Dandy. That narrows it down a lot. It looks like there's just the idler pulley and the AC compressor. The compressor pulley should spin very easily with one finger. In the front of it you'll see that metal disc with the three bolts in it. You should be able to turn that too but it is going to turn rather hard. The important thing is it will turn with no clunking or locking up. If that happens, the compressor will have to be replaced.
Next, look at that idler pulley. That one is usually adjustable to tighten the belt, and most of the time they are not spring-loaded like the other one. They have to have something loosened to allow it to be moved, then you make the adjustment, then tighten down whatever holds it in place. On some cars that means loosening that nut in the center of the pulley, adjusting it, then retightening that nut. If that nut is loose, it will allow the bearing and pulley to tip and will cause a squeal.
Tuesday, October 21st, 2014 AT 11:15 PM