DansVette

One of the belt pulleys is squeaking really bad, sounds like the bearings are shot on something. When I have the hood open and the engine running it's not apparent which one is the culprit.
Before I really tear into things, is there a particular part, that is the most common to go out first ?

Ikester

Not in particular order....

Main belt tensioner, serpentine idler pulley, A/C tensioner. Also, Dayco Poly Cog belts are recommended replacement.

lucky99

I have the same problem, replaced harmonic balancer with a 25% underdrive and the serpentine belt tensioner. I used GY gatorback belts and it squeels like a school girl until it runs a while. Looking for the culprit now.

1badf350

I would look at the belt tensioner first.

B Neat

Mine was the water pump! The coating wore off and no matter what belt I used it was cricket season under my hood. Put a new water pump on and poof, silence of the crickets. If something in the system not in alignment, then the belt will "slip" back into line when it rides over the water-pumps' smooth pulley. Mine developed the problem when my Harmonic balancer retaining bolt backed out and the balancer started "walking" off the crankshaft. After enough time, the coating on the water pump (from what I've been told, it's not paint or powder-coating, but something like Teflon) wore off and the belt started squealing on the bare aluminum. I tried stripping all the coating off and it got worse, way worse. Good luck, I've heard of all sorts of reasons for noisy belts, But the main culprit is pulley alignment.

DansVette

Thanks guys !