1993 Mazda MX3 Oil In Air Breather

WEAKND_KNEES

MEMBER
1993 MAZDA MX3
6 CYL
FWD
AUTOMATIC
160,000 MILES

I have already changed out my PCV valve. And I have oil coming into my air breather. I have wiped it out a couple of days ago. Oil just seems to return. My throttle body has oil caked in there also. WHY?

Tuesday, August 5th, 2008 AT 9:21 PM

1 Reply

MHPAUTOS

MECHANIC
31,938 POSTS

Hi there,

I would be checking foe excessive engine blow by, that is compression leaking past the rings and over pressurizing the sump, this will carry excessive atomized oil out through the PCV and into the induction system, have a leak down test done first.

Mark (mhpautos)

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