Gary Maurizi

Hey guys,

I really need help on this one. My power steering pump is making a whine noise when moved only to full stop.

I also hear a wooshing sound when moving the wheel full stop left right with the engine off.

I did a full flush and bleed according to these instructions: http://shbox.com/1/4th_gen_tech2.html#psflush and the wooshing sound when engine off seems to have gone away, but i still have the loud whine when turned full stop with the engine on.

Theres a video with audio available here: https://photos.app.goo.gl/9VRrJi7WgxqmmNar6

Could really use any help on this one! I really cant afford to replace the entire PS pump right now...

Gary Maurizi

is it possible that this is normal and I just never listened for it before? I never really had my ear listening with the hood open while someone turned the wheel full-stop?

sjsingle1

iTrader: (1)

the video shows lots of bubbles in the reservoir....did you bleed after the flush ? use synthetic fluid ? ( highly recommended !!!! ) could not tell if you have the factory PS cooler.....if so get rid of it ! the best way to bleed is to raise the front end so the wheels are in the air and turn lock to lock till all the bubbles are gone......the wheels at lock make the pump put out a lot of pressure that the wheels dont need.....hence ( i think ) the pump whine

if the pump whine is at lock is more than normal i would be worried...but during normal driving if it is not more than normal noisy....dont worry

LLLosingit

iTrader: (4)

When you turn full lock left or right you basically dead head the pump and the pressure will rise, So to keep that pressure from doing damage there is a relief valve/ bypass valve. That noise you hear is the relief valve/ bypass valve opening.

Gary Maurizi

Thank You both very much! I had a feeling this was normal.

I did fully flush and bleed the system just for good measure.