Leaking gas from vent line

Ken56 · Oct 13, 2020

I'm leaking gas from the vent line on my 68 RR. I have maybe 3/4 tank of gas. Anyone know what can cause this? Thank you in advance.

dadsbee · Oct 13, 2020

Lines are reversed? Vent tube that goes right up to beside the filler neck inside the tank should be hooked to the shock tower vent, the short vent tube in the tank should be hooked to the vent that runs up into the trunk.

If they are hooked up correctly, the trunk vent tube could be plugged.. tank gets hot, pressurizes and pukes fuel that's inside the other tube out at the shock tower.

Billccm · Oct 13, 2020

Mine does it on hot days. If I burp the tank by cycling the cap it will stop. I think it is the capillary effect of the vent.
@Dennis H has a fix for this.

Ken56 · Oct 14, 2020

Thank you guys for your help and quick response. I think I have the lines reversed like @dadsbee stated. I'll check for that and a plugged vent line later today.

69_Coronet · Oct 14, 2020

At least some of the aftermarket fuel tanks have the vent lines reversed inside the tank (mine were). I had to swap the connections between the in tank vent lines and the external vent lines when I installed the new tank. Doesn't look great, but I only have to look at it when I am under the car. Cheers!

Ken56 · Oct 15, 2020

69_Coronet said:
At least some of the aftermarket fuel tanks have the vent lines reversed inside the tank (mine were). I had to swap the connections between the in tank vent lines and the external vent lines when I installed the new tank. Doesn't look great, but I only have to look at it when I am under the car. Cheers!

I'll have to check for that too. Thanks for the info

Leaking gas from vent line

Ken56

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dadsbee

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Billccm

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Ken56

Well-Known Member

69_Coronet

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Ken56

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