Gas tank repair

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i8sand

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Has anyone successfully repaired a crack in their gas tank ? If so, what did you use ?
I have a crack at the base of my filler neck and was hoping to plastic weld it rather than drop $1100 on a new tank. Looking for proven suggestions before jus slapping some JB Weld on it.
It is located at the base of the filler, so it is not submersed or weight bearing. It is more of a issue when gas sloshes. Thanks
 
Radiator shops used to do this kinna thing all day. But all the ones I know stopped those repairs awhile back.

Maybe someone knows a shop still doing it?
 
My Jeep LS fuel system adapter kit from Novak used Permatex #1 to seal a bulkhead fitting. Held fine so far.

Biggest question is: how’d it crack?
 
I did the one on my commander years ago, it cracked where the bracket was welded on. Pulled the tank, cleaned it a few times threw a match in just to verify it wasn't gonna explode.😁
 
Joe welds them at Glamis Fab. We would tell people to pull the tank, rinse it a few times then rinse it again!!! He would tell them we're going to put a torch in it and if it splits you are responsible for the damage so rinse it good!!!

Some would purge the tank by putting the neck up against an exhaust pipe (truck) after they rinsed it.

Some would go boom!
 
What type of material is the tank? Steel or Aluminum? Should be easy enough to weld it around the base of the filler neck. Although JB Weld would likely hold for quite some time if you get it clean first. Fill and rinse the tank several times if you are going to weld it. And I would fill it with water to just below the filler neck and leave the water in while it's being welded.
 
JB weld most likely will not stick. Try it on some other spot on the tank, after it cures hard you can probably just pull it off of the side of the tank.
Plastic welder should do the trick. It's just melting the plastic back together. Harbor Freight has a cheap one, I just use a big soldering iron using zip-ties as rod if needed. You can also get some metal screen (window or screen door type) and soften the area around the crack and push it in to reinforce the area kinda like rebar in concrete, then go over the top with more material.
Also no flame so very low risk of tank going boom, but I would still wash it out
 
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