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My Dauntless Ate A Valve.

Discussion in 'Early CJ5 and CJ6 Tech' started by Buildflycrash, Jul 20, 2021.

  1. Jul 28, 2021
    Steve's 70-5

    Steve's 70-5 Active Member

    Louisville, Ky
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    I hear John Force is looking for a mechanic. (y)
     
  2. Jul 28, 2021
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    Gulf Breeze FL...
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    Put fenders back on this morning after a work call and email. Just back from test drive. It was WORSE then with hole in piston!! Checked plug wires and found 3-5 crossed. Going to take Cynthia and dogs up in the hills for a hike (in truck) and test again later.
     
    3b a runnin and Twin2 like this.
  3. Jul 28, 2021
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
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    How was the oil pressure?
     
  4. Jul 28, 2021
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    Gulf Breeze FL...
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    About normal. Which is Low when warm.

    I did do a second short test drive. Ran much better but Power is definitely off from Dauntless standards. I should have spent more time grinding on the head to get a better seal. That value seat was messed up. As long as it doesn’t blow up again I think I’ll be able to keep up with the rest of the old Jeeps next week.
     
    Last edited: Jul 28, 2021
    Zoomer, FinoCJ, Jw60 and 6 others like this.
  5. Jul 29, 2021
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
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    Well, you've lost 30% of your power being at 10,000 ft elevation, and 1/6 of your power with that cylinder, so....

    Edit- does that cylinder have any compression?
     
  6. Jul 29, 2021
    Jw60

    Jw60 Cool school 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Sedalia MO.
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    Good news is there is less wind resistance with elevation.
     
  7. Jul 29, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    Still more power than a 4cyl would have...in lo range it don't matter. I can bring a compression gauge if interested to test cylinder.
     
  8. Jul 29, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    But a CJ5 is so aerodynamic! :lol:
     
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  9. Jul 29, 2021
    jzeber

    jzeber Well-Known Member 2022 Sponsor

    Morgan Hill, Ca
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    Can't wait to get the reports on how it does on the trip! (y)
     
  10. Jul 29, 2021
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

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    I think I’d rather not know.
     
    FinoCJ likes this.
  11. Jul 29, 2021
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
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    Glad you got it going. I think my fhead rubbed off on your dauntless. :lol:

    Welcome to the raggedy engine club. You get to be the caboose and see what lines not to take. (y)
     
  12. Jul 30, 2021
    4S50

    4S50 I’m back!

    Idaho
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    Amazing camp ground repair! Great work.
     
    Buildflycrash likes this.
  13. Jul 31, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    (y)

    Before this is over, I want to see you making a piston from a pine tree, using your jacknife.
     
    Twin2, wheelie and Buildflycrash like this.
  14. Jul 31, 2021
    jackdog

    jackdog Member

    Finger Lakes NY
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    This was my major concern. Glad you got it going.
     
  15. Aug 3, 2021
    Zoomer

    Zoomer eJeeper (walking)

    Minnesota
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    So is it running the trails with the group???
     
  16. Aug 3, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    Yup!
     
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  17. Aug 3, 2021
    Rich M.

    Rich M. Shoe salesman 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Maryland
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    The 5 hitter is chugging along.
     
    47v6 likes this.
  18. Aug 4, 2021
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

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    Drove “down” to Buena Vista about 40mi at 55-60mph glad I was able to get a trailer ride back “up” to Leadville. Plenty of power for the trail but not so much at high speed up hill or up wind.
     
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  19. Aug 8, 2021
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

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    Plenty of power for off-roading. Spinning all 4 wheels.
     
  20. Aug 8, 2021
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    I'm glad you were able to get it to run so well!
     
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