Spit tank when hammering

[CJmaxim]

really enjoy dtt, & figured i'd post a question about my build.
I've been working on fitting a CB 750 tank on my 81 maxim550. While pounding in the tunnel to fit the maxim, I seemed to have split the metal.

How long would I expect JB Weld to last?

The other options I can think of;
1. I live at a big recreatioal lake with docks on the water, lots of boat lift repair guys that tig weld (this is probably my best option but havent talked to anyone yet).
2. Radiator shop (this is a dying breed & hard to come across).
3. I've got a 220 mig but can't seem to gather the stones to weld on a gas tank. + it's hard to not bast throughthinner gage steel.


I'd like to try the jb weld first cause, honestly, its cheapest.

Opinions??

 

[Sonreir]

New tank?

 

[rockcitycafe]

jb weld isn't a solution.

 

[Kanticoy]

It needs welded man, don't skimp on the tank, it is too important a piece.

 

[bradj]

Hammering split tail

 

[CJmaxim]

It's about 3/4" split.

Is brazing or solder an option for something like this? I know a good heating/cooling guy that I can maybe convince to braze over several sections of the tank. I had to pound in the tunnel in 6 areas (3 on each side of the tunnel) in order to clear the frame. I'd like to "coat" each of these areas just for piece of mind.



Just to show it's real.

 

[Swapmeet Louie]

Brad will hate me for saying this... But braze, its always a good option for cracked tanks.... torch + $5 pack of rod... fixed Ive done/do it anytime. Good enough for triumph and BSA frames = good enough for a tank. and the positive is it wicks Like sweating a pipe joint.

 

[Swapmeet Louie]

And for the record I've brazed whole new tunnels in tanks. All the above have seen it! never had problem...

 

[CJmaxim]

Good to know. With brazing, can I cover the whole area I pounded on? If it wicks like you say, that sounds the most optimal. + it may fill other tiny cracks I may have created.

 

[Swapmeet Louie]

I guess you could... but why if its not cracked. It wicks to hot metal. so, you would need to make a glob in one spot. And then heat where you wanted it to go. I dont know if I would actually "recommend" that. Ive never coated a spot in hopes of filling an unknown hole or crack. Ive only used it to join metal.

 

[ApriliaBill]

Welding a gas tank sounds scary, but my dad would empty the tank (obviously), leave the filler cap off, remove the petcock, then run a hose from the exhaust of his truck to the tank. Remember fire (explosion) needs three things, ignition, air and fuel. The carbon dioxide will kill the air in the tank. I saw my dad do this dozens of times and never once did a tank explode...

 

[Swapmeet Louie]

welding Is the best option Im never gonna argue that. Alls Im saying is 2nd best And most people are lacking 1 of 2 things. Either skill or tool.

 

[Swapmeet Louie]

And it's no scarier than a torch! if it is, it's purely personal...

 

[cyclefreak]

Tig, braze, or Mig are all fine. JB weld to repair a cracked tank NEVER! One other tip, drill a small hole at the ends of the crack before repairing. This will make it much harder for the crack to spread.