Power steering pump screams

Discussion in 'Troubleshooting & Diagnosis' started by Millwright, Jun 18, 2019.

  1. Millwright

    Millwright Member

    Messages:
    52
    Likes Received:
    22
    Joined:
    Mar 30, 2019
    Location:
    Ontario Canada
    My power steering pump on my 73 screams when at full lock. It also will do it the odd time before full lock if the car is hardly moving. It seems to me its when the pump is loaded up.

    Fluid level is correct
    Lines appear to be tight...I guess suction could be still be leaking but...
    Car has had less than 3000 miles since restoration 10ish years ago so I can't see that the fluid needs to be changed.

    What is the likely cause of the pump screaming? Do I need to change the pump?
     
  2. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

    Messages:
    10,993
    Likes Received:
    720
    Joined:
    Nov 4, 2004
    Location:
    Ringgold, GA
    Belt screeching?
     
    70-camaro likes this.
  3. Millwright

    Millwright Member

    Messages:
    52
    Likes Received:
    22
    Joined:
    Mar 30, 2019
    Location:
    Ontario Canada
    It doesn't sound like a belt to me. Sounds like the pump.
     
  4. Gary S

    Gary S Administrator Lifetime Gold Member

    Messages:
    23,517
    Likes Received:
    1,325
    Joined:
    Apr 14, 1999
    Location:
    Bismarck, North Dakota
    Listen to CorkyE.
    When the belt slips, it screeches. The pump likely isn't capable of making a screech. Put on a new belt and adjust it right. Then after driving it for a few days, readjust the tension. That has solved every screeching power steering system I've ever worked on.
     
    70-camaro likes this.
  5. Millwright

    Millwright Member

    Messages:
    52
    Likes Received:
    22
    Joined:
    Mar 30, 2019
    Location:
    Ontario Canada
    The pumps usually cavitate making a very distinguishable sound.
     
  6. xten

    xten Veteran Member

    Messages:
    3,799
    Likes Received:
    2,638
    Joined:
    Sep 24, 2014
    Location:
    Pittsburgh, Pa.
    Mine did the same thing. When I installed VA on my 73, I decided to freshen up the pulleys. Sandblasted, epoxied, painted them satin black. I painted in the grooves where the belts go. Big mistake. Ruined all the new belts. Paint got impregnated in the belts and they screamed just like you are describing. At random my PS would get hard to turn and squeal. Thought it would wear off but didn't. It ruined the new belts. May be something to look into.
     
  7. dave@ztech

    dave@ztech Veteran Member Lifetime Gold Member

    Messages:
    4,457
    Likes Received:
    995
    Joined:
    Mar 27, 2016
    Location:
    NY
    Have had PS pumps make a noise when they start to go out, however, more like a moan and groan , then a squeal
     
  8. Millwright

    Millwright Member

    Messages:
    52
    Likes Received:
    22
    Joined:
    Mar 30, 2019
    Location:
    Ontario Canada
    mine is that same power steering groan but much louder
     
  9. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

    Messages:
    10,993
    Likes Received:
    720
    Joined:
    Nov 4, 2004
    Location:
    Ringgold, GA
    Here's kind of how I look at it. Belts are cheap and I'm not going to put a new pump on with an old belt, just me. So, buy a belt first and if that's not the problem, you have a new belt to go with your soon to be new pump. IMHO
     
    dave@ztech likes this.

Share This Page