Is it still any good?

[nvshooter]

A friend told me I can push the old gasoline out of the tank by pressurizing it to a few psi with an air compressor. I have one. Hook-up a piece of hose to the exit fitting on the fuel pump, pressurize the tank and slowly push out the gas. My worry now is if there is some sort of one-way valve that prevents a return flow of unused gas to the tank.

 

[1971Chevelle]

I would not hook it up to the output side of the fuel pump. Undo the inlet side and do it that way.

 

[nvshooter]

I would not hook it up to the output side of the fuel pump. Undo the inlet side and do it that way.

I understood my friend to say to wrap a rag around the nozzle of the air compressor and use that to seal the filler opening of the fuel tank. The outlet side of the fuel pump will have a piece of hose on it that will go into an old anti-freeze bottle. I'm wondering how much I'll get. I suppose there is a sump in the tank that may hold a gallon or two...

 

[1971Chevelle]

If you do it on the outlet side of the pump, you risk getting debris lodged in the pump. That is why I would hook up to the inlet side. Applying air pressure to the tank may dislodged stuff and send it forward.

 

[nvshooter]

Applying air pressure to the tank may dislodged stuff and send it forward.

Now you've got me fretting about that! It's a new tank; installed in Fall 2011. Should still be pretty clear of schiff on the bottom...