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Cold mornings screeching for first minute

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  • 10-11-2006 10:03am
    #1
    Lex Luthor
    Registered Users Posts: 11,220 ✭✭✭✭


    lately, every morning from the cold start I get a slight screeching when I start up and drive for the first couple of mins. Then disappears. It only happens also when I have my foot on the accelerator, if I ease off the noise disappears. Once the engine gets warm, its gone. Car is not affected by it at all. Fan belt?


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    #2
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    Sounds like your auxiliary drive belt (fan belt) maybe slipping. Eventually it will happen all the time. Best to get it replaced. It could be that the automatic belt tensioner (if fitted) is faulty too.
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    #3
    mike65
    Closed Accounts Posts: 88,978 ✭✭✭✭mike65


    Yep sounds like the fanbelt/drive belt.

    Mike.


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    #4
    Lyre61
    Registered Users Posts: 208 ✭✭Lyre61


    my wife had a Polo with a screech in the morning only...it turned out to be the timing belt!


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    #5
    RoundyMooney
    Closed Accounts Posts: 10,910 ✭✭✭✭RoundyMooney


    Lex Luthor wrote:
    ...Fan belt?

    Yes, almost certainly.


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    #6
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    Lyre61 wrote:
    my wife had a Polo with a screech in the morning only...it turned out to be the timing belt!

    Impossible - the timing belt is toothed and cant slip - if it does it results in serious engine failure - it was most likely the timing belt tensioner that was at fault.
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    #7
    AMurphy
    Closed Accounts Posts: 1,237 ✭✭✭AMurphy


    Lyre61 wrote:
    my wife had a Polo with a screech in the morning only...it turned out to be the timing belt!

    most likely the tensioner or tensioner bearing as illustrated.

    It is common for the belt that drives the alternator to slip after starting, due to the increased load due to a cold battery that needs rapid re-charging, rear window defrosters, lights, wipers, fan motors all being on at the same time and on some diesels, aux water heaters, yes, an electrical water heater to get it hot fast.

    So either check your Alternator belt tension or simply change it if you have an automatic tensioner and see what happens.
    There are some treatments for belts to make them "sticky", however if the belt is a few years old, it's in need of a change anyway.
    You might check the condition of your battery and insure that it is not dropping to too low (<9VDC) a voltage when cold, sign of a degraded battery.

    If you have an auto tensioner and a new belt continues to noise, you could simply ignore it, it will stop in the spring when the days get warmer and longer, OR you could change the tensioner....may or may not solve the problem.


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