I've noticed that there is a humming sucking sound coming from the engine after I go for a drive. It is coming from the oil cap. When I remove the cap, the noise goes away, and the idle speeds up some. If I put the cap close to the opening, it is pulled towards the opening. Has this happened to anyone else? I just replaced my oil cap a couple of months ago.
Humming Sound when engine is hot
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There is supposed to be some vacuum pressure at the cap,is it possible the seal at the oil cap is bad and allowing it to pull air into the valve cover?
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