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2009 Volvo C70 Question: there is a suction through oil cap. when it is on the engine makes a high pitch.

 

Question

nuze, 2.5L 5 Cylinder Turbo, Ashland, OH, April 16, 2013, 15:44
 Rookie

when the cap is off the sound stops and there is a suction at the opening from hole where oil goes.

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  • Answer #1

    April 16, 2013, 15:51
     Rookie

    The suction is normal.
    It sounds like the seal in the oil cap is bad. Usually you can replace the O-ring.
    If you can't just order a new oil cap, shouldn't be more than 10 bucks.

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  • Answer #2

    April 16, 2013, 16:37
    Profile_thumbnail
     Master

    Engine breather is stopped up! Pcv system cant pull in fresh air through it.

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