OK, I am having a hard time telling if it coming from the tensioner pulley or the alternator. With the engine running I pulled the tensioner bolt towards the front of the car (clockwise) to add tension and it shut up with just a few pounds of torque. I pulled the belt and spun the alternator by hand and there is a little chirp turning clockwise. Would that little chirp turn into obnoxious squealing under load of the belt when running?