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Serpentine belt squeaking noise


simone
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Hi all,

My mk1 has been giving some squeaking noise in cold engine start, but then it vanishes after the engine gets properly warm (10-15 minutes), it started since this winter but now that its got a bit warmer it stops squeaking after a shorter time. A visual inspection of the belt is not showing any sign of fray or damages, and can't see any pulley misalignment when the engine is running.

My question is, does the squeaking sound relates to the belt or could it be from a pulley?

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More than likely a pulley,I have a squeak in the morning,not every time only for around 5 minutes.

Sent from my iPad using Ford OC

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Is it safe to leave the noise of a pulley as it is?

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Mines been squeaking for well over 2 years,I just live with it until I need to change the belt.I suppose there is a risk of the pulley seizing but haven't seen any posts about it.

Sent from my iPad using Ford OC

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Can faulty diodes in an alternator cause noise? if so, does the alternator needs to be replaced? Have tested the alternator an it shows good voltages 14.6 V.

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2 hours ago, simone said:

Can faulty diodes in an alternator cause noise? if so, does the alternator needs to be replaced? Have tested the alternator an it shows good voltages 14.6 V.

Yes I think they can produce electrical noise at least, that can manifest itself as noise coming through your Speakers when you've got the radio on

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probably to water pump seal squeaking.

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I hear a low whine noise at idle and when I start to accelerate it gets a bit louder (noise regulates as the engine revs gets higher or gets lower), later on I can't hear it probably due to the engine noise, but yes I also hear a whining noise when the radio is on.

can this be sign of diode fail in the alternator?

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