You can try the soap trick.use a bar of soap and hold it on the edges of the belt very carefully, while it's on or you can do it off
Might check the crankshaft pulley some are two piece pulleys that can spin between the pulley hub and the outer belt ring causing a squeal sound like a belt, a good way to check for this is make a line from the center out to the end of the pulley with chalk, start the engine and wait to hear the squeal then turn the engine off and check the chalk mark to see if it's changed, if it has then that's the problem, replace the pulley.
Belt is loose and stretch a little caused squeal, need readjust to tighten it up.
SOURCE: loud squealing noise
Probably a belt getting loose or worn. If alternator has a separate one than the rest, try just tightening it up. My guess is that it's probably all one belt with a tensioner pulley, which means you can't tighten, (spring tension already applied by tensioner) you have to change the belt, to get rid of noise, and if noise comes back in short time, think about changing tensioner.
SOURCE: Intermittent squeal Nissan Primera Y reg 1.8
That would be the Wheel Bearings or the Brakes. Check the Brake Pads first for Wear, If they are OK, Then you will need to Pull the Rotors and Replace the Bearings.
SOURCE: set time on timing belt Subaru Baja
make sure alignment
marks of both cams are at 12 o'clock crank alignment is also at 12,use the line on the reluctor of the crank gear as your mark ,match it with the mark on on the oil pump housing where the crank sensor is,,ok all marks at noon that's what i should have said idon't want to confuse you good luck
SOURCE: my 1997 subaru impreza squeals badly and then engine smokes
Hi this sounds weird does the smoke come out from the front engine covers? the squealing could be the cambelt trying to turn a semi or completly ceased waterpump which would cause the smoke after a while, also without the waterpump working properly the engine will leak water and anti freeze out the overflow and overheat really quickly
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