What should I use as a replacement for the fiber washers that seal the flanges for the supply and return lines on the gas tank? Aluminum or copper crush washers maybe? Anyone BTDT?

I am hoping it is something I can find at ACE.

I used some aluminum crush washers I got at the foreign auto parts store, they work fine.

The factory fiber ones are NLA.

Ed

Thanks Ed, that is my plan as well. Copper should work ok too, right?

Right.

Ed

I used nylon on mine. So far so good.
Cheers, Elliot

I found some copper sealing washers that fit at Kragen. They are in the HELP kits and intended for brake line seals. I will hopefully get the tank hooked up tomorrow and will check for leaks.

Well that didn't work. Both fittings leak. And I found out after putting the tank back in. I guess the copper washers weren't good enough. I think maybe they were too thick and did not crush enough. What I really need are some of those thin aluminum crush washers like used on the oil drain plug. But where can I buy them in the right size??

HELP!

Well, I wound up eliminating them completely. I found that the I.D. of the tank bungs is just about the right size for a 3/8 (or 1/4 maybe,forgot which one?) NPT tap. So I threaded the insides of mine and then added threaded 90° elbows with fuel barbs on them. They have been that way for 3 years now with no leaks. You may wanna try that .

Ed