oil in air filter

1989 JEEP CHEROKEE
187,000 MILES • 6 CYL • 4WD • AUTOMATIC
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CASO
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Hello, I have a 1989 jeep cherokee with a 4.0 that leaks oil out of the valve cover into the air box and at idle knocks some. What could this be? Thanks Caso
Apr 17, 2011 at 9:15 PM
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WRENCHTECH
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Sounds like a worn out engine. The oil is from compression blowby and the knocking could be anything but usually serious.
Apr 17, 2011 at 9:35 PM
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CJ MEDEVAC
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EVEN WITH THE BLOWBY, THE PCV SYSTEM MAY NOT BE WORKING CORRECTLY/ OR NOT EVEN HOOKED UP.

CHECK IT OUT, IF YOU NEED HELP, LET US KNOW!

THE MEDIC
Apr 17, 2011 at 10:51 PM
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WRENCHTECH
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The PCV isn't causing the engine to knock.
Apr 17, 2011 at 10:53 PM