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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: jb500]
#1945440
11/05/15 01:46 AM
11/05/15 01:46 AM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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not enough exp (here) to say yay or nay on the white tape (I've used it "some") but (1) wrap it tight (2) go around in the correct direction (so it dont want to unwind when screwing the fittings together (3) work the tape with your thumb/forefinger deep into the root
live every 24 hour block of time like it's your last day on earth
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: 67SATisfaction]
#1947655
11/08/15 07:34 PM
11/08/15 07:34 PM
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Joined: Jan 2003
Posts: 7,541
Albany, NY
67SATisfaction
OP
The member whose name is actually Art
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OP
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,541
Albany, NY
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  Thanks all - my garage is now free of lingering gasoline odors and my young kids won't grow up with defects. I had a small jar of teflon paste from NAPA. I pinched the supply-side fuel hose with a pair of vice grips wrapped in electrical tape to prevent marring. I backed each brass fitting off to expose a lot of the thread without unleashing a torrent of fuel. Applied the white teflon goop, then tightened them back down. Seems to be sealed now. Cheers, - Art
65 Satellite hardtop 361/4bbl console 727 2.76
67 Satellite convert 383/2bbl column 727 3.23
67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd
67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd
71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd
82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle
75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF
77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF
07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: 67SATisfaction]
#1947677
11/08/15 08:18 PM
11/08/15 08:18 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Thanks all - my garage is now free of lingering gasoline odors and my young kids won't grow up with defects. Seems to be sealed now. Cheers, - Art Art that was too easy
live every 24 hour block of time like it's your last day on earth
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: pro451bee]
#1947961
11/09/15 10:08 AM
11/09/15 10:08 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Brass to aluminum should not need any sealer , they are both soft metals used as gaskets , I always use steel wool on threads and a little oil or grease , then run it in and back out and in couple times . I disagree, I'm in the LP gas business since 1983 and have installed several thousand LP installations since. It's all aluminum regulators and brass fittings. I guarantee you it will leak without sealant. I don't care how much lube you use and how tight you get them, THEY NEED SEALANT I'm here to say. Most of the pressures I'm dealing with is 10 PSI and 11" water column(1/2psi), so not much pressure except for the tank pressure, 50-125psi. So same as a carb fuel system for the most part. If you try to tighten them that tight, Art would would crack his fuel pump housing and it's 3/8" not 1/4". It's BS saying soft metals pipe threads don't need sealant because they do! Why not use sealant?
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: jb500]
#1947963
11/09/15 10:21 AM
11/09/15 10:21 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Again, tape does not seal. It only is only a lubricant. It is a metal to metal seal. Any added substance, pipe dope, PTFE paste, and Loctite put on the threads only provide a slippery surface to allow the threads to be torqued to seal. NPT stuff is not the best option for items that will be taken apart often. The threads are deformed each time the fitting is tightened up. That is where the JIC 37deg fitting shines.
The pics show my setup and it has not been apart since I cobbled it together, and it has not leaked one drop in several years.
Go your own way on what you put on the threads....just put something on them to help lube them up.
I also should specify that the thread type on most if not all hyd fittings and the aftermarket variant is NPTF. NPTF is designed to provide a more leak-free seal without the use of teflon tape or other sealant compound. NPTF threads are the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path.
NPT threads in the pipe/steam fitting world require some sort of sealant.
The hydraulic fittings you got there works obviously, but are not idea. They are heavy steel made for hi pressures and low volume with nasty 90° corners in them. They are not for fuel systems and neither is teflon tape. If you made big power and got into tire shake those heavy steel fittings could crack the aluminum fittings. The teflon tape is a problem when you take it apart, almost impossible to get all the small pieces of tape out of the interior of the fittings and a big PIA. Plus show us a picture of your rig after a few years use, not when it's new. All the white tape turns yellow...why do you think that happens?
Last edited by Challenger 1; 11/10/15 09:00 PM.
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: jb500]
#1948366
11/09/15 09:43 PM
11/09/15 09:43 PM
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Joined: Apr 2006
Posts: 1,497
North East USA
BIGGERED
Reasonable Title
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Reasonable Title
Joined: Apr 2006
Posts: 1,497
North East USA
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Again, tape does not seal. It only is only a lubricant. It is a metal to metal seal. Any added substance, pipe dope, PTFE paste, and Loctite put on the threads only provide a slippery surface to allow the threads to be torqued to seal. NPT stuff is not the best option for items that will be taken apart often. The threads are deformed each time the fitting is tightened up. That is where the JIC 37deg fitting shines.
The pics show my setup and it has not been apart since I cobbled it together, and it has not leaked one drop in several years.
Go your own way on what you put on the threads....just put something on them to help lube them up.
I also should specify that the thread type on most if not all hyd fittings and the aftermarket variant is NPTF. NPTF is designed to provide a more leak-free seal without the use of teflon tape or other sealant compound. NPTF threads are the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path.
NPT threads in the pipe/steam fitting world require some sort of sealant.
The certified hose and fitting guy made a number of errors in the way he plumbed his system. I am sure it works and does not leak but there are a number of issues with how this is plumbed. Thank you Red (the previously certified certifiable hydraulic plumbing guy)
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: BIGGERED]
#1948646
11/10/15 11:11 AM
11/10/15 11:11 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Again, tape does not seal. It only is only a lubricant. It is a metal to metal seal. Any added substance, pipe dope, PTFE paste, and Loctite put on the threads only provide a slippery surface to allow the threads to be torqued to seal. NPT stuff is not the best option for items that will be taken apart often. The threads are deformed each time the fitting is tightened up. That is where the JIC 37deg fitting shines.
The pics show my setup and it has not been apart since I cobbled it together, and it has not leaked one drop in several years.
Go your own way on what you put on the threads....just put something on them to help lube them up.
I also should specify that the thread type on most if not all hyd fittings and the aftermarket variant is NPTF. NPTF is designed to provide a more leak-free seal without the use of teflon tape or other sealant compound. NPTF threads are the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path.
NPT threads in the pipe/steam fitting world require some sort of sealant.
The certified hose and fitting guy made a number of errors in the way he plumbed his system. I am sure it works and does not leak but there are a number of issues with how this is plumbed. Thank you Red (the previously certified certifiable hydraulic plumbing guy) Yup. A few people may want to take a look at this holly installation sheet. Link
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: Challenger 1]
#1950246
11/13/15 12:08 AM
11/13/15 12:08 AM
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Joined: Jul 2007
Posts: 199
TN Hoosier
jb500
member
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member
Joined: Jul 2007
Posts: 199
TN Hoosier
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Again, tape does not seal. It only is only a lubricant. It is a metal to metal seal. Any added substance, pipe dope, PTFE paste, and Loctite put on the threads only provide a slippery surface to allow the threads to be torqued to seal. NPT stuff is not the best option for items that will be taken apart often. The threads are deformed each time the fitting is tightened up. That is where the JIC 37deg fitting shines.
The pics show my setup and it has not been apart since I cobbled it together, and it has not leaked one drop in several years.
Go your own way on what you put on the threads....just put something on them to help lube them up.
I also should specify that the thread type on most if not all hyd fittings and the aftermarket variant is NPTF. NPTF is designed to provide a more leak-free seal without the use of teflon tape or other sealant compound. NPTF threads are the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path.
NPT threads in the pipe/steam fitting world require some sort of sealant.
The hydraulic fittings you got there works obviously, but are not idea. They are heavy steel made for hi pressures and low volume with nasty 90° corners in them. They are not for fuel systems and neither is teflon tape. If you made big power and got into tire shake those heavy steel fittings could crack the aluminum fittings. The teflon tape is a problem when you take it apart, almost impossible to get all the small pieces of tape out of the interior of the fittings and a big PIA. Plus show us a picture of your rig after a few years use, not when it's new. All the white tape turns yellow...why do you think that happens? What is your defintion of a few years??? What you are looking at is going on 6 years now. No issues with leaks and not been apart since it was assembled. Notice, the tape is not yellowed at all. Also, bogus statement about hyd fittings being only high pressure and low volume. Please provide the evidence supporting otherwise. Steel fittings are the same as the $$$ AL variants. Exception being the smooth tube bend fittings. Those are a better flowing fitting, but not needed here. Your natural gas installs most likely are not using NPTF threads and therefore, require a thread sealant. NGT is not NPTF. Lastly, what glaring errors are you identifying in my set up? Curious on what you both think is wrong.
Last edited by jb500; 11/13/15 01:08 AM.
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Now, onto rocket designing and building 
