Sealing filler neck at gas tank
 

Please tell me the best product to use to seal the filler neck at the gas tank on my 37 pickup. Just started leaking.
Thank you

Re: Sealing filler neck at gas tank
 

A liberal coating of non-hardening Permatex always did the trick for me.

Re: Sealing filler neck at gas tank
 

I believe you have the threaded collar connecting the tank to the filler neck? If so there is a large lead washer which goes on the threaded collar and on tightening the collar it seals with the lead crushing / sealing. Lead Washer only good for one application, If tank is removed after a new lead washer is required.

Re: Sealing filler neck at gas tank
 

If it does have a crush washer, a coat of Permatex won't hurt.

Re: Sealing filler neck at gas tank
 

I coat the washer with gas tank liner material. G.M.