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Old 04-25-2013, 07:10 PM   #1
revD
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Member#: 270705
Join Date: Jan 2011
Default Huge oil burn after new motor.

So I recently had my longblock replaced (stock with forged pistons) and have had an oil burning problem ever since, I looked at the turbo and its dry does not seem to be leaking, loooked intercooler and very light bit of oil, nothing massive.

Problem is car is burning 1qt of oil every ~400miles whether car is driven hard or crusing.

Compression#'s by a shop after 7,000miles on engine:
#1: 140psi / 9%
#2: 128psi / 14%
#3: 148psi / 8%
#4: 130psi / 14%


Anything else to look at? people say PCV but could it really burn that much from PCV, would it have oil all in intercooler if so? compression numbers dont look good....
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Old 04-25-2013, 07:40 PM   #2
corvallisbattery
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Member#: 333030
Join Date: Sep 2012
Chapter/Region: NWIC
Location: Corvallis, OR
Vehicle:
'05 WRX
PSM

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Compression and leak down both don't look good
I know it sounds crazy but I JUST put an sti back together today that had the same symptoms..

Turned out the customer replaced the short block and didn't go back and re torque his heads after 2000mi. Some will say its not needed... but in this case the head lifted ever so slightly and created and EXTERNAL head gasket leak. Compression and leak down on that side were 120psi. 13% leak. Sound familiar? Keep is posted
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Old 04-25-2013, 07:41 PM   #3
revD
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holy crap... hmmm
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Old 04-25-2013, 07:48 PM   #4
Shadow4
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Join Date: Mar 2013
Location: Western North Carolina
Vehicle:
2002 Impreza WRX HB
Silver

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This may be what was wrong with mine. I have an EJ257 swapped into my 02 WRX, but it had been rebuilt about 5000 miles back with forged pistons, and I was having the exact same problem. (It's now being rebuilt because it threw a rod) I don't know what my compression was looking like, but I was burning through oil like crazy. I'll be sure to go back and retorque everything after 2000 miles when I'm done.
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Old 04-25-2013, 07:57 PM   #5
revD
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and if it was PCV the outlet of the turbo into the intercooler would be wet with oil right?
or if clogged could it force oil oil of piston rings inside motor?
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