Fuel Leaking From the Vent Tube

Fuel and Air Systems

  1. rockdog2112

    rockdog2112 Well-Known Member

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    Hey guys,
    I have fuel leaking out of the vent tube and when I take the gas cap off, it gushes out of the tank like it's pressurized. Is the tank not venting properly? Any thoughts or ideas? Thanks, Joe
     
  2. dmartin

    dmartin Well-Known Member

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    Yeah they usually are attached to two hard line vent lines that run along the rear deck I was having that problem till I took a 3/8 rubber line and just connected them together at the rear of the tank


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  3. 69hemibeep

    69hemibeep Sponge Bob Square Wheels

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    It sounds like pressure. You don't have a short exhaust system warming the tank up do you? I would take the two vent tubes loose and blow compressed air threw them
     
  4. mac

    mac Well-Known Member

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    here is a link with a discussion on this topic.

    http://a12mopar.com/yabb/YaBB.pl?num=1238949100/0
    inside_tank_zpsaw4tser6.jpg


    the short external vent line goes on the long internal vent in tank. the long external vent line goes to the short internal vent in tank. i personally had a problem with the long internal vent pipe. it had become loose and would lay below the filler neck. when tank was full both vents were below the gas and vapors would pressurize tank and push gas out of short vent tube making a mess. if i was not careful taking filler cap off i would get a lot of pressure releasing from tank.
     
  5. 69hemibeep

    69hemibeep Sponge Bob Square Wheels

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    Mac, how did you get into that tank :lol::lol::lol: I also understand some of those lines got reverse on the after market tanks. It's best to look before putting the neck on
     
  6. mac

    mac Well-Known Member

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    just used my lighter and phone.:crazy:
     
  7. rockdog2112

    rockdog2112 Well-Known Member

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    Ha!
     
  8. dmartin

    dmartin Well-Known Member

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    That's an old coyote trick!


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  9. droptop

    droptop Well-Known Member

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    :basketcase::basketcase::basketcase:
     
  10. cbusters

    cbusters Member

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    I have been told that the repop fuel tanks have the lines switched inside the tank. Mine does it also when it is on a hill. One day when it is up on the lift I am going to cross the hoses.
     
  11. roadrunnervet

    roadrunnervet Active Member

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    that is correct.repop tanks lines are switched inside.i have researched that myself i put in a new gas tank and lines recently and found that to be true,you have to put long vent tube on the short inside tube and short vent tube on the long inside tank tube,that will stop the fuel leak.
     
  12. ricks_RR

    ricks_RR Well-Known Member

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    the shorter tube that go's just above the rear end make sure that it is high enough that is won't siphon out. the curve on it should be as short as possible
     
  13. Coyote

    Coyote Well-Known Member

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    Harumph! If I was doing it I’d have used a torch for illumination!:bananahit::poke::beep:
     
  14. quikbird

    quikbird Well-Known Member

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    now that I believe!!!! :nutkick:
     
  15. Goon

    Goon Well-Known Member

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    the short exhaust & new tank are probably my issue. Have full 3" TTI exhaust now(haven't run it yet) now i'm going to have to take a look in the tank to see vent lines(Mac can you get in my tank for me--LOL)
     

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