Squeaking noise in engine. not serpentine belt.

When I have had trouble with V-belts squeal or serpentine belts the belt is loose need to adjust tension or tension pulley bad. Belt wore and needs replacing or some of the pulleys are dragging while rotating or turning, could be bearing for pulley going bad.
Check belt is tight, look of high wear a lot of cracks in the belt. You can try loosening the belt and turning the pulley which will turn and see if they odd sounds or stiff to turn.
Car Sounds and Diagnostics ' Auto Repair Tips ' Paul Campanella's DE - Paul Campanella's Auto & Tire Center (campanellas.com)

How to Diagnose and Fix Belt Squeaks or Squealing Noise Issues - YouTube

Loud Squealing Noise From Engine Bay ' How to Check a Serpentine Belt - YouTube

Ck all units that run against the belt, something is probably locked up and causing the belt to squeak.

Check your tensioner pulley -- if you do not have enough tension on the serpentine belt, it will slip on the pulleys and cause a squeaking noise (very loud and high pitched). if you push on the serpentine belt with your hand, it should not more more than about an inch -- if it does, you are low on tension. If it does not have any give at all, then you have too much tension, and one of your pulleys might not be turning properly, causing that same noise. If your tension is right, and your car is still making that noise ... and belt dressings (the spray you probably used) are not working to stop it, then it might be a piece of rubber stuck on one of the pulleys, but this usually will not make that sound ... just smoke and a burned rubber smell.

if it is a squeak it is the belt if it is a growl it could be a pulley going bad you can better determine if it is a belt or pulley buy taking the belt off and spining the pulleys by hand to see if one has any play or noise if not relpace belt

ok if it has a serpentine belt it would be flat with grooves on one side, and the other belt style is a v belt witch has a v shape surface that fits down in the pulleys. If it is the serpentine belt most likely it has an auto matic adjuster on it that means it keeps it to proper tention. But if it has v belt then look over the belt to see if it is cracked or frayed. it so replace. Also look for burnt marks on it where it may have been sliding on a pulley if so then you have one of the pulleys locking up and thans causing it to squeak. If you inspect it and it looks ok go buy some belt dressing at auto zone and spay it on the belts good it will take the squeak out. hope this helps

ever heard of a $5 automotive stethoscope
sold in all car parts stores?
you can listen to each thing on front of any engine
and learn WHO is talking
so easy.

hi, to find out exactly where the squeak is get a spray like wd40 and spray each pulley in turn until the noise stops this will then tell you if it is a bearing on the way out and where the exact squeak if its not on the pulleys then give the belt a little spray and see if the noise stops if its does then the noise may go after a couple of days after the belt has wore in a bit.

Let me know how you get on or if you need further assistance ok

a squeaking belt can be caused by wrong tension [belt slips] if belt looks polished then thats whats happenedif it has any cracks or polish marks replace it!

U replace the tensioner or any belt run pulley only if the pulley has excessive wear or the pulley bearing has noise or excessive side to side movement, if the belt is squeaking and the pulleys it runs over are ok and don't have any of the above problems replace the belt, they should be replaced every 60,000 miles are sooner in dusty enviorments like dirt roads.

it is more than likley your alternater belt will your car is turned off try pulling the belt back and forth if you can move the belt it needs to be tightened