2006 Toyota Corolla LE. Loud squeaking coming from serpentine belt area after I start the engine cold. Changed the belt recently but still noice persist. Loud squeaking goes away after driving for 3-5 mins. I'm thinking it's the belt tensioner pulley or the belt tensioner itself. If it's the pulley, how do it, or is it possible to, replace just the pulley from the belt tensioner. Also how would I be able to get to it as the space is really limited. Thanks!

One of your belts need to be replaced

Are you saying the serpentine belt is screeching after the engine starts, or the starter is screeching when you are cranking the engine ?

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

The problem is the rear motor mount is filled with hydraulic fluid that leaks onto the accessory drive belt. The motor mounts fail prematurely and the fluid makes the belt squeak. Toyota dealership I took my 2006 Corolla to replaced the motor mount and belt free of charge.

Check tension the drive belt(s) as slipping at low rev is a classic indication of this fault. In extreme conditions a rubber burning smell may be present. Replacement of drive belts is the 100% remedy and best option .

Misalignment of the belt, incorrect belt, worn or loose tensioner, Too tight of an adjustment (many service centers do this on purpose so when the belt breaks in it becomes properly adjusted, I do not believe in this philosophy), The belt is actually one long belt called a serpentine belt.....

If it is the belt, you need to buy a special tool made to relieve the pressure from the belt tensioner, As you do that the belt will slip off. Don't let anybody tell you that you can use a ratchet and socket to loosen the tension. If your tensioner is not designed to work like that, it will strip the bolt out. While you have the belt off, turn all of the pulleys and make sure that they are not the cause of the squeaking sound. Make sure to memorize where your belt goes, a serpentine belt can be very confusing to put back on if you don't remember how it came off.

You'll have to remove the engine cover under the bottom so you can position the new belt on the pulleys properly. Get a wrench or tensioner tool and turn the tensioner clockwise to relax the drive belt. Don't apply excessive force.

It's hard to draw a picture with words, but looking at the engine from the passenger side of the car, there are basically two top pulleys, two middle, and two bottom. The drive belt goes around the outside of the two top and two bottom, and on the inside of the two middle.

It sounds like an idler pully needs replaced. The bearings are going bad. It is not hard to do this, but more than likely that is what it is. You should also replace the belt.

the squeaking sound coming from the engine would very very likely be the serpentine belt, it is probably not properly adjusted but could also be cracking and need replaced, after the belt warms up the belt is more plyable and looses the noise. i would replace it, as for the rough sound i would need more info i.e. exactly where the noise is coming from if it changes when gas is tapped, try putting different conditions that make it worse or better when something is done, this will help detecting the area or problem at hand.