rattling sound near polybelt should i worry?

Discussion in 'Engine' started by maani, Jun 2, 2011.

  1. maani

    maani New Member

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    Location:
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    Car:
    W208 clk 430 2001
    Hi All,

    I hear this rattling sound and it looks like its from the polybelt area. Is the tensioner going or is there something else i need to worry about?

    It is more pronounced at idle and I don't seem to hear it when reving up the engine.

    noisey polybelt area - a set on Flickr

    Thanks
    Imran
     
  2. diandave

    diandave Active Member

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    Car:
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    Rattling sound is never good, could be a pulley wheel or idler coming loose, I would check them asap you dont want a damaged rad.
     
  3. Justin1600

    Justin1600 MB Enthusiast

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    It is normally a noisey top idler pulley mate, the pulley nearest to your camera in your video. :thumb:
     
  4. OP
    OP
    maani

    maani New Member

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    Car:
    W208 clk 430 2001
    thanks Justin, a few indies near me and an MB mechanic have had a quick look and I got confilcting information. I got its a normal noise that a clk 430 will make as the pulleys look ok, another said its the tensioner :-(

    I suppose I'll have to book myself in with olly (PCS) so that it can get looked at propperly, eventhough its going to be a long drive.

    In the meantime, if anyone can think of a way to pinpoint the noise, it will be highly appreciated as I cannot really see any damaged pulleys in that area and the belt looks ok. I just dont want it to brake down before I can get it over to PCS ;-)
     
  5. BillyW124

    BillyW124 MB Enthusiast

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    if its got some damper of somesort for the tensioner, then it would probably be the bushings on the damper.

    Of course i could be chatting mess and the CLK has no such thing but just a thought.
     
  6. OP
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    maani

    maani New Member

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  7. OP
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    maani

    maani New Member

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  8. John Kerr

    John Kerr Active Member

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    Alternator drive pulley
     
  9. OP
    OP
    maani

    maani New Member

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    quick update, used a stethoscope and narrowed down the noise near to the idler pulley and water pump area. booked it in with PCS, will update thread once Olly/Jack have had a look, as its not looking like a diy job :-( .
     
  10. OP
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    maani

    maani New Member

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    polly belt just split :-(
    all pullys looked ok, wil keep an eye on if the noise returns..
     

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