Is it possible just to change the pulley on the aircon compressor? I've recently changed a belt that was squealing and was heavily worn on the outside, now the new belt is starting to squeal too. I've taken it off and the pulley on the aircon has a small amount of play in it so I'm thinking the bearings are worn. By play i mean if I grab it I can rock it slightly on it's spindle, kind of like when a wheel bearing goes. Is this a good assumption? All other pulleys seem solid and seeing as it's the outside of the belt that's worn it seems to point to that or the tensioner.