power steering noise

Discussion in '4X4 Truck Talk and Repairs' started by wylie catter, Jun 13, 2009.

  1. wylie catter

    wylie catter Member

    Messages:
    675
    State:
    South Carolina
    I have a 96 tahoe that the power steering pump was leaking on. So I finally replaced it. But it stll whines. It does it a lot worse when its cold. It almost stops when its hot.

    The manual says to bleed it by turning the wheel side to side. But I think it still has air in it. Does anybody know a trick to fix this. I'm about to say this pumps defective. But I sure aint excited about changing it again.
     
  2. smokey869

    smokey869 New Member

    Messages:
    966
    State:
    frederickt
    you might try letting it idle with the wheels straight ahead and watch the resevior level, if the fluid is foaming it probably has air in the system, to bleed it you turn the wheelsside to side with the engine off, its easier if you jack the wheels off the ground, run them back and forth to the stops about 10 times each way with motor not running and see if that helps
     

  3. wylie catter

    wylie catter Member

    Messages:
    675
    State:
    South Carolina
    Ill try that. Thanks.
     
  4. indycatman

    indycatman New Member

    Messages:
    1,002
    State:
    Greenwood, Indi
    terry is the power steering fluid looks white then there is still air in the pump need to have someone out there with you and have them turn the wheel side to side and watch the fluid cause it will drop fluid has to get into rack also and the fluis will once the air is out the fluid will go to noemal color
     
  5. trnsmsn

    trnsmsn New Member

    Messages:
    1,214
    State:
    Missouri Originally Now I
    Good morning, the best way I've found is to jack up the front end, start the engine & turn the wheels all the way to the left or right, "Lock to Lock", then shut off the engine briefly, Start it back up & turn it the other way & repeat the process.

    By turning off the engine the pump is not sucking the air back in, that's still in the system. It's "gravity" bleeding.

    HTH, Elliot
     
  6. Colsrob

    Colsrob Active Member

    Messages:
    862
    State:
    Ohio, Columbus
    I know this thread is fairly old, but the OP did not reply on his success or not.

    Elliot, you are exactly correct as to the best way to bleed the power steering. I was a power steering specialist for 15 years. My main duties were rebuilding the pumps. I can do some gears and racks as well, but I was a god with a pump.:smile2: I even rebuilt a pump for a Navy ship once.

    It may take several attempts to get the air out too. If it doesn't begin to show improvement after 2-3 trys, I would feel safe to say that the new pump was not right either.

    The problem with a lot of "new rebuilt" pumps is, that they are not actually rebuilt. The seals and o-rings are removed, but the pump is not actually disassembled. It is flushed out, resealed, and tested. If it passes the tests, it is sold to whatever auto store the contract is with. It's cheaper to do it that way, than it is to actually spend a bit more time to properly rebuild it. The place I worked for actually stripped it down to the beginning. Replacing or repairing any part that was not suitable. I could completely rebuild an average pump in less than an hour. Most of the time, only a 1/2 hour was needed. It was a good company and a good product.