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Old 09-01-2003, 06:00 PM   #1
cky211
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Member#: 31129
Join Date: Dec 2002
Chapter/Region: NWIC
Location: Spokane WA
Vehicle:
02 WRX MPB
No TGV + lots of P&P

Default Oil leaking from my Intercooler 02 WRX 9000 miles

Quick background on my car & me
I have attended one 2-day HP driving school and consider myself a beginner. I’m still running stock suspension and tires. I have also attended 2 open track days with further instruction. I have a 02 WRX catless w/ Greddy Evo

I was checking fluid levels before heading out to the track. I found it odd that my oil was down about half way. Ever other time I have checked it, it was at the top mark on the dipstick. The oil had been in the car for 1200 miles Four days on the road course at SRP and very little street driving. After closer inspection I found signs of oil on the Y pipe under Intercooler and the short connector to the throttle body. I then found 3 sources of oil into the intake coming from the engine. So now I know how it got there.
So I figure that driving hard at the track and taking the corners at the “limits of adhesion” throw the oil around inside the engine and cause it to make its way into the intake.
So my question is do I need to clean out the turbo and intercooler? Is there an alternative to the overpriced oil catch cans out there?


-Scott

SRP http://www.spokaneracewaypark.com/Roadcourse/info.html
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Old 09-01-2003, 06:07 PM   #2
T-WRX
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Oil will make its way into the intake system via the EGR. The oil from the turbo and piston walls doesn't burn up, and makes it way out the exhaust. Fine particulate will ultimately coat the interior of the intercooler and hoses. It is normal.

Some people with upgraded components will purchase an oil catch system (perrin, greddy, cusco) to remove the fine oil particulate from the intake. This supposedly can reduce the potential for detonation.

Observing oil on the edges of your hose connections is not necessarily a bad thing. If it is literally dripping off, then you have a problem. But if it is just a fine coating covered with road grime, you have nothing to worry about.
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Old 09-01-2003, 06:10 PM   #3
Mulder
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15 WRX/05 GTO

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No EGR on the WRX, you are referring to the crankcase ventilation system.
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Old 09-01-2003, 06:21 PM   #4
T-WRX
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Hmmm . . . I am not knowledgable enough to know the difference.

Here is a reference from the service manual that includes "EGR." post from subaruparts.com

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Old 09-01-2003, 06:27 PM   #5
Mulder
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If you look under Impreza 2.5RS it shows the same picture. It's a mistake, the RS has EGR but the WRX doesn't.
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Old 09-01-2003, 08:34 PM   #6
cnk
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You are just experiencing oil blow by, which is normal if you really drive the car hard. There are 2 crank case vents as well as the PCV valve that vent back into the intake track. When you drive the car hard, oil vapors get into the intake track and that is what you're seeing. The easy answer is to get an oil catch can. You can get a Greddy unit for around $100 and then add some baffling material or you can go the SPO route for $200 which comes as a full solution with a baffled can.

Calvin
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Old 09-01-2003, 11:29 PM   #7
cky211
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Join Date: Dec 2002
Chapter/Region: NWIC
Location: Spokane WA
Vehicle:
02 WRX MPB
No TGV + lots of P&P

Default

Thanks for the info everyone.



-Scott
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