I've got an 84 5.0 HO that likes to eat valucrap 84.5" (850k6) smog pump bypass belts from Autozone a few days after I install them. The belt that the car came with is older than dirt and works fine. It is routed the stock way (A/C included) but bypasses the smog pump. I don't see that any pullies are locking up or have resistance in turning. Also, no pulleys appear to be out of line. Do you think the tensioner pulley bearings are bad? There is a very small amount of play in that pulley, but I didn't think it would be a problem. Am I wrong? Any similar experiences?