Originally Posted by Curmudgeon29
I tried that. I took a small radiator overflow tank and filled it with activated charcoal, starting smelling gas after a short while again. Besides, if you don't have a way to purge the fumes from the tank, seems like you've just built a bomb!
If you're still smelling fumes after passing these fumes through an activated charcoal canister, a few thoughts come to mind- since a correctly sized fresh activated charcoal filter will remove gas smells:
the canister isn't big enough, or has old, gassy charcoal in it
the fumes are coming from the cap or some other place than the vent line- like a cracked rubber connection between any of the gas or vent lines to the tank
As far as a bomb goes, most any gas tank has an explosive atmosphere inside it. Using a charcoal filter is less of a hazard than venting the fumes into the air I would think.