told that it's normal, the STI engine is design to run that way to lubicate the turbine with oil vapors. Thats probably why our owner's manual says to check your oil everytime you fill up on gas!
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Old 05-19-2008, 01:32 AM   #19
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Default Re: bov oil?

Yea i do beat on it once and awhile.on friday night out racing u no how that go.but my mod are fpgreen -fmic-header-pe injecter-perrin inlet-utec.hks bov-.now i see its normal too get oil like that huh i guess there shouldnt be anything to worry about.anyway if it was my piston ring or the turbo seal that went bad how would u no?
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Old 05-19-2008, 07:17 AM   #20
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Default Re: bov oil?

The only way to tell whether the pistons & rings are good is to do a compression test cost like $130 to find out if all the cyclinders are at the right compression rate.
But if the car is running good don't worry about it. Just look into the Oil Catch can, I need one too now!


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