Leaking Fuel Out of Gas Cap

Tom in Iowa City · Mar 16, 2009

1941 Farmall A.
Have original gas cap.
Just put on a new gasket (rubber).
Fuel comes out periodically.
Today, sitting still...fuel "bubbling out" slowly.
Venting problem?
Hate to paint tank before problem fixed.

Janicholson · Mar 16, 2009

Get the tall cap. Sorry there is no cure. Vapor pressure of todays fuel is substantially higher than days of old. the flanges on the tank can be a problem, there is a tool to fix them. Search the archives. The original short caps leaked from day one and periodically shot a streem of fuel into the air. Avoid filling closer than 2 inches from the neck, and get the tall cap. JimN

Anonymous-0 · Mar 16, 2009

search the archives for "Free gas cap"

Yugrotcart · Mar 16, 2009

Here's a link.

Paul
IH Gas Cap

Cue P. · Mar 16, 2009

I agree. With the old style cap I had fuel leakage if the tank was above 1/2. I liked the look of the lower profile cap but didnt feel like torching the newly restored girl anytime soon. No leaks at all with the tall cap.

mkirsch · Mar 17, 2009

Apparently some people have been burned, along with some tractors, by the fuel leaking/squirting out the low fuel caps. That's why even to this day Navistar (IH's old truck division) is giving away the free gas caps.

scotc · Mar 17, 2009

My SM filler neck is goobered up, someone gave me a tank with a good neck. Only trouble is I'll lose my gas guage. When the gas stops seeping out under the cap it's time to go get a can.

Leaking Fuel Out of Gas Cap

Tom in Iowa City

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Janicholson

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Anonymous-0

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Yugrotcart

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Cue P.

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mkirsch

Well-known Member

scotc

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