I'm considering relocating the filler pipe on my gas tank. Wondering, what have you guys used to thoroughly remove gas and fumes from the tank prior to welding?
I'm considering relocating the filler pipe on my gas tank. Wondering, what have you guys used to thoroughly remove gas and fumes from the tank prior to welding?
'73.5T -- ST replica project
Member #1045
Drain fuel using drain plug or pump it out with electric fuel pump. Pull tank, get rid of any remaining fuel. Hook up a hose that will fit over exhaust of another car/truck insert the other end in fuel tank (aluminum clothes dryer flex vent works well, you can mould it to fit on donor exhaust and to fit inside tank. Start car/truck let it's exhaust run into fuel tank for 5 minutes and your done. Leave space around the gas tank opening so exhaust can excape. Old hat works great.
Early 911S member #166
I have no problem with the theory that all men are created equal.
But after that moment you are on your own and nobody owes you a damn thing.
Wow... Thanks for the suggestion. I would have never thought of that. No danger of fire? I'm not doubting, just never been a fan of fire. :-)
'73.5T -- ST replica project
Member #1045
I never had a problem or anyone I'm aware of that has. I have seen it done this way by welders going back 30+ years. That said there is always a danger of fire when working with anything volatile. I'm sure other's will jump in and have other suggestions. I WOULD stay away from a exhaust donor vehicle if it had a propensity to backfire
Early 911S member #166
I have no problem with the theory that all men are created equal.
But after that moment you are on your own and nobody owes you a damn thing.
TWork,
After all of the above, throw in the tank some dry ice or blast it with a CO2 extinguisher just prior to welding. Dry Nitrogen works well also. If you are TIG welding, you have Argon available.
You want to eliminate two sides of the fuel-air-ignition triangle. You are providing ignition with the welding. You don’t want any fuel or air (oxygen).
Best,
Grady
Excellent. I'll give it a shot. What's the worst that could happen? I can always go back to the hunt and peck method of typing, right?
'73.5T -- ST replica project
Member #1045
I flushed out mine with water, and then used a heatgun set to low(then its heat is like a hairdryer). The reason I was not afraid of rust with using water was that I had it acid washed afterwords. I think if you dry it out quickly after flushing with water you wont have a problem with rust.
John
Early 911S Registry #931
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1971 911 2.2S Coupe Albert Blue
1971 911 2.2T Coupe Tangerine
2005 997 C2S Coupe special 1965 slate grey
1978 911 3.0 SC Targa Silver w/chrome trim
You can also pump it full of an "inert" welding gas.
Tom
Early S Registry #235
rgruppe #111
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