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Thread: noisy disco

  1. #1
    Join Date
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    noisy disco

    Guys,
    My 300tdi auto has developed a weird issue.
    Under load, especially going up hills, there is a noise in conjunction with the regular whistle of the turbo that sounds like a plague of crickets. Can't be replicated at idle.
    The noise gets worse as the revs climb but diappears as soon as I lift the throttle.
    Hoses seem ok, though soft. Waste gate hoses are attached. Gurbo vanes and shaft feels ok.
    Oil leaking down the exhaust side of the block.

    285,000 km, head gasket never been done, timing belt due at 300,000.

    Thanks all.
    Tom.

  2. #2
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    And the noise is definitely coming from the engine bay. My first guess was dying turbo but now I'm thinking exhaust manifold gasket.
    Any guesses?

  3. #3
    DiscoGav Guest
    Has the heat shield which normally bolts to the intake manifold at cyl 3,4 protecting the turbo intake duct, fallen down it maybe sitting between the firewall and bellhousing, its a tin shield. It had me scratching my head for a while.

  4. #4
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    Yes it has. It was stuck back there but wasn't causing the noise. Cheers.

  5. #5
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    If its only under load, check the uni joints - make sure they are unloaded. A dry joint can make a chirping noise - even after greasing I had one that was bone dry from a blockage, made a hell of a racket.
    Another culprit can be the serpentine tensioner - not the bearing necessarily, but between the front part that is sprung against the back part - there is a nylon or rubber separator, when it gets worn away there is metal on metal contact that chirps a bit.

  6. #6
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    Thanks. I'll check them out but sounds most definitely like exhaust or intake

  7. #7
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    Thanks. I'll check them out but sounds most definitely like exhaust or intake

  8. #8
    Join Date
    Jan 1970
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    St Helena,Melbourne
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    Also check the injector clamp stud, when i first got my disco it had a noise that steadily got worse. Got to the local supermarket after getting sick of the racket and nipped up number 3 injector clamp and the noise went away.
    MY08 TDV6 SE D3- permagrin ooh yeah
    2004 Jayco Freedom tin tent
    1998 Triumph Daytona T595
    1974 VW Kombi bus
    1958 Holden FC special sedan

  9. #9
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    Talking

    Had a similar thing on my v8, it was a (read 1) loose manifold bolt, about 3/4 of a turn latter all noise was gone .

  10. #10
    Join Date
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    Oil leaking down the exhaust side of the block will be the cause = Blown manifold gasket easy cheap fix
    It will only make the noise under boost and load

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