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.

[sonny]

What part of understand don't you understand. I don't recall anybody saying to use any kind of sealant on the ferrule.

[G.M.]

There was discussion several years ago about the Ford fuel fittings supplied by Royal Brass and copper that had ferrules attached to the nut. These ferrules were hard to compress and could cause a leak if not pulled up real hard. After thinking about it I think they were made of 1/2 hard brass and should have been annealed so they would easly compress. G.M.

[sonny]

I think we are all talking about different types of applications here. Gas shut off valve (pipe thread) screwed into tank, dope optional. Gas line to said shut off valve,ferrule and nut, no dope. Air line for gauge at tank, no dope but ferrule is soldered to line. Capasci?

[joe plumber]

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 was under the impression that the fitting screws into the fuel tank ,this was based on the question being asked .

[sonny]

The shut off valve is that fitting.

[bbrocksr]

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No shutoff valve on a 40 Ford. The only pipe thread would be the drain plug.
Bill

[sonny]

My previous statement says 32BB #18

[David J]

This is the last post by the person that STARTED this thread .

Originally Posted by hope

1940 ford

[ford38v8]

Who's on first?

[sonny]

I think this subject has been played out. hopefully it helped somebody.

[jimvette59]

Guys I think he is talking about the PIPE THREADS into the tank. Use Teflon paste. Teflon paste is a lubricant and not a sealant for tightening and releasing. Wipe it clean if you are doing a 100 PT. car. Pipe threads are tapered and should seal themselves. AMEN

[Scott H]

Originally Posted by jimvette59

Guys I think he is talking about the PIPE THREADS into the tank. Use Teflon paste. Teflon paste is a lubricant and not a sealant for tightening and releasing. Wipe it clean if you are doing a 100 PT. car. Pipe threads are tapered and should seal themselves.

x2 on the pipe threads sealing themselves

[joe plumber]

I always use some type of sealer on pipe threads .Just because the threads are tapered doesn't mean they will seal themselves .Geezs ,I been doing it wrong for 43 years.Try putting water lines or gas lines together without some type of sealer and see what happens .The threads are tapered ,but they need some type of sealer .

[sonny]

I agree with Joe Plumber. just for safety sake on pipe threads I always use a little pipe dope. P.S. Did I mention I'm a retired licensed plumber.

[Gumpy]

no sealant ....i would recommend not tighting it too tight or cranking it down if your ferrel is brass with i think it is...good luck

[hope]

WOW i really opened-up a "can-of-worms".

[sonny]

Hope, not a problem. Just remember pipe thread is the only fitting that you would use dope on, and that's optional.

[Bruce Lancaster]

But there still aren't any pipe threads involving stock fuel line...connections are all compression ferrules with straight-threaded "Ford nuts"...

[sonny]

Ho Hum.

[Old Henry]

Originally Posted by hope

WOW i really opened-up a "can-of-worms".

Or, was that a can of "pipe dopes?"

[bbrocksr]

Originally Posted by jimvette59

Guys I think he is talking about the PIPE THREADS into the tank. Use Teflon paste. Teflon paste is a lubricant and not a sealant for tightening and releasing. Wipe it clean if you are doing a 100 PT. car. Pipe threads are tapered and should seal themselves. AMEN

If this is a stock 40 Ford gas tank the only pipe threads on this tank are the drain plug threads.
The filler pipe is not a pipe thread. The fuel line is not a pipe thread. It is sealed with a compression ferrule.
So the only place to use sealer is on the drain plug.
Bill

[Kube]

Originally Posted by ford38v8

Who's on first?

Alan, this would be even funnier if it were not (sadly) so true.

[Ed Pitts]

Who's on first?
Here is the answer. Ed

https://www.youtube.com/watch?v=sShMA85pv8M

[David J]

D'ya suppose the MESS above could have been avoided by simply asking " should I use some type of sealant on the drain plug threads on my 40 Ford gas tank " ? Most folks would not refer to the drain plug as a "fitting that goes to into the gas tank" . The one clear bit of info from the poster of this thread simply states "40 ford" & it was correctly pointed out that a 40 ford only has a plug - NOT a "fitting" or a "shutoff valve" . The thread was-is not about 32 trucks . If you wanna be the top bananna start your own thread . Also snipping at Bruce Lancaster falls into the bad idea category with me as he is probably one of the most knowledgeable contributers here . HEY RYAN !!!!! I would cast a vote to get rid of this mess of a thread .

[Bruce Lancaster]

Drain plug and not the fuel line?? THAT was a touch unclear! He's in luck, though, as 99% of the things won't come out without using nuclear weapons...he's miles ahead if he needs info on putting it back in!

[silvertop]

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Well--- Looks like the fight is over, Bruce just scored the knock-out punch, so I'm gona turn on the ball game.

[sonny]

Last time for me. Pipe dope on pipe threads (optional). No dope on any other fuel line fittings, no matter what kind of vehicle. Compression or even flare seal at the compression or the flare, not the threads. How did this get so far?

[Bruce Lancaster]

Damn right! I wish someone had put pipe dope on all of my Ford drainplugs 80 years ago.
The progress towards the actual question reminds me of the threads that start something like "I have a flathead. How do I fix the carburetor?" AAAAAAH!
How many electrons have died in vain!

[joe plumber]

Originally Posted by sonny

I agree with Joe Plumber. just for safety sake on pipe threads I always use a little pipe dope. P.S. Did I mention I'm a retired licensed plumber.

Right on Sonny .I'm a licensed Master Plumber and a licensed Master Mechanical Gas Fitter and still working .

[Kube]

Originally Posted by Bruce Lancaster

Damn right! I wish someone had put pipe dope on all of my Ford drainplugs 80 years ago.
The progress towards the actual question reminds me of the threads that start something like "I have a flathead. How do I fix the carburetor?" AAAAAAH!
How many electrons have died in vain!

Bruce, Not only are you one of the most knowledgeable fellows out there and seemingly always willing to help, you have a refreshing sense of humor!

[BrianCT]

Well I just read through this for the first time today because I couldn't see how such a simple question could go on for three pages. I thought maybe the subject had changed to the meaning of life. LOL
Now I'm adding to it.

[Mart]

Maybe for all of us it is a lesson in how to ask a question clearly, without leaving out essential details or over embellishing the facts.
In my background (automotive engineering - development) you have to know how to clearly phrase a question.

Mart.

[hope]

Im sorry my question was so difficult, and that i'm not an engineer just an OLD MAN trying his best to put this old Ford back together, but for those that asked ; it does say at the subject matter that it is for a" fuel line" i'll admit i did forget to say it was for a 1940 Ford.

[hope]

While i'm being "Lambasted" i might as well ask another dumb question. Does anyone know what the purpose of the spring on the installation of the fuel tank, ""ON A 1940 FORD""

[Mart]

Sorry, Hope, I was not criticising you. You did exactly the right thing. You asked a question and got the answer.

Hope the rest of the re-build goes well.

Mart.

[Mart]

Ok here's my take on the spring. It is to allow some frame flex (lots of un-paved roads back in the day) without transmitting that flex through to the tank. Radiators are mounted with a spring for the same reason.

Mart.

[hope]

Thank you

[joe plumber]

Originally Posted by hope

Im sorry my question was so difficult, and that i'm not an engineer just an OLD MAN trying his best to put this old Ford back together, but for those that asked ; it does say at the subject matter that it is for a" fuel line" i'll admit i did forget to say it was for a 1940 Ford.

Don't be sorry Hope ,you just asked a simple question and got a few different answers .Happens quite often .Take it with a grain of salt .Sorry I don't know the answer to your last question about the spring .I'm sure someone knows it and will answer it for you .Hang loose

[joe plumber]

I see you got the answer .

[hope]

isn't funny how a simple question can be turned around so much, to make it sound stupid by some a....

[David J]

Hope , I would imagine I'm in the running for the "some a...." award in your eyes so I would like to clarify a couple points . First - incomplete-hard to understand questions turn up often enough that it shouldn't turn into this . You did nothing wrong . Not giving a clear description of what your asking about has been done before by many others { yes me also} & will continue to happen I'm sure . Second - Mart hit it smack on the head about LEARNING from this on the answer end & I also agree about the spring-pad gas tank mount to allow some flexing movement . Nothing personal Hope & enjoy your 40 . David J

Originally Posted by hope

isn't funny how a simple question can be turned around so much, to make it sound stupid by some a....

[G.M.]

Mart you got it on the gas tank mounting spring. These frames twist and bend a lot. If you jack up a convertible or put it on a lift that picks the car up by frame pads you can't open or close the doors. If the tank was bolted solid to the frame the bolt holes would tear out or the tank would crack. The radiator is even more tender having soft metal and soldered parts. G.M.

[Old Henry]

Originally Posted by David J

D'ya suppose the MESS above could have been avoided by simply asking " should I use some type of sealant on the drain plug threads on my 40 Ford gas tank " ? Most folks would not refer to the drain plug as a "fitting that goes to into the gas tank" . The one clear bit of info from the poster of this thread simply states "40 ford" & it was correctly pointed out that a 40 ford only has a plug - NOT a "fitting" or a "shutoff valve" . The thread was-is not about 32 trucks . If you wanna be the top bananna start your own thread . Also snipping at Bruce Lancaster falls into the bad idea category with me as he is probably one of the most knowledgeable contributers here . HEY RYAN !!!!! I would cast a vote to get rid of this mess of a thread .

Awe lighten up. This is not a "MESS." Even though I have no interest in nor knowledge of the original question I have been well entertained by this whole discussion. It is very typical textbook comedy for various people to be discussing a topic that is totally different in each person's mind even though they all think they're talking about the same thing. It is what comedy is made of. That's exactly what the whole "Who's on First" by Abbot and Costello was all about (as suggested by Ford38v8 #29). I think we all take ourselves and life (and this forum and this thread) too seriously at times and need to find the humor in unforseen events and misunderstandings rather than get frustrated and even angry about them.

HEY RYAN!!! Leave it.

[Dave Mc]

I'm not sure if I understand everything I know about that

[hope]

"FUEL THE FIRE" will ya OLD HENRY, O.K. more. more.

[Old Henry]

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Originally Posted by hope

"FUEL THE FIRE" will ya OLD HENRY, O.K. more. more.

Ah'm doin' ma best.
Is there a preferrable "fuel line fitting" to use for "fueling the fire?"
And, does anyone have any opinions about any kind of sealant to use on such fitting?

(I love this thread.)

[hope]

Lol

[Mart]

Originally Posted by Old Henry

(I love this thread.)

Yeah, but what SEALANT have ya got on that thread?

[Old Henry]

Originally Posted by Mart

Yeah, but what SEALANT have ya got on that thread?

Pipe dopes! (Get it?)
(See #40)

(Keep it commin')

[FlatheadTed]

Yeah I fitted the tank in mine on uneven ground ,My brother in law was following me when I did a right turn the inside wheel lifted of the ground ,when I went to town the only way i could get the door open to get the Misses out was run one wheel up on the curb .LOL

Originally Posted by G.M.

Mart you got it on the gas tank mounting spring. These frames twist and bend a lot. If you jack up a convertible or put it on a lift that picks the car up by frame pads you can't open or close the doors. If the tank was bolted solid to the frame the bolt holes would tear out or the tank would crack. The radiator is even more tender having soft metal and soldered parts. G.M.

[sonny]

It was fitting for me to have a flare for such dopes! (kinda corny)

[Old Henry]

Originally Posted by sonny

It was fitting for me to have a flare for such dopes! (kinda corny)

Now the puns are getting reminiscent of "Laugh In" with Goldie Haun and Rowan and Martin back in the 60's. Sick. Really sick.

[hope]

Mart i dont know what sealant i got on the threads, i'm totally confused now.

[hope]

On & On it goes.........................