Date: Thu, 07 Nov 2002 23:10:59 +0000
From: Grunff <>
Subject: Re: high pitch 'squealing' when starting from cold

amar wrote: > Hello, > > RE: 1992 900 TurboS Aero (160K miles) > > can anyone explain what might be causing a high pitch 'squealing' > sound i get when starting my car from cold. It only seems to last > intermittently for about 30secs and is particularly apparent when i > press the accelerator. But once i get going the noise disappears. > > The problem seem to have started with the onset of the cold weather > recently here in London. Can anyone point me in the right direction. Almost definitely your alternator belts (you should have 2 in parallel) slipping. Check the belts for cracking/fraying, and if they look fine, then just tension them up, that should fix your squeal. If they look at all cracked/frayed, change them. They're cheap, and very easy to do. If you buy new belts, put them on top of each other to check that they are almost exactly the same size. If it isn't the belts, then it's probably your crank pulley (harmonic balancer). The pulley is made of an inner/outer part, with rubber in between. When it fails, the outer part can move with respect to the inner. If it is the pulley, then you'll have to replace it - a simple if knuckle-shredding job. -- Grunff

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