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Mechanics Help Please

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  • 29-10-2008 5:10pm
    #1
    JOHNPT
    Closed Accounts Posts: 517 ✭✭✭


    I own a 99 vw golf diesel. every morning when its wet or damp wen i start the car the fan belt is very noisy for the first ten minutes. Then noise stops. It only happens in damp weather. I went to garage a week ago they changed the fan belt but its still noisy wen started.
    Can anyone give me some advice please.

    Thanks in advance


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    #2
    Anan1
    Registered Users Posts: 22,815 ✭✭✭✭Anan1


    Bring it back to the garage who changed the fanbelt?


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    #3
    JOHNPT
    Closed Accounts Posts: 517 ✭✭✭JOHNPT


    Cant i got it done by friend on a saturday. Wat would be causing the screechibg noise??


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    #4
    Anan1
    Registered Users Posts: 22,815 ✭✭✭✭Anan1


    The new belt may be a bit loose.


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    #5
    ART6
    Registered Users Posts: 2,632 ✭✭✭ART6


    Anan1 wrote: »
    The new belt may be a bit loose.

    +1. Normal with a slightly slack belt and easy to fix (ten minute job). New belts do sometimes slacken off a bit in service.


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    #6
    Plug
    Registered Users Posts: 9,248 ✭✭✭Plug


    Its an automatic tenchener AFAIK, so you can't tighten it up. Could it be a pulley perhaps?


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    #7
    ART6
    Registered Users Posts: 2,632 ✭✭✭ART6


    Plug wrote: »
    Its an automatic tenchener AFAIK, so you can't tighten it up. Could it be a pulley perhaps?

    Might be but unlikely I'd have thought. The fault is a common one with manual tensioning, as the pulleys are damp when first starting and the damp causes the belt to slip. The slipping generates heat and friction that dries out the pulley and the noise stops. So, the symptoms are that the noise started to occur on cold damp mornings. The fan belt was changed with no effect. Therefore it's not the belt that's at fault, and there's not much that can go wrong with a pulley. If the system has automatic tensioning, I'd look at the tensioner to see if it is positioned correctly and if the spring is OK.


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    #8
    jetfiremuck
    Registered Users Posts: 3,467 ✭✭✭jetfiremuck


    Have the garage remove the new belt. Then spray the pulleys with brake cleaner. This will remove the deposits from the pulley grooves built up over the years. Do not spray silicone or belt dressing on the belt to cure the noise,as it will make it worse


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    #9
    JOHNPT
    Closed Accounts Posts: 517 ✭✭✭JOHNPT


    Thanks you seem to know your stuff. Would it be possible to spray with brake cleaner without removing belt. I could do it myself then? Wat kind of brake cleaner. Thanks for all the advice.


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