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It sounds as if the belt is dry. Belts dry out after a certain amount of time and then start to make chirping noises. If the belt is not badly cracked, you can try using a belt lubricant spray. These sprays usually only last for a short period of time, though.
If you are talking about the fan it's self it could be one of three things. Fan belt may be worn and needs replacing or if its new the belt may need to be tensioned again as new belts do stretch a bit. But while you are there check the rubber of the belt for cracking or perished area Could be a noisy bearing that needs cleaning or replacing which will make a whistle type sound. Last is that the actual fan may be out of shape or the fan housing which could have a build up of dirt dust that could give off a odd sound. Hope this is of some help
The A/C compressor has its own belt and tensioner. The alternator, p/s pump, and water pump use the other belt and tensioner. Make sure you check the A/C belt while you're digging around in there. If it is cracked replace it.
Are you in a state where it gets pretty cold in winter?You may have a component in the belt system about to seize up.That happened to me when I lived in NY.I heard a squeak for a while,then 1 day the belt broke.I replaced it,drove about 10 miles and it broke again.My a/ccompressor had seized.You may just need a belt but if you are going to self-repair,draw a diagram of the belt loops and after you take off the belt,turn all components and they should turn slightly freely,yet still kind of difficult,sorry it is hard to explain though.Inspect your belt for many small,slightly widening cracks,or larger cracks,or fraying on the edges.You will not be able to turn the engine belt drive.Good luck! Greg
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
Belt tensioner puley.Sience you said timing belt was done , that means water pump was replaced too.
Just had same thing in the shop , weard noise hard to tell were from , happened to be a serpentine belt tensioner puley.Can't replace puley only , it comes as assembly.
If your belts are in good shape and tension is proper, you should take off the belts and srin each pulley or tensioner that turns with the belt. I think that you will find that a bearing is going bad. Try to do this when the engine is cold for that will usually make the noise more pronounced.
is it comming from the serp belt?look when the car is off to see if the belt looks brown and shiny and or cracked,,it could be the belt is loose or just old and worn and slipping on the pulleys,,may be your noise,or if you mean squealing while driving it could be the brake pads are low and the low indicator squealers are hitting the rotors to let you know the pads are low and need replacement