So you installed another pulley (not the actual correct part), right? You should move to eliminate that pulley by installing a LateModel21 Belt Wrap Kit or a Needswings Pulley Saver Kit. That idler pulley is a "destined to fail" part because it simply spins too fast and the bearing will fail (again). Also FYI you should not use that little torx head bolt in the center of the belt tensioner . . . you should use a 1/2 inch drive ratchet or breaker bar with a 15mm socket on the pulley nut to move the tensioner counterclockwise when slipping the belt on or off.