air filter SOAKED in oil

bcmaxx · Feb 14, 2010

Buddy of mine just got rid of his tj for an 88 xj with a 4.0 , he just noticed a lot of oil on the drivers inner fender, turns out the air filter is fricken soaked with oil and its pouring out the air box. Ive have read some on the baffling on the inside of the valve cover getting plugged. Is this normal and can be fixed or way excessive blow-by and we should be scouting out an engine?

MT Mike · Feb 14, 2010

http://www.naxja.org/forum/showthread.php?t=1023926&highlight=blowby

This thread is a good start. Search here for "blow by", "oil in air filter", etc. Also try the same searches on Google. Tons of good info out there, all of which usually point to plugged CCV lines or grommets (or both). If they are plugged, I'd recommend to your friend to pull the valve cover and do a thorough cleaning of the entire valve cover.

Johnnie Walker · Feb 14, 2010

Some do an inline filter from the valve cover to airbox.. could try that and see how much oil it filters.

bcmaxx · Feb 14, 2010

Johnnie Walker said:
Some do an inline filter from the valve cover to airbox.. could try that and see how much oil it filters.

what kind of filter would this be?

Johnnie Walker · Feb 14, 2010

Same kind/similar type of filter used for air compressors to help keep water out. I believe if you search you will find threads with pics.

joe_peters · Feb 14, 2010

Before a**uming blowby, try servicing the CCV system, one of the most neglected systems on the XJ, and IMHO the root cause of more blowby complaints than actual mechanical wear in the engine.

cruiser54 · Feb 14, 2010

Joe's right.Read the link provided above. For starters, you can buy the rear hose and grommet for only 8 bucks at Napa.

birchlakeXJ · Feb 14, 2010

joe_peters said:
Before a**uming blowby, try servicing the CCV system, one of the most neglected systems on the XJ, and IMHO the root cause of more blowby complaints than actual mechanical wear in the engine.

Agreed. I had it on my 88 Comanche 4.0 at around 80k and was able to resolve it by cleaning the CCV system. Here's an article (there are many articles that delve into this) that gets into causes and fixes.

http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=257985

xcm · Feb 14, 2010

you may need one of these, assuming youve gone thru your lines and theres no clog.

1988 Cherokoo · Feb 14, 2010

Pluuged valve cover grommet. Be sure you can blow air with your mouth through the lines, then spit out oil. Thats what I did. I also replaced all hoses.

kujito · Feb 15, 2010

Or you could just use some compressed air. Tastes better.

air filter SOAKED in oil

bcmaxx

NAXJA Forum User

MT Mike

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Johnnie Walker

Piece of Fish!

bcmaxx

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Johnnie Walker

Piece of Fish!

joe_peters

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cruiser54

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birchlakeXJ

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xcm

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1988 Cherokoo

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kujito

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