just curious, do you guys back purge the tank while welding this on

 

I am really curious on how to do this I am interested in sumping my stock tank any info...please would help

 

i purged a motorcycle gas tank i welded with argon. i just duct taped a hose into the filler hole and had it running off a bottle.

 

Last time I saw a guy welding on a [used] gas tank, he had it mostly full of water to a) displace any fuel vapors and b) less volume to purge. Not sure if this is proper welding procedure though, your mileage may vary.

 

When I did my tank I first cleaned it out with soap and water an I then I let it sit open to make sure you get the flumes out cause that's what will catch fire. Then I c over most of the openings one the tank and run a purge hose and fill the tank with argon gas. The argon will protect the weld from the in side of the tank and will keep the tank from blowing up. Or you can take the tank to your local radiator shop and they can gas free it for you for a few bucks. Then you can just weld it after they clean it.

 

i did not purge mine...the radiator shop that cleaned it out and pressure tested it for me commented on how much nicer it turned out than another one of the shops that does a lot of work for some of the "bigger" name guys around here......the one i say that they did looked like ****, was welded WAY too hot, no way it was purged, and even looked like they burned holes through it and filled it.



ignore that other bung, its plugged

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">i did not purge mine...the radiator shop that cleaned it out and pressure tested it for me commented on how much nicer it turned out than another one of the shops that does a lot of work for some of the "bigger" name guys around here......the one i say that they did looked like ****, was welded WAY too hot, no way it was purged, and even looked like they burned holes through it and filled it.



ignore that other bung, its plugged</TD></TR></TABLE>

You know you welded the bung on but not the sump. Quit lying to yourself!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">i did not purge mine...the radiator shop that cleaned it out and pressure tested it for me commented on how much nicer it turned out than another one of the shops that does a lot of work for some of the "bigger" name guys around here......the one i say that they did looked like ****, was welded WAY too hot, no way it was purged, and even looked like they burned holes through it and filled it.



ignore that other bung, its plugged</TD></TR></TABLE>very nice job man!

 

How did you go about cutting it for the sump?

 

that looks really good joe

 

dont cut it!!!! you drill holes....if you get the full race sump it comes with directions and exact measurements......its pretty much idiot proof....however htat other shop i mentioned aparently ignored the directions and screwed it up pretty good. not sure how they managed that.

basicily you use a specific size hole saw (forget the size, its listed in the instructions) and follow the measurement directions that come wtih the sump, and your good to go. the hardest part of the process is cleaning all the funk off the bottom of the tank so that you can weld it.

 

looks good

 

What did you use to clean the tank off? thanks for all the info I thought it was going to be harder then that. Now you TIG weld it right if so thats awsome cause I have a guy welding my cage in my car and I know he would do it for me..
and to think I was going to skip this...what do you use to block off the old pump spot..