View Full Version : tested ways of emptying mounted gas tanks


TheNeek
04-05-2008, 07:46 PM
Who's drained tanks while they were in the car? Should I try to get 12v to the fuel pump and drain the output into a bucket? Or should I stick to my original thought of undoing the rubber hose that connects the two connected tanks and let it come out that way?

Ideas are welcome.

jimdemonic
04-05-2008, 07:54 PM
I like your Idea of seperating the tank connector. But I think we should replace it with a T valve for easy draining.

Schnit
04-05-2008, 07:56 PM
Just pull the hose since you have to do it anyways.

Jester323
04-05-2008, 07:59 PM
once you dosconnect the connector pipe, you'll most likely need to replace it anyway, so I would just do that. If yours is stuck onthere as bad as mine is, you'll likely need to just cut it.

Draining with the pump would take forever.

TheNeek
04-05-2008, 07:59 PM
I'm thinking I might try and pierce it with a sharp piece of hose or something? Sounds like a big mess waiting to happen though. I have a replacement already.

kdanielson
04-05-2008, 08:09 PM
When I pulled the tanks in my '82 I removed the hose clamps and slid a thin screwdriver into the end of the connector hose which opened it up to drain into a pan. It was pretty easy to control the flow by moving the screwdriver in and out.

ken

DrewDude320i
04-05-2008, 09:03 PM
disconnecting the hoses is the best way, but you can take the in-tank pump out and siphon gas out through there. You'll probably miss a gallon or so doing that, though.

jjgbmw323
04-05-2008, 09:34 PM
Get ready for a great big mess. At least thats what I had when I took my tanks out. I cut the hoses and then replaced them. And the stuff that was in my tanks was FOSSILIZED!

And we took the tanks out. We had too, they where filled with stuff that was so far beyond fuel,
I could not believe it.

DrewDude320i
04-05-2008, 09:48 PM
i recommend taking out the in tank pump and siphoning the vast majority of the gas out, then disconnecting the hose connecting the two tanks. If you just cut the hose first, you're in for a big mess because you can't control where it goes as much. But if most of the gas is already out from siphoning, then you're good to go.

myersport
04-05-2008, 10:56 PM
I've always just ran the tanks low by driving, and draining the remaining fuel via the crossover hose.
--dennis

adamalexander
04-06-2008, 07:36 AM
Cut a hole in the bottom with a cutting torch, obviously

winstontj
04-06-2008, 10:49 AM
There are two lines, one is a return line (the one with a hose clamp) and the other is a high pressure feed line. Use a piece of plastic/metal pipe and another section of hose to splice a longer section to the low pressure return line.

jump the fuel pump relay from inside the fuse box and feed the return line into a tank. Even 12 gallons will only take a few minutes. If you care about the fuel inside the tank this is one of the only safe ways to do this IMO.