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Power Steering Pump Failure

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by Coolmank9, Dec 27, 2019.

  1. Coolmank9

    Coolmank9 New Member

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    Hi all. I own a 97 VS SS. The power steering became shitty and I had it checked by a shop and they said the pump and high pressure line were leaking. I rebuilt the pump with a seal kit and the old seals were hard and brittle. I haven’t replaced the HPL yet however the car was still fine to drive even with both items leaking albeit annoying. However, upon starting the car after refurbishing the pump and somewhat bleeding (I probably didn’t do it well enough) the system I turned the wheel and it moved really well like I had definitely fixed it then suddenly a loud thud ran through the car and the power steering went to utter ****, I don’t think it’s doing anything.

    Me and dad took it for a short drive and there was absolutely nothing there. It’s horrible to drive. We are gunna properly bleed it tomorrow as per the Gregory’s manual. What do you guys reckon happened? Thanks
     
  2. losh1971

    losh1971 Well-Known Member

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    Did you make sure cam went in the right position?
     
  3. Coolmank9

    Coolmank9 New Member

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    Sorry, can you explain further mate?
     
  4. losh1971

    losh1971 Well-Known Member

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    There is a cam in the pump. If this is in the wrong position when the pump is reassembled the pump won't work. It is easy to have the cam in the wrong position.
     
  5. Coolmank9

    Coolmank9 New Member

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    I took pics as we dissembled the pump so I knew where each part went. If I post the pics can you tell me which part you mean? Cheers
     
  6. Coolmank9

    Coolmank9 New Member

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  7. vs-lover

    vs-lover Well-Known Member

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    Hi Losh,

    JFYI it's actually called the cam ring, anyone will think there's a camshaft in there. LOL !
     
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  8. Coolmank9

    Coolmank9 New Member

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    Haha yeah I was confused by that too, however I still don’t know he means
     
  9. vs-lover

    vs-lover Well-Known Member

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    It's the solid steel ring with the oblong hole in it as seen in your third photo, it has to go back inside in the exact same position how it came out otherwise it won't pump out at high pressure.
     
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  10. krusing

    krusing Well-Known Member

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    Bite the bullet, go to the Wreckers a get a S/Hand one,
    I have done a few for friends and relatives over the years, as I am hobby mechanic,
    the S/Hand one will outlast the the age of the car,
    But you MUST try and blow the old oil out of the existing lines and rack with compressed air,
    Install the replacement Pump, fill it with oil, and bleed it by turning the steering wheel from left to right quite few number of times,
    as it will appear VERY air-rated, and the oil will appear pink,
    until the oil has circulated, then it will settle down and be nice and smooth again, then top up the reservoir.
     
  11. Coolmank9

    Coolmank9 New Member

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    Ahh yeah alright, we noticed there was the 4 holes on it as seen in the photo, but on the other side there was an extra 3 small holes. We made sure they were facing opposite to the pulley attached to the pump which is how the cam ring fell out of place when we dissembled it. However, does the positioning of the side with the 3 small holes matter as long as the piece is facing the right way? Or does it need to be rotated along its axis?
     
  12. Coolmank9

    Coolmank9 New Member

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    Yeah I was thinking about buying a second hand one but don’t really wanna spend the extra cash. We bled the system like you said when the car was still jacked and upon lowering it the wheel turned freely for a second then the car thumped then there was nothing as I mentioned before. I’m hoping I just didn’t bleed it properly and there is still heaps of air inside the system.
     
  13. losh1971

    losh1971 Well-Known Member

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    it only takes a couple of turns to get nearly all the air out. I'd say its an issue with the assembly. If its frothing then there will still be air in it.
     
  14. Coolmank9

    Coolmank9 New Member

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    Yeah hmmm alright. It was frothing to begin with but not really now. Maybe a seal broke cuz it was working great for a second then bam. I don’t think there is an assembly problem cuz we paid great attention into doing it properly
     
  15. vs-lover

    vs-lover Well-Known Member

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    I'd say your cam ring has been installed 180 degrees incorrect. There are 4 ways that the ring can be installed, with 3 of them being incorrect and one way only being right.

    One thing also that I noticed and I never do and that is to remove the snap ring that holds the vane boss on the end of the main shaft. I've done hundreds of these and found it's best to push the shaft out of the housing backwards leaving the boss attached as you are going to remove the front seal anyway and replace it prior to re-installation. Those snap rings can give you grief later on if not fully tight. These are not supplied in the kit either, thus best left alone.
     
    Last edited: Dec 28, 2019
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  16. Coolmank9

    Coolmank9 New Member

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    It was the snap ring. We fixed it, cheers
     
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  17. vs-lover

    vs-lover Well-Known Member

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    Yep that'll do it everyday,

    That's why you should never remove them and thus why they are not included in any of the repair kits that are out there on the market.

    Anyway a good result in the end.
     
  18. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    I always remove the snap ring, just a little care and it works out fine.
     
  19. vs-lover

    vs-lover Well-Known Member

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    For the skilled operator yes, for everyone else ?............... probably best not to touch it.
     

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