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  1. #1
    Join Date
    Apr 2018
    Location
    East Falmouth, MA
    Posts
    1
    My Cars
    2011 BMW x5

    Noise coming from engine bay

    When I start of sounds like squeaky pulley at around 1200 rpm, I let of the gas and noise stops. Someone said it could be the PCV valve?

  2. #2
    Join Date
    Dec 2015
    Location
    Mpls, MN
    Posts
    15
    My Cars
    1998 BMW 540i
    Is the sound constant or only when you accelerate? If its constant, it could be the PCV valve pipe (had experienced). If its only when you accelerate, than check the engine oil cap. Sometimes the rubber become loose or out of place and it will make a whining/squeaky sound. Clean it or buy new one if its missing the rubber-O ring. Had it happen to me and I just clean it with a towel and no more whining/squeaky sound.

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