make sure there is no play in the impeller shaft. if i were buying a supercharger (and i just did) i would just cough up the extra few grand and get it new. too much could be at risk with a used one. or you could buy that one and have it re manufactured. there are a few companies that will re do all the bearings and seals.
__________________ Procharged 2002 Mustang GT 5 Speed 351rwhp 353rwtq at 10psi
Next summer looking to go with:
Bilstien shocks + struts, Lowering springs (brand still TBD (any suggestions?)), MM CC plates, front + rear sway bars, subframes, and upper and lower control arms.
Time to make the pony ride some rails  | 
need advice quick. Price on SC 
