JB Weld on a fuel syste, repair

[V8guy]

Planning on doing a repair on my 1935 hydrostatic fuel gauge sender over this winter. Will the fuel soften the JB Weld if submerged in fuel tank has anyone used it for ruel system repairs ??

[Steve51]

It is a common fuel tank repair solution. I used it when the vent tube solder joint started leaking on my Galaxie.

[farmertom]

Originally Posted by V8guy

Planning on doing a repair on my 1935 hydrostatic fuel gauge sender over this winter. Will the fuel soften the JB Weld if submerged in fuel tank has anyone used it for ruel system repairs ??

v8 guy,there is jb weld on outside bottom of the tank and on filler neck joint on my '37 but dont know about anything about something submerged in fuel. mr. Google might know. Tom.

[paul2748]

Check the product and see if there is some sort of tech line you can call. Or check for a web site that may give you some info.

[hueyhoolihan]

drop a glob of it in a container of gas and keep an eye on it for a few weeks?

[50fordcoupeman]

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JB is an epoxy. Safe for gas repairs in my opinion.

[Eagle43]

I fixed a hole in a gas tank with JB weld. It started leaking again about a year later. Solder works better but be careful.

[John Gibson]

IF you are going to solder or weld a gas tank fill it with exhaust fumes first! Gasoline can’t ignite or burn without oxygen and there isn’t much in the exhaust fumes.

[glennpm]

Decades ago I watched the repair of a pin hole leak in a gas tank. The area around the hole was cleaned and flux applied. Then the guy heated up a coin held with pliers and melted a blob of solder to it. He immediately pushed it over the pin hole. The solder held and that was all that was needed to make a permanent repair.

[Jack E/NJ]

TankWeld is a 2-part putty. A bit harder to mix and work with than the cream. But it shouldn't soften as much as the cream when submerged in gasohol.

[Kube]

Originally Posted by glennpm

Decades ago I watched the repair of a pin hole leak in a gas tank. The area around the hole was cleaned and flux applied. Then the guy heated up a coin held with pliers and melted a blob of solder to it. He immediately pushed it over the pin hole. The solder held and that was all that was needed to make a permanent repair.

Ha! You bring back memories! I have purchased cars with this exact repair. Kind of ingenious...

[19Fordy]

Glenn: I like your "soldered coin" idea. Canadian pennies are still made from copper, unlike the USA.

[Kube]

I think many of you guys' lost sight of the fact the original poster is going to repair the sending unit, NOT the tank.
As this repair is being done on the sending unit it would be an easy and quality repair done by soldering. No need to worry about any adverse interactions between a sealer interacting with fuel.

[glennpm]

Originally Posted by Kube

Ha! You bring back memories! I have purchased cars with this exact repair. Kind of ingenious...

Yes, a great trick and it sure impressed me and it only cost a penny and a bit of solder and flux :-)

[mfirth]

I'm with Kube, pull it, solder it, reinstall, done.

[glennpm]

You should be able to repair without pulling the tank.

[Bruce of MN]

Originally Posted by 19Fordy

Glenn: I like your "soldered coin" idea. Canadian pennies are still made from copper, unlike the USA.

I thought Canada dropped pennies ~20 years ago?

[Ziggster]

Stopped making pennies in 2012 and the $1 bill in 1989.

[glennpm]

Note that you don't need to use a copper coin, any will do. The object is to solder the tank pin hole. The hole is tiny with almost no pressure and none for a vented tank other than the fluid head of the gasoline. There is no structural benefit in leaving the coin attached.

[Joe B.]

glennpm, Thanks for the valuable archival links.