1997 Chrysler Sebring Convertible

Serps like to make noises when misaligned too, and it's common on Chrysler stuff for that to be due to a deteriorated bushing or loose mount in a belt driven item like the alternator or A/C compressor, or like he said a belt tensioner arm that's worn will tip in and cause misalignment....when the pulley bearing itself goes bad, they usually chatter and click rather than squeal, but if the tensioner arm is doing a lot of jumping around as it runs, this can be an indication of a bad tensioner..there are index marks on the tensioner arm that show you the condition of belt stretch, if the poiter is inside the range indicated by the two outer marks, the belt is OK, if outside, the belt has stretched beyond the tensioner's ability to tighten it to spec...get a good eyeball on trueness, or else a new belt will be making noises in no time as well, and lastly small drops of antifreeze hitting the flat side of a serp will cause whistling and squeal...look for any evidence of leakage.