Whistle ???

Discussion in 'Engine' started by jobela, Jan 16, 2009.

  1. jobela

    jobela Hardcore MB Enthusiast

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    Hello All,

    Did someone experienced a whistle when accelerating? Specially on low revs? What could this mean?
     
  2. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    C43 AMG with a 55 engine and supercharger, E55 AMG, S500, etc
    What car?

    Is it a diesel?
     
  3. OP
    OP
    jobela

    jobela Hardcore MB Enthusiast

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    Yes, a c200cdi
     
  4. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Its probably just the turbo spooling up.
     
  5. OP
    OP
    jobela

    jobela Hardcore MB Enthusiast

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    And that would be normal, yes?
     
  6. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Yes if it is that.

    Take it to your nearest specialist or dealer and get them to have a listen just in case it is not that.
     
  7. Bobby Dazzler

    Bobby Dazzler MB Club Veteran

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    How long have you had the car, and has it always whistled at the same volume?

    As BlackC55 pointed out whilstling is normal on a turbocharged car, but if it worsens it can suggest that there is a deeper problem.

    My Rover 220 SDi sounded great, like a diesel loco - much better than our ML270 CDi.

    On a lighter note, I find the quickest and easiest way to stop an annoying whistle, is to make the offender smile. Very difficult to whistle when you're smiling!! ;)
     
  8. OP
    OP
    jobela

    jobela Hardcore MB Enthusiast

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    No, it has been whistling more and more...
     
  9. robert.saunders

    robert.saunders Hardcore MB Enthusiast

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    The exhaust blew on my diesel turbo but to be honest it wasn't immediately obvious but the turbo started to whistle at certain gear change points; new exhaust cured that upon investigation, but any turbo whistle which is new and progressing must be investigated
     
  10. Shaun's C280

    Shaun's C280 Active Member

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    If it sounds like a ghost train it could be either the turbo on the way out or a hole appearing in the intake hose
     
  11. OP
    OP
    jobela

    jobela Hardcore MB Enthusiast

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    Ok, thank you all for your contribution
     
  12. lynall

    lynall Hardcore MB Enthusiast

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    I reckons Shauns hit the nail on the head, as you build up the revs the boost pressure builds and the leak becomes noisier.

    I have had similiar on landrovers and has been the hose from the turbo to the intercooler, not to dear.

    Need attention as it gets worse the turbo has no head of pressure to work against and can overspeed.

    You cannot get the noise just by revving the engine it has to be pulling ie working.



    Lynall
     
  13. c240yaz

    c240yaz Hardcore MB Enthusiast

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    Could it be an exhaust tone ?
     
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