To the caller with belt squeal 12/13/2009

Loose belts squeal when an added load such as A/C or power steering acts.

A perfectly good belt can squeal if the A/C, water pump, and/or power steering pump is seizing and drawing more power than the belt can deliver.

One thing that was unsaid was why the caller was replacing bearing and pulley bearing in the first place? Reading between the lines he was having this problem before, and after.