I have an engine whine that follows the engine's rpms, whine gets louder as rpm's rise. I have narrowed it down to the power steering pump after replacing the tensioner pulley and using a log screwdriver against the pump as the fiance reved it up for me to track down the whine. The pump has plenty of fluid, my steering is fine, and no whine when turning. It seems to be the bearing that runs the pulley. Is there a way to replace just the pulley bearing or is it more practical just to change the pump. I really hate to change out a pump that works, but the noise is starting to get to me, unless it is the pump's way of saying it is about to crap out on me. After looking at a compnine drawing, it looks like the bearing is built into the pump, red arrow, but could someone verify this for me. After I swap the pump, do i need to do any bleeding or flushing of the system? I have never had to mess with this system before and any advice would be helpful. Thanks.