So I have a really loud and obnoxious squeal coming from my car. It will go away after about 10 or so minutes between idle and 2500 rpm, but before 10 minutes, or after 2500 rpm, it's really loud, and I'm getting really annoyed by it. I'm about 99% positive that it is the tensioner pulley because when I sprayed it with some Free-All, it quietened down right away, but the squeal came back about 5 minutes later. I think the bearing is about out on the pulley. I can wiggle it somewhat easily. It definitely has some play, but I'm not sure on exactly how much it should have. Should it have a little motion, or is it supposed to be completely solid? Ok, so no big deal, right? I'll just put a new bearing on. Here's the problem. I noticed the serpentine belt on the tensioner pulley was running off slightly on the back side of the pulley. Only about 1/4 of an inch, but it isn't running straight on the pulley. My concern is whether or not the bad bearing is what is causing this, or if the new set of underdrive pulleys that I just installed has something to do with it. I'm probably gonna replace the bearing anyway, but I don't want to still have the belt running off the back of it, as I don't really see the belt lasting like that. Has anyone had this problem before or what? Any advice is greatly appreciated. Thanks. -Will Oh yea, almost forgot. My PI cam bolts are now in. Cams will be going in this weekend.