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15 Gallon Rear Tank Only Uses 12 Gallons.

Discussion in 'Early CJ5 and CJ6 Tech' started by Buildflycrash, Jun 18, 2020.

  1. Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    I figured out why.
    The tank is about 10” deep

    [​IMG]


    The pickup is barely 7.5”!!

    [​IMG]



    Tank is from ‘79 CJ
    Should I try to straighten out the bend?
    Put a piece of hose on the end?
    Am I missing a filter pickup part?
     
    Buildflycrash, Jun 18, 2020
    #1
  2. Jw60

    Jw60 That guy 2024 Sponsor 2023 Sponsor 2022 Sponsor

    I would expect a pickup "sock".
    A short length of hose with a metal T on the end might weight the hose down to the bottom and allow an alternate entry if debris is ever in the tank.
     
    Jw60, Jun 18, 2020
    #2
  3. Fireball

    Fireball Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    This is like my ATV, You just need to switch it out of reserve.
     
    Fireball, Jun 18, 2020
    #3
    Muzikp and ITLKSEZ like this.
  4. PeteL

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

    Jeep YJ has a 15 gallon tank but a 20 gallon was "optional."

    It was the same tank, just different plumbing.

    :susp:
     
    PeteL, Jun 18, 2020
    #4
  5. FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    wonder if someone used a pick-up for an underseat tank in the rear tank? When I installed a later rear cj tank, I bought the matching pick-up and it is a bit different (longer) than the underseat one, and works perfectly. The gauge works with either as is (although the float may need a bit of tweaking to 'calibrate').
    Honestly, I see you have a 79 tank - so maybe that is a bit different than the intermediate tank (?), but if its all the same, Walcks makes a decent brass float they put on the standard Omix unit:
    Fuel Sending Unit With Brass Float CJ5, CJ6 Rear Mount 1970-
     
    FinoCJ, Jun 18, 2020
    #5
  6. Norcal69

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

    You can get submersible fuel line. Cut the pickup tube off at the bend and use the submersible fuel line to extend the pickup. I had the same problem.... now when I run my rear tank out it takes 15.5 gals to fill it.
     
    Norcal69, Jun 19, 2020
    #6
  7. garage gnome

    garage gnome ECJ5 welder

    Just rebend the pickup tube?
     
    garage gnome, Jun 19, 2020
    #7
  8. Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    I'm a Moron. :oops:
    I looked in the box and found there was an extension/filter/sock thing. Going to have to jam it on harder than the last guy so it doesn't fall off in the tank. I'll look in the tank better for the old one as well.

    :shrug:
     
    Buildflycrash, Jun 19, 2020
    #8
    Muzikp and Glenn like this.
  9. PeteL

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

    Don't talk about yourself that way...

    ..let us do it!

    :rofl:
     
    PeteL, Jun 19, 2020
    #9
    Muzikp, tcfeet, Glenn and 1 other person like this.
  10. Glenn

    Glenn Kinda grumpy old man Staff Member

    Exactly! It's just not the same when people admit it themselves. :D
     
    Glenn, Jun 19, 2020
    #10
    Muzikp likes this.
  11. Maddevill

    Maddevill Member

    My mama always called me a "Fartsmeller".
    ....I think.....

    Mad
     
    Maddevill, Jun 19, 2020
    #11
  12. OzFin

    OzFin Vintage Jeep Guy

    Glad you got it figured out (y).
    It takes an honest man who has integrity to admit his "faux pas" to his peers .
     
    OzFin, Jun 19, 2020
    #12