Car is a 05 GTO with 9200 miles on it . I replaced the belts on it at 7600 miles and the sqeeling stopped. Now on cold start up it started up again. When engine is warm it does not sqeel. I spray a little WD40 on the AC belt and it stops. These belts are like new with very low miles. Do not under stand why they make noise.
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Re: Belts sqeeling on cold start up.
Check your tensioner pulley and idler pulley by removing serpitine belt spin the pulleys inspect for roughness and endplay all so check harmonic vibration dampner pulley the one at crankshaft for seperation/endplay the rubber cracs and pulley walks on startup you could draw a metal file across the inner face of serpitine belt this will remove glazing or replace belt may be even better
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well , you can run any metro all belts off. to see WHO squeals. then when that is discovered. then look at what is DRIVEN bay said belt. and check that for bearing siezed. or at the least set the tension to spec.
the spec, is at alldata dot cam, all time time. typical is 1/2" deflection with 22 lbs force. on v belts. Serps are diff, animal.
if a drive belt breaks, the debris can interfere with other engine components and do additional damage. rule of thumb belt life is 6yrs or 60000 miles. the belts operate critical engine systems ( alt, water pump, power steering pump) not something to short cut on. belts are noisey when cold due to additional load from battery use when starting or cold fuuids. have belts and tensioners checked for wear and correct operation
It sounds like you have a worn or streched belt making the sqeeling noise. Whenever you turn on a
device in the car that draws a fair amount of voltage
ie. a/c or headlights it will cause increased drag on
the alternator and if you have a loose/worn or glazed
belt, it can slip around the pully making the squeel.
To adjust the alt-a/c belt loosen the mounting bolts
on the tensioner, then use the adjuster bolt behind
the tensioner pully to loosen and tighten the belt.
Be sure to check the belt for cracks bald spots etc.
While the belt is loose spin the pullys to make sure
they all spin freely. Also I would replace the belt just
to be sure. Hope this helps
Average replacement mileage for a timing belt is around 60,000 miles. Many cars I have purchased had over 100,000 miles on them and had never had the belt replaced. Try to use original equipment belts or high quality after market belts when replacing. Cheap belts will not last as long and could cause serious problems if neglected(example cheap alternator belts will squeak, stretch easily, and not hold up.). I always replace all the belts when doing a job this intense. If your car has high miles it is a good idea to replace the water pump at the same time you do the timing belt.
the sqeeling suggests that the drive belt/s are slack and req readjusting however considering age of car may i suggest that you renew belt/s especially because the belts slipping would have caused damage plus unnecessary wear due to o/heating by slipping i'm sure you would not like to break down due broken belt ??
High moisture with cheap belts would be a start. 2nd possibility is you have a bearing in an accesory drying out. Check water pump pully first with the screwdriver methode. Do not place on a moving part!!!
It a particular period of time when the temperature changes and gets colder. So during the hot summer weather the belt(s) expanded. And as the weather changed and got colder the belts more likely would have the tendency to slip. There's an adjusting screw to adjust the belt tension. Hope you fix it.