2004 Mazda 6 oil in air filter

KASTONE62

MEMBER
2004 MAZDA 6
6 CYL
FWD
AUTOMATIC
117,000 MILES

I had my oil changed and they found the air filter had oil on it. What would cause this?

Saturday, July 18th, 2009 AT 8:52 PM

1 Reply

MHPAUTOS

MECHANIC
31,938 POSTS

Hi there,

This is normally due to excessive crank case pressure, have a leak down test done to check ring condition and get the PCV valve changed, start here.

Mark (mhpautos)

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