i wanna put a drain plug in my fuel tank so when i go to the track i can drain my gas and put racing fuel in .....and vice versa ...now the question is if i pull my tank drain all the fuel in the tank and fill it up with water ...will it be safe to weld a drain plug in the bottom .......?

 

interesting, the water won't allow for combustion as long as it's in contact with the metal being welded, but you'd have a hard time keeping the metal molten when the water is trying to quench your weld... and welding gas tanks is inherently dangerous

i found you an article though... http://www.hotrod.com/howto/70438_ga.../photo_01.html

in the article their main concern is the galvanization, the fumes of which are incredibly toxic, so make sure to grind off the galvanization before welding

 

thanks i will try this soon so if you guys dont hear from me for a while something bad happened......lol