Ashley King

Hi there i have just bought my first subaru and i am loving it its a 1998 impreza wrx jdm import. Had a couple of minor problems there all sorted now my new problem is a am getting a screeching noise which apears to be coming from the power steering pump. But after changing the pump and also changing the alternator and removing the aircon it has to be the bottom crank pully has any 1 suffered from this problem any advise would be much appreciated thanks