My air pump pulley (90 300E) is making a racket...the scenario is as follows - the pulley is separating from the air pump (i.e., angling toward the radiator)...my question is - can I simply replace the magnetic clutch ($43 from performance products) and re-align the pulley or will I have to replace the entire pump (big $$$)? I am driving on borrowed time and can almost hear the bearings crunch and melt as we speak...opinions? As always, thanks in advance, Bill