How do you check the idler pully to stop squealing?

Hi try this on the belt..cheers

Take the belt off and turn all of your pullies by hand an make sure none of them are catching or siezed. Also run the car and watch your ac compressor, when it kicks in make sure it is turning

The belt has most likely moved either in or out on the bottom pulley. Check it first. I had the same problem it looked ok but was out one groove missleading designed pulley.

If you look at the engine from the front, there is a big belt called a serpentine belt. That belt connects the fan, air conditioner, power steering pump, alternator etc. There is a pulley on it the maintains the tension. The is the idler pulley. They are plastic in most cases and wear out or squeal.

COULD BE A BAD BEARING IN THE IDLER PULLY OR THE TENSIONER ON THE TIMING BELT OR THE SERPENTINE BELT. IF ITS A SQUEEL IT MAY BE SOME COOLANT GOT ON THE SERPENTINE BELT. TRY TO WASH THE BELT WITH WATER AND LET DRY COMPLETELY. IF NOISE REMAINS RETURN TO THE SHOP THAT DID THE WORK.

Check the belt tensioner they squeal when they fail due to constant spring pressure on the pulley> if you replace it I would suggest replaceing the belt unless it is new, check the alternator bearings ( spin it by hand with the belt off> they are known to fail)finally clean all pully and make sure the belt is perfectly clean and nothing on it before installing it. NOTE:Never get any grease on a serp belt it will make noise.

Really don't need a diagram. Loosen the slide bolts on the power steering pump. loosen or tighten the pump by turning the jack screw (long transverse bolt) under the pump. Once the belt is tightened up, lock down the slide bolts and you are finished.

It should not require any adjustment. the right tension is provided by the idler pully. If you want to release the tension for serpentine removal or examination release the tension on the idler pulley in the rear of the motor, spin the nut in the center like you were tightening, and the pressure will be released from the serpentine belt. Reversely, the appropriate tension will be given using the same way when the strap is reinstalled.
Dan

first thing you need to do is get a new belt that belt dressing just destroyed that belt that stuff is no good then get a new belt tensioner clean all the pullys with some brake clean then install the belt tensioner and belt if its still sqealing there maybe a pully making the noise to check that when you have the belt off spin them by hand and listen to them and feel for any play in the bearings

You could have a worn serpentine belt, and or bad idler pully bearing or a bad serpentine belt tensioner. With that anount of miles and years in the truck, it wouldn't hurt to change all. A good thing to check if it is the belt is to spray some water on the belt while the engine is running. If the noise goes away then it's your belt and while the belt is off, it's a good time to check the pully bearings.
Good luck and hope this helps.