[FED 387]

OK then is there someway to check this out to see if in fact it is the compressor bearings??? This thing is at the back of the engine almost up under the dash---with out taking all the intercooler pipes etc off is there a "simple way to check it out"??? also how loose or free should the wastegate valve be? Same ?? on the impeller ??? like can I move it(wastegate) back & forth with my fingers or do you have to kinda pry/move/turn it with a pliers/small screwdriver???? Thanx for the info this is all new to me do not want to spend a THOUSAND bucks to fix something I propably can do myself--Comp 387