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fuel leaking fillercap

Discussion in 'Early CJ5 and CJ6 Tech' started by juffer, Jun 21, 2009.

  1. Jun 21, 2009
    juffer

    juffer Juffer 2020 Sponsor 2019 Sponsor

    Netherlands
    Joined:
    Jun 16, 2007
    Messages:
    209
    can Anyone tell me how to solve the problem of a leaking fillercap? I replaces it for a new one but still when the car is on it side( not all the waY of course) it is leaking.

    any advice?

    Thanks Juffer:(
     
  2. Jun 21, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,371
    I fought with mine for years. The solution for me was a poly tank from MTS, and one of their gas caps. It seals perfectly now.
     
  3. Jun 21, 2009
    blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    Portland Tn.
    Joined:
    Sep 20, 2002
    Messages:
    3,586
    I had good luck with a cap from NAPA
     
  4. Jun 21, 2009
    cj6/442

    cj6/442 Sponsor

    Fallbrook, Calif
    Joined:
    Feb 6, 2008
    Messages:
    2,705
    well I have been working at this for a while now,,,the cap seals the opening , trouble is you need a vented cap .and thats where it's coming from. I am now running a cap from napa and I have welded up the main vent hole and pluged two of the side vents in the cap .2 are left...... I have run the jeep at speed and not starved it out yet.thinking of going for another hole. gas is so expensive now and the fear of fire (draging body across a gas soaked rock ,not good.) bought a roll over ball vent like the ones they use on buggys, but the trouble with those is it would have to roll and land upside down to block it off , land sideways and fuel would soak you......... please keep me posted on this one .Pat,,,,,, I don't see how the mts tank and cap will keep it in. is that cap vented?can you get me a pic
     
  5. Jun 22, 2009
    sdcj6

    sdcj6 Sponsor

    San Diego
    Joined:
    Sep 25, 2002
    Messages:
    333
    If you bought the roll over valve with pipe thread on the outlet, then run a hose from it into the air cleaner so that the fumes will be pulled into the carb. On a steep side hill the fuel will run up the long hose, but when you get back to level it will run back into the tank.
     
  6. Jun 22, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,371
    Well, it was vented. and for a while, it didn't leak fuel thru the vent. When it started, I JB'd the vent shut. I put an elbow high in the filler neck, and ran a 1/4" fuel line from there and loops up by the base of the roll bar, and comes back out thru a hole in the filler well above the cap, for a vent. Works very well.
    No pics tonight, but I'll try to remember to get some for you tomoroow if you want.
     

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