Originally Posted by Paul89
The belt is definitely slipping. Is the belt shiny on the flat side? Then I would agree it could be the the water pump or the idler pulley possibly. Might also be the AC compressor. they are known to go out. Have to change to a new belt?
Well he said passenger side so it can't be the A/C compressor, it could if his hearing is messed up. I would bet my money on that water pump though, they are known to fail and it doesn't surprise me because if that big viscous fan that is attached to it.