fuel line

[hope]

What type of sealant do i put on the threads to the fitting that goes to into the fuel thank?

Thanks

[G.M.]

NONE. The ferule on the end of the line is squeezed by the nut. That is what seals it. G.M.

[sonny]

I think he means the threads going in the tank, I just use a good pipe dope for liquid fuel.

[hope]

That is what i meant Sonny, thanks for the back up.

[richard crow]

like gm said none. the sealing takes place with the ferule. the fiting threads hold the ferule in place . same thing goes for flared lines

[joe plumber]

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I use #5 Rector Seal pipe dope .It works on just about everything except abs plastic pipe fittings .Good stuff .jmo

[G.M.]

This is not a pipe fitting, it is a nut and ferrule. You could put some pipe sealant on more as a lubricant but this type fitting is sealed by the ferrule being compressed around the tubeing and against the seat and nut. This is the same fitting as on both ends of the fuel line between the fuel pump and carb. G.M.

[bbrocksr]

The threads aren't supposed to seal.
Bill

[trevo]

If you want a worry free seal it wont hurt to apply a coating of LOCTITE 567 to all your fuel fittings and threads, tighten remove excess and allow 24 hours to dry or may be any other suitable Anerobic Sealer, works well on my vehicles.

[sonny]

G.M. and Richard crow I think you didn't understand the question. Read it again and look at some of the answers. Were not talking about the ferrule.

[G.M.]

Read my post you don't seem to understand how the fitting at the pick up tube going into the tank works. G.M.

[Kube]

Originally Posted by hope

What type of sealant do i put on the threads to the fitting that goes to into the fuel thank?

Thanks

I'm with G.M. on this one... NO sealant is necessary. If it is, then there is a problem with the fittings and / or seat in the tank boss.

[TomO]

I agree with GM and Kube. No sealant is necessary or desired. The fitting threads should be clean and the end of the fitting should tighten against the ferrule to seal the fuel. The ferrule should be soldered to the line.

[David J]

Lots of useful info here . If you are talking about a 33-34 passenger car here all you have is the plug on the bottom { pipe thread } & the pickup-sending unit & that has a gasket that takes care of that . The gas & air lines as stated above do not require any sealant . It would be helpful if you at least tell the troops what your working on .

Originally Posted by hope

What type of sealant do i put on the threads to the fitting that goes to into the fuel thank?

Thanks

[Bruce Lancaster]

Yes...there are no clues as to car under discussion. I believe answers will differ if post-1948, if early Ford I believe all use the compression ferrule and if gas gets to the threads you have a failure needing repair, not a need for goo!

[hope]

1940 ford

[Old Henry]

Originally Posted by David J

all you have is the plug on the bottom { teflon tape }

White teflon tape is for water and air line installations only. Yellow teflon tape for natural gas/propane. All teflon tape is deteriorated by gasoline and shouldn't be used for gasoline or other petroleum product fittings.

[sonny]

The one I am referring to is a 32bb tank. The shutoff valve screws into the tank ( dope is optional ). Then you install your fuel line, with ferrule and nut. No dope is necessary.

[Dave Mc]

I have used Stainless Steel pipe Sealant as it is not affected by gasoline and will keep the threads lubricated.

[jerry grayson]

Originally Posted by sonny

I think he means the threads going in the tank, I just use a good pipe dope for liquid fuel.

What part of "none" don't you understand? Any kind of sealant WILL NOT help with gas leak on these type fittings and may well make removing difficult. As mentioned by others the threads are not the sealing, the ferrule is.