Nasty sound...

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  • Slangbox
    E30 Addict
    • Jan 2009
    • 599

    #1

    Nasty sound...

    My engine has been making this sound off and on for quite some time now, and I'm fed up with it. I've tried listening for the noise, tried the ghetto stethescope (screwdriver) method, and I am unable to make any educated guess as to what it is. Anyone know what this is coming from or at least have a good guess to get me started eliminating it?

    The noise I'm talking about is not the m20 tick that's so prevalent in the vid. I'm talking about the banshee-like squealing/??? Noise. If it's obvious and I look like an idiot, great. All the more easy to fix it.

    Thanks in advance for any guidance you can give me here.



    Edit: sorry for the shitty iPhone vid; it was all I had. But you can still hear the noise pretty clearly.


    Body roll+perspective=the poor man's drop
  • Knockenwelle
    Grease Monkey
    • Jul 2008
    • 395

    #2
    That sounds an awful lot like my alternator when I killed the bearings.
    sigpic

    Mike

    '91 325i track car. Mostly...

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    • Slangbox
      E30 Addict
      • Jan 2009
      • 599

      #3
      See I had started to think it wa the alternator. Damnnnn that's a lot more than a belt.


      Body roll+perspective=the poor man's drop

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      • quickervicar
        E30 Enthusiast
        • Jun 2009
        • 1197

        #4
        Take off each belt until it stops.

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        • Slangbox
          E30 Addict
          • Jan 2009
          • 599

          #5
          Good suggestion.


          Body roll+perspective=the poor man's drop

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          • lateracer
            Grease Monkey
            • Sep 2009
            • 302

            #6
            I just got rid of a bad fan clutch that sounded similar to that.
            sigpic

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            • gtdragon980
              E30 Mastermind
              • Jun 2008
              • 1808

              #7
              or it could be your water pump going bad, get a stethoscope and listen to that and the alternator...definately sounds like one of those

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              Originally posted by scabzzzz
              I stand up, pull my dick out, and asked my gf to give me some noggin... Well, she starts laughing at me and I freaked out and ran off and locked myself in a bedroom.
              1989 325i - Project/weekend driver
              2002 325i - DD
              2005 Suzuki SV650 - Toy

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              • xwill112x
                Θέλησα έναν τίτλο συνήθειας, απορροφώ για να είμ&#
                • Jan 2009
                • 4236

                #8
                my m42 sounds similiar to that... i just took the fan clutch off yesterday, had no success with getting rid of the sound..
                sigpic

                Comment

                • Slangbox
                  E30 Addict
                  • Jan 2009
                  • 599

                  #9
                  I just wanted to this, as I realized that I forgot to, so that it is searchable for the term alternator noise. A new alternator fixed this problem.


                  Body roll+perspective=the poor man's drop

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