Ok, I shoudve asked this awhile ago. My P/S pump is groaning and chattering, it's been doing this since I had a mechanic put it on, mind that it was brand new when he did this and it did this as soon as he put it on and I drove it. The initial problem wasn't even the pump, it was a wobbling pulley on the P/S pump that needed to be changed, BUT HE SAID I needed a pump so I replaced it... funny thing is the retard changed the pump to the new one, and actually put the wobbling pulley on the new pump, so could that have damaged the pump? Could that be the reason for the noise? P.s. the wobbling pulley was removed by the mechanics boss and replaced, the pump makes No noise and gives No resistance when cold, but after warming up it chatters and groans when turning steering wheel.