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Re: Screeching noise while starting the car?! (archive)

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Posted by dudel on August 27, 2001 at 09:38:29:

In Reply to: Screeching noise while starting the car?! posted by matt on August 27, 2001 at 01:09:09:


The belts turn whenever the engine turns (starting is not an issue).

How old are your belts? You may be seeing some squeal from glazed belts. The glazed belt does not have the same friction as an unglazed one and slides on the pulley. Easily fixed by changing the belts or using some belt dressing. (if the belt has cracks, then just replace it)

Could be your timing belt, but I don't think so. Timing belts don't run in V pulleys, and therefore don't tend to glaze.

Issue with timing belts, is that they stretch. When they stretch too far, they can jump teeth on the timing gears. jump to many gears on an interference engine and you get pistons getting too friendly with valves. Very expensive to fix. I currently helping a friend with an M5 where the piston crashed against some valves. Very ugly. Now the M5 has a timing chain instead of a belt, but the chain tensioner collapesed resulting the same result.

Hope this helps.


I noticed it about a month ago while starting the only did it once and it didnt happen again until maybe 2 weeks ago and it has done it every so often since.....any ideas?? Could it be my starter is going out even though it always starts up on the first try easily?? The screeching sounds like a there a belt maybe that is running while I start the car? TIA

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