C2 gas filler neck sealant?

[Dan H.]

Have had a 'dribble' from my 64 gas tank when filling to top of tank. Checked and sure enough it is leaking from the base of the filler neck. I ordered a new gasket but I'm wondering if there is a 'sealant' I should also use with the new gasket. Checked archives and couldn't find a reference to the sealant if used. Thanks in advance!
Dan

[Wayne M.]

Re: C2 gas filler neck sealant?

Have had a 'dribble' from my 64 gas tank when filling to top of tank. I ordered a new gasket but I'm wondering if there is a 'sealant' I should also use with the new gasket. Dan

Dan -- Also, the '65 AIM show no sealant; just the cork gasket. Mind you, the "screw assemblies" for the neck-to-tank connection have a plastic (?) gasket that will help.

Installed a new gasket on my '65 convertible a few months ago, and I used a light coat of Permatex 'Ultra Black' gasket glue, only on the tank side of the gasket, more to hold it in place if I ever have to remove the tank again (as I don't think one can get it out with the neck still on).

Haven't filled it up to check though.

[John H.]

Re: C2 gas filler neck sealant?

Wayne -

You don't have to remove the filler neck to get a convertible tank out, but you do on a coupe.

[Joe L.]

Re: C2 gas filler neck sealant?

Have had a 'dribble' from my 64 gas tank when filling to top of tank. Checked and sure enough it is leaking from the base of the filler neck. I ordered a new gasket but I'm wondering if there is a 'sealant' I should also use with the new gasket. Checked archives and couldn't find a reference to the sealant if used. Thanks in advance!
Dan

Dan-----


I love cork-----the feel of it, the look of it, the smell of it. I'd probably even like the taste of it if I were to eat any. However, I don't like it for the filler neck gasket. It tends to "dry out", displace, and leak over time. I used a sheet of buna-n gasket material about 3/32" thick to make my own gasket. "Bullet-proof".

[Dan H.]

Re: C2 gas filler neck sealant?

Thanks Joe, is the buna-n material available at Napa? Are there seals on the screws also? Been a long time since I had one apart! My old 63 started leaking but I just put another cork job on it! (in 1986)
Dan

[Joe L.]

Re: C2 gas filler neck sealant?

Thanks Joe, is the buna-n material available at Napa? Are there seals on the screws also? Been a long time since I had one apart! My old 63 started leaking but I just put another cork job on it! (in 1986)
Dan

Dan-----


It's been a long time since I did this. However, I think I had to go to an industrial supply vendor to get the buna-n material. I doubt that you'd find it in an auto parts store.

There are integral seals on the screws and I suggest replacing these screws. They are GM #3767804 and remain available.