Quote:
Originally Posted by kerry edwards
I've also watched a person weld a fuel tank. The trick is to run the exhaust from a car into the tank while welding so it can't explode.
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That might work in a pinch, but it isn't as reliable or safe as the commonly-accepted methods of purging with CO2 (or another gas that won't support combustion) or having the tank cleaned at a radiator shop.