So my accessory belt is squeaking like a banshee. If I remove the idler pulley on the upper right (between the alternator and the power steering) the noise defientely changes but doesn't go away.

What are the odds that my power steering pulley is bad? The alternator is a Mr. Alternator 200A unit, but the pulley is a hokey underdrive pulley, so it could be that.

Anyone have any recommendations for figuring out which pulley is squealing?

Coldie

 

WD 40

 

Remove the belt and hand turn each accessory to find the sqeek. I had a similar problem that ended up being my 200 amp alternator.

 

Check your tensioner and idler pulley bearings, too:

https://www.f150online.com/forums/sh...d.php?t=232385