Groaning noise after TB change

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  • Aleman
    E30 Mastermind
    • Mar 2012
    • 1589

    #1

    Groaning noise after TB change

    Hey E30 hive mind -
    Have you ever experienced a loud groaning noise coming from your running M20 engine following a timing belt change?
    The noise was not there before the TB change, and it starts immediately when the engine starts.
    It keeps making the noise even after reaching operating temp.
    I suspect a faulty (new) belt tensioner, but I can't get my mechanic's stethoscope in there to confirm it. I did confirm it's not the alternator.
    Any way I could confirm the tensioner w/o taking everything apart and basically re-doing the TB job?
    TIA
    Last edited by Aleman; Today, 09:05 AM.
    R135 /// 1990 Alpinweiß II 325is
    └┼┼┘ /// 1993 Black/Black Convertible (sold)
    ..24
  • MrBurgundy
    R3V Degenerate
    • Mar 2012
    • 5356

    #2
    post a vid

    maybe PS fluid is low

    har har har
    Current Collection: 1990 325is // 1987 325i Vert // 2003 525i 5spd // 1985 380SL // 1992 Ranger 5spd // 2005 Avalanche // 2024 Honda Grom SP // 2024 Yamaha XSR700 // 2025 Jeep Wrangler Rubicon X

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    • Aleman
      E30 Mastermind
      • Mar 2012
      • 1589

      #3
      Low PS fluid groan would be a good description of how it sounds. None has leaked that I'm aware of, but I'll double check anyway - good suggestion. I have to wait till the Philly weather moves out of frozen tundra Hoth mode before heading back out to the garage to make a vid.
      R135 /// 1990 Alpinweiß II 325is
      └┼┼┘ /// 1993 Black/Black Convertible (sold)
      ..24

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      • MrBurgundy
        R3V Degenerate
        • Mar 2012
        • 5356

        #4
        I think the reservoir has an integrated filter as well. Maybe a combination of freezing temps, slightly dirty filter and slightly low fluid is making that pump choke a bit

        Current Collection: 1990 325is // 1987 325i Vert // 2003 525i 5spd // 1985 380SL // 1992 Ranger 5spd // 2005 Avalanche // 2024 Honda Grom SP // 2024 Yamaha XSR700 // 2025 Jeep Wrangler Rubicon X

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        • uturn
          E30 Modder
          • Dec 2010
          • 994

          #5
          Just remove the power steering belt.

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          • roguetoaster
            Biggus Tippus
            • Jan 2012
            • 7788

            #6
            Originally posted by uturn
            Just remove the timing belt.
            That'll teach that engine to make weird noises.

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