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Dauntless Oil Pump

Discussion in 'Early CJ5 and CJ6 Tech' started by colojeepguy, Jul 13, 2021.

  1. Jul 13, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    I recently developed a serious oil leak at the oil pump mounting g gasket. Pulled it apart today to replace the gasket. What do you guys think of the condition of everything else? There is some wear on the timing cover, but you can barely feel it with your fingernail.
    20210713_085448.jpg

    20210713_090035.jpg

    20210713_091113.jpg

    20210713_085513.jpg

    I'm inclined to just replace the gasket and run it...this is a 160k miles original engine so it isn't going to last forever anyway....when it's time for a rebuild I'll replace all the pump components.
     
  2. Jul 13, 2021
    Twin2

    Twin2 not him 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Virginia Beach, VA
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    if it had oil pressure before . I would run it
     
  3. Jul 13, 2021
    Daryl

    Daryl Sponsor

    Bonney Lake, WA
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    The kit is cheap and comes with a gasket. No sense to not change it while apart. Melling k201.
     
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  4. Jul 13, 2021
    txtoller

    txtoller Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Weatherford, TX
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    This!
     
  5. Jul 13, 2021
    Mr Vaughan

    Mr Vaughan Fly by the seat of your pants

    Central City, NE
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    better safe than sorry
     
  6. Jul 13, 2021
    Rich M.

    Rich M. Shoe salesman 2022 Sponsor

    Maryland
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  7. Jul 14, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    FSM says to pack the pump with petroleum jelly so it will prime...is this still the preferred method?
     
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  8. Jul 14, 2021
    Keys5a

    Keys5a Sponsor

    Florida Keys
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    Yes, I still pack the housing with petrolium jelly. Those wear plates linked in post 6 only address the bottom side. Most of the wear occurs inside the timing cover side. I often resurface the bottom filter plate with fine sandpaper on plate glass. Put a fresh set of gears in the pump and reassemble.
    -Donny
     
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  9. Jul 15, 2021
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Doug - prime it with a drill helps on the start up as well - makes sure to have oil flowing. You can see it come out the lifter posts when you spin it up, or register on a mechanical gauge.
     
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  10. Jul 17, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    Do I want the 40 psi spring or 60? 20210717_102246.jpg
     
  11. Jul 17, 2021
    Rich M.

    Rich M. Shoe salesman 2022 Sponsor

    Maryland
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    Ime 40 is sufficient.
     
  12. Jul 17, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

    Denver, CO
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    I went with the 40psi when I did mine - this was after discussion with the engine shop that did the machiine work etc....I'd give you the reasons why we decided that, but I don't remember...I just remember the final decision and I have the stiff spring labeled and on the shelf.
     
  13. Jul 17, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    Well, the 40 psi spring is in...new pump gears, gasket and wear plate. No leaks so far !
     
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  14. Jul 17, 2021
    Jw60

    Jw60 WRPD855 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Sedalia MO.
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    I have no idea what spring we used on the 69 but that whole job is miserable with the engine in the jeep. Glad it went smoothly for you!
     
  15. Jul 17, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    I pulled the RF fender off...made it fairly easy
    (y)
     
  16. Jul 19, 2021
    Montgomery J Yarbrough

    Montgomery J Yarbrough New Member

    Lander wyoming
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    Put new gears and check clearance if good pull gears and block sand gasket surface on both sides clean good reasemble my engine fully rebuilt idles at 14 psi cruising well over 30 bearing clearance was spot on I say block sand the pump housing gasket surface cause on mine after assembly it leaked a little bit I unbolted it blocked sanded both surfaces reassembled torqued to spec and wall lah no leak good luck
     
  17. Jul 20, 2021
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    New Kent, VA
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    So on my fresh rebuild, the machine shop put the engine together and primed the oil system through the distributor. I'm pretty sure the oil pump does not have petroleum jelly. The engine has been sitting for ~6mo, but I'm about ready for a first start. Is it worth taking the oil pump apart and gooping it up with petroleum jelly, or just prime the oil system again?

    OP, sorry if this is a highjack, I thought it would be relevant to this thread.
     
  18. Jul 20, 2021
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    I would prime it again.
     
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  19. Jul 20, 2021
    Daryl

    Daryl Sponsor

    Bonney Lake, WA
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    Absolutely the 40. The higher pressure spring makes the motor leak everywhere. These motors were always low/no oil pressure motors.
     
  20. Jul 22, 2021
    fhoehle

    fhoehle Sponsor

    Harford Township, PA
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    Prime with drill, no need to repack
     
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