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engine noise

  1. MYSTERY engine knocking sound

    E39 M5 and E52 Z8 Discussion
    Hi all. I am a bit puzzled with a knocking sound seemingly coming from around the top drivers side area of my engine (passengers side US). I have just replaced the timing chain, tensioners, and chain guides, as well as the big end bearing shells and conrod bolts, all with brand new BMW parts...
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