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    Potential Power Steer Pump problem

    Hi all,
    My Stag has started to emit an intermittent noise at open road speeds. Proving difficult to pin point.
    I can change the sound being generated by moving the steering wheel slightly.
    My first thoughts were front wheel bearing, I haven’t dismantled hubs as yet but the front wheels give no rumbles or concern when jacked clear of ground.
    Then thought of the viscous fan coupling, but no noticeable rumbling, but not sure how to diagnose these.
    Now I am thinking power steering pump - possible bearing. Checked pulley no excessive movement and belt is not excessively tight.
    Has anyone else experienced a power steer pump failure and what were the initial systems or should I look elsewhere.
    As always appreciate your thoughts.
    Cheers
    Brian

    #2
    If you take the belt off and go for a drive does the noise go away?

    Comment


      #3
      Interesting. I overhauled my pump with new seals all round, but it exhibits a rather quiet asthmatic wheeze when I steer the car. It's not the overpressure valve noise when the steering is struggling at parking speeds or full lock, but a very unobtrusive small hiss.

      Drew
      The answer isn't 42, it's 1/137

      Comment


        #4
        Good thoughts will try a drive w/o the pump engaged and report back.
        the sound is more of a whine than a hydraulic hiss.
        If the engine is stopped for period to cool down the noise will cease on restart.

        Comment


          #5
          Originally posted by brian buttimore View Post
          Good thoughts will try a drive w/o the pump engaged and report back.
          the sound is more of a whine than a hydraulic hiss.
          If the engine is stopped for period to cool down the noise will cease on restart.
          When you take the belt off note which way round it runs and if the noise has gone away try refitting the belt running the other way around. Sometimes the belt can cause noise if worn.

          Comment


            #6
            Went for run today with p.s pump belt off and no whine.
            To check myself I replaced belt and took a run and no whine.
            Ideally need to wait until whine reappears then remove belt I guess.
            I love these cars.
            Real bugger to drive w/o the power steering though.
            Keep you posted.
            cheers

            Comment


              #7
              I rebuilt my pump a few months back. I would think if the bearing is worn and u don't get to it sooner. u may wear out the Bush in the pump. not all kits come with that bush. that bush lubricated the pump shaft.

              Comment


                #8
                update
                spoke to the service provider that reconditioned my steering rack about the intermitent noise coming from my power steering pump.
                He suggested draining the mineral oil and replacing with Red Line synthetic oil fluid.
                A noticable differance with this fluid.
                The steering seems better weighted and more direct with this fluid.
                I would not have thought a different fluid would make any differance..
                But importantly no pump noise to report to date.
                fingers crossed.
                interested in anyone elses experience with change of pas fluids.
                cheers

                Comment


                  #9
                  What grade of Red Line synthetic oil fluid did you use?

                  Comment


                    #10
                    Red Line Full Synthetic Power Steering Fluid, nothing specific about grade on container.

                    No commercial interest in this brand, but thought a change to synthetic oil may be the real reason for improvement. Welcome others thoughts.
                    I still don’t know what caused the whine noise PAS specialist thought possible over heat problem.
                    ​​​​ To date going well.

                    Comment


                      #11
                      Originally posted by brian buttimore View Post
                      Red Line Full Synthetic Power Steering Fluid, nothing specific about grade on container.

                      No commercial interest in this brand, but thought a change to synthetic oil may be the real reason for improvement. Welcome others thoughts.
                      I still don’t know what caused the whine noise PAS specialist thought possible over heat problem.
                      ​​​​ To date going well.
                      I didn't realize they have an ATF fluid. I have their oil in my gearbox. For the price I'll stick with the regular stuff.

                      Comment

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