just be sure you are under a metal table when you first pass a torch thru fill hole. used to run vacuum cleaner hose from exhaust pipe of running car to tank-had a few go POOOF- dry ice might be better idea! let us know how it works out :thumbup:

 

An associate of mine digs up leaky tanks from gas stations and cuts 'em up for the scrap. He says dry ice works fine.

 

Had a guy actually weld on one of mine while it was still in the car.

Filled it with fuel-----welded the leak shut

 

JB weld doesn't count.

 

Its the fumes that are ignited, not the liquid itself. But I'm still not trying it just because.

 

If your using dry ice and putting it into water make sure the tank is vented. This means leave the gas cap off or something. If you mix dry ice with water and cap it off tight it can explode.

 

Quinte, are you still with us ??????

454 RATTLER

 

Its the fumes that are ignited, not the liquid itself. But I'm still not trying it just because.

In physics we learned that adding heat to a liquid will cause it to evaporate. Unless you can maintain the pressure inside that tank so that the gas doesn't boil..........

This is just another old school, tuff guy, eats asbestos for breakfast, method which will get more people killed than it will help.

 

I have welded many gas tanks. The one in my Willys is from some foreign car that held may 1/2 gallon but fit well un the tiny Willys frame. I split it lengthwise and added a couple inch wide sheet metal wedge and got a reasonable volume tank out of it. Key is to wash it out thoroughly with lots of water then duct tape up all the outlets except the one on top and fill it with water before starting the welding work. As long as there is no confined gasoline vapor/air mixture, there is no danger. The water load assures that is the case.

 

I worked in a garage years ago where we had an old German mechanic weld up many gas tanks. He removed them, dumped out the gas, then ran the exhaust from a running vehicle into the tank, thereby depleting the oxygen in the tank. It worked every time, first time I saw him light the torch I ran .....like he!!. Good luck.

ZAPPER

 

why not just solder it ? I,ve soldered many tanks. In fact, the last one, a '48 , I actually cut it half to clean it out, then soldered it back together.