Originally Posted by BIGMAN95YJ
could be the bearings going out on the alt also. i had a similar experience. sometimes it would squeal, sometimes not. eventually the thing locked up one morning, about 4:30 in the morning, all my neighbors heard it.
X2 Same thing happened to me over a period of time. I kept adjusting it tighter, and the squeal would disappear. Eventually, it was squealing and smelling strongly of burnt rubber. Took a look, and sure enough, alternator seized.