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M42 Squealing noise

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    #1

    M42 Squealing noise

    hey guys,

    heres a video of the squealing noise.

    https://www.youtube.com/watch?v=axKbx3qoLWQ


    whenever its cold out (or my engine is cold) it squeals like this EVERYTIME i come to a stop. I usually dont drive my car very far at night so i havent really figured out if its because of the ambient temperature or the fact that my car is still cold. whenever i release the clutch and the engine idles back to 750rpm, it starts to squeal like this and will go away once i hit about 2.5k rpm. i noticed it got worse when i sprayed some belt lubricant (or whatever its called) on it, trying to remedy it.

    anyone know the cause? ive read it could be the belts/pulleys but im not sure.

    thanks

    1985 528e
    1991 325ix
    1992 318i Convertible

    "this question is kind of like asking: would you rather be ass raped by a gorrilla with lube on his dick or butt pounded by a prison inmate with size 14 shoes and no lube....?"
    Tags: None
    #2
    Most likely a loose pulley or worn belt. I would check that your power steering pump and/or alternator brackets are not loose.
    Parts Collector and Former Houndstooth interior junkie.

    Comment

      #3
      The video is private but from what you described it's a loose belt. My alternator belt get's loose every now and then and makes that noise.

      Give her a crank and you'll most likely be set!
      sigpic

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        #4
        Originally posted by Vanilla Gorilla View Post
        The video is private
        changed so its unlisted

        1985 528e
        1991 325ix
        1992 318i Convertible

        "this question is kind of like asking: would you rather be ass raped by a gorrilla with lube on his dick or butt pounded by a prison inmate with size 14 shoes and no lube....?"

        Comment

          #5
          My alternator belt did that on my m10. It was loose so I adjusted it and the sound went away. The alternator bushings were clapped out so I swapped in new ones a few weeks later.

          Comment

            #6
            I had a simliar noise. I tightened the belts and also sprayed some 'belt dressing/belt conditioner" on the belts and pulleys. This is a tacky spray which gives the belts more traction. CRC makes it and you can find it at most auto part stores.

            Comment

              #7
              Originally posted by mark1991 View Post
              I had a simliar noise. I tightened the belts and also sprayed some 'belt dressing/belt conditioner" on the belts and pulleys. This is a tacky spray which gives the belts more traction. CRC makes it and you can find it at most auto part stores.
              I've noticed that when I spray the belt dressing on, it helps for maybe 1 drive, then it seems to get worse than before. It used to only squeal once at startup, but now it squeals almost everytime i come to an idle.

              1985 528e
              1991 325ix
              1992 318i Convertible

              "this question is kind of like asking: would you rather be ass raped by a gorrilla with lube on his dick or butt pounded by a prison inmate with size 14 shoes and no lube....?"

              Comment

                #8
                Mine just started to do this. I replaced the belts about a month ago and it was great. For the last few days it has made this noise when it's cold...

                I'd have to say it's quite annoying.

                Comment

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