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Do you seal, or put teflon tape on your fuel pump fittings?
#1944951
11/04/15 12:07 PM
11/04/15 12:07 PM
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Joined: Jan 2003
Posts: 7,538
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: 7,538
Albany, NY
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Guys, Gals,
I get a persistent little drip of fuel from the brass nipple that screws into the fuel pump housing. I've tightened it, and it seems better, but still a bit of moist fuel comes past the threads.
Do I keep tightening the brass fitting, or do you guys use that plumber's teflon tape or some kind of sealant at these fittings?
I believe I have a small jar of white goop sealant from NAPA that is fuel resistant.
Thanks,
- 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]
#1944959
11/04/15 12:22 PM
11/04/15 12:22 PM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: roadhazard]
#1944982
11/04/15 01:13 PM
11/04/15 01:13 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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What Roadhazard said, take the fitting off & inspect the cone interface on both sides which is where it seals. reflare it slightly then use some sealant on the threads to take care of any minor seepage from a less than perfect union but considering that it might get worse on down the line plus the severity of a fuel leak, I would likely cut/reflare the line and or get a new fitting especially if it was on the pressure side going to the carb
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]
#1945007
11/04/15 02:21 PM
11/04/15 02:21 PM
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Joined: Oct 2006
Posts: 7,367
Iowa
burdar
Owen's Dad
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Owen's Dad
Joined: Oct 2006
Posts: 7,367
Iowa
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I get a persistent little drip of fuel from the brass nipple that screws into the fuel pump housing. It seems like he's saying the fitting is leaking at the fuel pump....not the line/fitting connection. Isn't the fuel pump pipe thread? Pipe thread should seal itself shouldn't it? I wonder if the fitting has a small crack in it?
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: 67SATisfaction]
#1945009
11/04/15 02:22 PM
11/04/15 02:22 PM
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Joined: Jan 2003
Posts: 15,357
Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,357
Omaha Ne
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First thing to establish is are you dealing with pipe threads or an inverted flare fitting. Pipe threads require sealant, several options are available. Inverted flare fittings do not require sealant. 
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: TJP]
#1945051
11/04/15 03:52 PM
11/04/15 03:52 PM
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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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First thing to establish is are you dealing with pipe threads or an inverted flare fitting. Pipe threads require sealant, several options are available. Inverted flare fittings do not require sealant. This^^^^^ And use pipe dope on tapered pipe threads around fuel systems, not tape. Because tape will wick fuel(turns yellow) and is hell if you ever remove the fitting because little pieces of teflon tape will be everywhere and hard to keep out of your fuel system. And if you apply the tape wrong to begin with you will have tape in your fuel system from the get go. Avoid teflon tape around fuel systems is my advise.
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: burdar]
#1945053
11/04/15 03:54 PM
11/04/15 03:54 PM
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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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I get a persistent little drip of fuel from the brass nipple that screws into the fuel pump housing. It seems like he's saying the fitting is leaking at the fuel pump....not the line/fitting connection. Isn't the fuel pump pipe thread? Pipe thread should seal itself shouldn't it? I wonder if the fitting has a small crack in it? Nope pipe fittings need a thread sealer, even brass fittings do.
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: Challenger 1]
#1945081
11/04/15 04:58 PM
11/04/15 04:58 PM
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Joined: Jan 2008
Posts: 2,592
None
71rm23
master
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master
Joined: Jan 2008
Posts: 2,592
None
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I get a persistent little drip of fuel from the brass nipple that screws into the fuel pump housing. It seems like he's saying the fitting is leaking at the fuel pump....not the line/fitting connection. Isn't the fuel pump pipe thread? Pipe thread should seal itself shouldn't it? I wonder if the fitting has a small crack in it? Nope pipe fittings need a thread sealer, even brass fittings do. I agree!
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: 67SATisfaction]
#1945152
11/04/15 06:39 PM
11/04/15 06:39 PM
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Joined: Jan 2003
Posts: 13,585
md
mopars4ever
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,585
md
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Re: Do you seal, or put teflon tape on your fuel pump fittings?
[Re: burdar]
#1945285
11/04/15 10:31 PM
11/04/15 10:31 PM
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Joined: Jan 2003
Posts: 7,538
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: 7,538
Albany, NY
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Thanks for your responses - I get a persistent little drip of fuel from the brass nipple that screws into the fuel pump housing. It seems like he's saying the fitting is leaking at the fuel pump....not the line/fitting connection. Isn't the fuel pump pipe thread? Pipe thread should seal itself shouldn't it? I wonder if the fitting has a small crack in it? Yes. It's the brass fitting here:  The leak appears to be getting past the brass nipple's threads where it screws into the metal housing of the fuel pump. But Thanks for your responses - What I take away here is I can safely try using some standard parts-store sealant to try and stop this. NOT teflon tape. I'll be wearing a new cologne tonight! - Art
Last edited by 67SATisfaction; 11/04/15 10:34 PM.
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: screamindriver]
#1945395
11/05/15 12:38 AM
11/05/15 12:38 AM
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Joined: May 2012
Posts: 1,821
South Bend
John Brown
top fuel
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top fuel
Joined: May 2012
Posts: 1,821
South Bend
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I've always used permatex #2 on any threads that needed sealing...  Yep, even had to use it on the cheap imported water pipes when I replumbed my water heater.
July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.
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