Question about 2000 Ford Escort

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I have oil in my air intake. What would cause that?

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If it's a relatively small amount then it's normal: the crankcase breather vents oily fumes back into the air intake to be burnt off by the engine as a normal anti-pollution measure.

Larger amounts may mean that the crankcase ventilation system (pcv valve) needs cleaning or replacing (very common), or if the engine has endured high mileage or frequent short journeys then it may indicate worn piston rings or cylinder bores. A dry compression test followed by a wet test will confirm if there is wear in that part of the engine, but if it still runs well and passes emissions tests then repairs are an expensive luxury.

Posted on Aug 03, 2010

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Posted on Jan 02, 2017

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