For the first three minutes my 2008 CS2 (80k miles) would produce a faint squeak/squeal sound from the engine area. After too many other attempted "fixes", including belt changes, I finally solved it. It turned out to be drive belt rubber built up on the AC and Power Steering pulleys. Before changing to a new drive belt, I cleaned off all the pulleys with super fine sand paper (using a rubber wheel attached to a drill to spin the pulley while holding sandpaper in the belt groove). Problem solved. That was six months ago and has sounded perfect ever since.

 

Thanks for sharing. Great find.

Without this story, I would have thought that a build up of rubber would have increased friction - kind of like a race track...