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Thread: Oil pump question

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  1. #21
    Obi Wan
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    Re: Oil pump question

    Hello John

    Thank you.
    Good to know that the hot bath is not destructive to the bush.
    I will take a look at the clearance on the washer and make a little more if necessary.

    David
    TR3A TS75524L

  2. #22
    Obi Wan
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    Re: Oil pump question

    The cheap modern gauge read about 5lb lower than the TR gauge.

    I think that I will order a sump gasket and oil pump gasket then check out the pump and bushings.

    David
    TR3A TS75524L

  3. #23
    Yoda CJD's Avatar
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    Re: Oil pump question

    I think I lost track of the goal here. Is it that the pressure is too low? If it is, then adjusting the regulator on the filter base is the way to go. I set mine using my air hose pressure regulator. Air flows easier than oil, so I set it just about 65psi on air. Sure enough, is sits right on the desired 70 psi on the car! If you reach a point where the spring is bottomed, valve closed, and the pressure is still low, then you have an excessive flow problem. Still, until you have tried to adjust with the regulator, you cannot be sure of the second condition.

    Also, every filter base I have rebuilt (and I have, like 3 ready to go), the ball and seat in the regulator were corroded. They all required new balls to properly set the pressure without over-flowing oil.
    John

    1955 TR2

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  5. #24
    Great Pumpkin TR3driver's Avatar
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    Re: Oil pump question

    I agree about checking the ball and seat, as that is another potential leak spot. But the function of the relief valve is to set the maximum pressure, which has been described as being just about right (70 psi). The relief valve should be already fully closed at idle.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

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  7. #25
    Obi Wan
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    Re: Oil pump question

    Hello John

    An update.
    Oil pressure on start up is 70+ which drops a bit as it warms up. After a drive of about 25 miles the pressure is down to 50ish and at idle it is below 20.

    I can remove the PRV and check for ball corrosion and the condition of the seat. I do have a spare so I can swap them out if I needed.

    Maybe being super sensitive to the oil pressure readings.
    David
    TR3A TS75524L

  8. #26
    Obi Wan
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    Re: Oil pump question

    I took the PRV out and took a look at the ball and seat. Both looked OK so I set up an air tester so I could see what was happening. Both the PRV from the car and my spare leaked despite having corrosion free balls and seats free of damage.

    I had some valve grinding paste and made a wooden grinding tool and attempted to clean up the seat. That did not seem to make much difference I decided to try lengthening the spring as the adjuster was bottomed out. With a little experimenting I got the right amount of spacing above the spring to hold air at 70lb but blow off at 75.

    Running the engine I have a higher pressure now. 80lb when cold but I think my gauge may be reading high by about 5lb. Have not driven yet but will report the results.

    David

    Pressure release valve setting e.jpg
    TR3A TS75524L

  9. #27
    Yoda CJD's Avatar
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    Re: Oil pump question

    So you're right where mine is...about 80 cold should settle right in to 70 warm.
    John

    1955 TR2

  10. #28
    Yoda
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    Re: Oil pump question

    Nice Job David, I wondered how someone could test, repair, and adjust those things. I always felt unsettled around them because I figured that one of the P.O’s at some point fiddled around with it. I plan on starting my motor this week and that is good information to have on hand.
    steve

  11. #29
    Obi Wan
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    Re: Oil pump question

    Hello Steve

    I had the adjustment bottomed out and it was blowing off at 55 to 60lb It also had a leak. Thinking about it later I feel that a small disc of 220 or finer wet and dry on the end of my pointy stick might have done a better job of cleaning up the seat.
    Make sure to clean all the abrasive out when you are finished.
    I added a 4mm socket head screw to increase the amount of compression I could get on the ball. The screw slid inside the spring and the head fit in the adjuster. With this setup I could get the pressure up over 80lb and adjusted it down and locked the adjuster

    David

    PRV2.jpgPRV e.jpg
    TR3A TS75524L

  12. #30
    Yoda CJD's Avatar
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    Re: Oil pump question

    I'm sure you noticed the factory used a lead seal around the adjuster after It was set. I just used a couple wraps of thin solder...and it seems to still be sealing well after several years of sitting/operation.
    John

    1955 TR2

  13. #31
    Obi Wan
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    Re: Oil pump question

    So that is what is around the thread. Looked like a mushed washer.

    I think I will reduce the setting about 5lb as it is above 80 when I first set out driving.

    David
    TR3A TS75524L

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