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Unread 01-04-2012, 08:38 PM   #16
Crazyray2929
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Mechanics -- you can use J-B WELD with confidence. It is designed for safe, reliable, permanent repairs in engine compartments and heated environments up to 500 F. It's strong as steel and impervious to water, gasoline, chemicals, and acids. Working with J-B WELD is quick, easy, and convenient -- and saves you time, work, and money!

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Unread 01-04-2012, 09:22 PM   #17
rsg1963
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Quote:
Originally Posted by Hybrid Jeep View Post
Hey Man.. I had a 1974 J10 and the exact same thing happened to it. One day it was like.. oh crap the fuel tank is leaking everywhere!! It turned out that the rubber fuel lines had cracked from age dumping fuel all over the tank. It gives the impression that it's leaking everywhere, but really it's just spraying out of those cracks in the hose.

I'd replace those first before you get too carried away with replacing the tank. While you have the tank dropped you can also give it a good look over. New replacement tanks aren't that expensive if you find problems.
^^^Excellent advice. Rep points!
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Unread 01-04-2012, 10:47 PM   #18
BagusJeep
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How does it work?

"J-B WELD is packaged in two tubes. One contains liquid steel/epoxy resin, and the other contains hardener. When mixed together in equal portions, a chemical reaction occurs that turns the mixture into a compound as hard and tough as steel -- and with similar properties."

Never tried it with a magnet or tried to weld to it but come on, this is not really steel.

I don't have anything against it as a product (it holds my gearshift together) but it is a point repair. If you had a puncture in the tank from a nail it would be great as no welding needed (not a good idea on a petrol tank) but if the tank is near the end of its days it will not just be a single point, the tank will devlop further pin holes.

A tank sealant will be sloshed around inside the tank and coat the entire interior surface. This is the right product to use for an old tank that is past its sell by date, such as old motorcycle tanks.
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Unread 01-05-2012, 07:17 AM   #19
lucdog
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Quote:
Originally Posted by Crazyray2929
Mechanics -- you can use J-B WELD with confidence. It is designed for safe, reliable, permanent repairs in engine compartments and heated environments up to 500 F. It's strong as steel and impervious to water, gasoline, chemicals, and acids. Working with J-B WELD is quick, easy, and convenient -- and saves you time, work, and money!
Doesn't it say on the package. Can be handeled in 8 hours or so. And cured in 24.
This stuff does work. I used it on a cracked block, to seal a water leak ( exterior, drivers side, close to the motor mount, 1' long) lasted for a year before starting to seep again.

Bill
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Unread 01-05-2012, 12:15 PM   #20
jamie0921
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I tightened all my hoses it helped a lot I've got 2 very small leaks now and I already have jb doom going to use it and the tanks brand new it should be fine I hope
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Unread 01-05-2012, 01:46 PM   #21
Hybrid Jeep
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Was it actually leaking from the tank? I'm surprised to be honest. Instead of tightening those hoses, replace them.. they are.. what.. almost 40 years old!
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Unread 01-05-2012, 02:06 PM   #22
jamie0921
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Just a few months old I've framed off restored everything is new
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Unread 01-08-2012, 09:04 AM   #23
gunrun45
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I've tried JB weld many times on metal tanks. Even with excellent prep, I consider it an emergency or stop gap fix. The gas will dissolve the contact layer of JB weld in a month a best. I recommend using the gas tank patch kits available at your local auto zone and such. They will include a fiberglass patch and epoxy resin designed to better stand up to the gas. If its near your exhaust at all I'd recommend a s thin I heat reflective tape over the top also because any extreme heat will degrade the epoxy and ruin the bond.

New metal tanks can be had for about $150 online with a sending unit from eBay.
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