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Russell · 04-27-2004, 04:02 PM

Hey all

I accidentally twisted my old fuel line on the truck and was forced to install a new one, unfortunately, to get it to fit, I have to loosen the fitting that goes into the bottom of the fuel pump, which caused it to leak something nasty. I got it tightend up, and put teflon tape on all the fittings. It doesn't drip anymore, but it is still always moist with gas underneith (leaking a little bit, but not too much at all) It doesn't matter if I rev the engine up to 5000 rpm, it doesn't spray out. Is this dangerous to run like this? I'm gonna go to Napa tonight to get some new intake gaskets and valve cover gaskets, should I get a new non-metal fuel line that runs from the pump to the carb?

ocbaud · 04-27-2004, 04:11 PM

sorry for the hijack.. but...

should i put some teflon tape on teh threads of my AN fittings?

i got a 3/8" to -06AN fitting for the fuel pump and am wondering about that.

NeCrOmAnCeR · 04-28-2004, 01:14 PM

As I was told in the Marine Corps. ANY leak concerning fuel is a bad thing. If it is enough to cause a part to be damp, vapors are also around. Vapors = BOOOMMM!!! Replace any part which is causing your problems.
ocbaud - some sealant/lubricant should be used on any pipe thread, such as the nipple which screws into the fuel pump body. The connections which use compression (the ones with 37 degree angle sealing surfaces) should NEVER have tape put on them. If you look for instalation instructions for the fittings you will find clarification on this.

Low87 · 04-28-2004, 02:18 PM

I've always been told not to use any teflon tape for fuel fittings. I don't, and I've never had any leak...

Opper77 · 04-28-2004, 06:17 PM

AN type fittings are compression style...aka no tape

Russell · 04-28-2004, 08:36 PM

I just got a new fuel pump from the wreckers along with a nice HD hitch (good for 12 000 lbs) for 20 bucks, woohoo

NeCrOmAnCeR · 04-28-2004, 09:34 PM

Here is a link from rusell pperformance. Pipe fittings get tape, and the compression fittings don't. Hope this helps clarify what I said earlier.

ocbaud was asking about a 3/8 X -6 AN fitting which screws into the fuel pump then to a hose.

http://www.russellperformance.com/te...r_fittings.htm

KShortell · 04-29-2004, 10:02 AM

Check the flare on the fuel line. It should be a double-flare and seal with no leaks. I just had to fabricate a new fuel line for my GM 3.0L in the boat. No leaks! Leaks are especially dangerous in a boat.
Fuel Leaks in the Bilge = Explosion

Of course, you'll always get the rare morons like the guy in Florida who pumped the hull full of gas through the rod holder a couple of weeks ago. Hit the starter and BOOM!

Again, check the flare and the seat in the female brass fitting. Teflon tape isn't necessary since it's the flare and seat, not the threads, that provide the sealing surfaces. Good luck!

Russell · 04-29-2004, 02:31 PM

Well, the new fuel pump works real good! But that hitch reciever I bought doesn't fit

Guess I gotta take it back and look for a new one that is off an actual pickup.

04-27-2004, 04:02 PM	#1
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Gas lines Hey all I accidentally twisted my old fuel line on the truck and was forced to install a new one, unfortunately, to get it to fit, I have to loosen the fitting that goes into the bottom of the fuel pump, which caused it to leak something nasty. I got it tightend up, and put teflon tape on all the fittings. It doesn't drip anymore, but it is still always moist with gas underneith (leaking a little bit, but not too much at all) It doesn't matter if I rev the engine up to 5000 rpm, it doesn't spray out. Is this dangerous to run like this? I'm gonna go to Napa tonight to get some new intake gaskets and valve cover gaskets, should I get a new non-metal fuel line that runs from the pump to the carb? __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

04-28-2004, 01:14 PM	#3
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	As I was told in the Marine Corps. ANY leak concerning fuel is a bad thing. If it is enough to cause a part to be damp, vapors are also around. Vapors = BOOOMMM!!! Replace any part which is causing your problems. ocbaud - some sealant/lubricant should be used on any pipe thread, such as the nipple which screws into the fuel pump body. The connections which use compression (the ones with 37 degree angle sealing surfaces) should NEVER have tape put on them. If you look for instalation instructions for the fittings you will find clarification on this. Last edited by NeCrOmAnCeR; 04-28-2004 at 01:17 PM.

04-28-2004, 02:18 PM	#4
Low87 been here longer than Liz Join Date: Feb 2000 Location: Broken Arrow, OK Posts: 2,437	I've always been told not to use any teflon tape for fuel fittings. I don't, and I've never had any leak... __________________ ~Greg~ Mac's Garage '87 SWB 6/8 drop "Piso" '08 CCSB Silverado DD the departed '89 GMC K5 Jimmy 4x4 "Rusty Nuts" '77 Chevy K5 Blazer 2wd '83 Chevy stepside "You get what you pay for" - Mike 'swervin ervin' Ervin

04-28-2004, 06:17 PM	#5
Opper77 Ob-Gyn Kenobi Join Date: Aug 2003 Location: Edmonton, Alberta Posts: 489	AN type fittings are compression style...aka no tape __________________ '85 GMC Shortbox... I used to have a firm handle on life....then it broke off.

04-28-2004, 08:36 PM	#6
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	I just got a new fuel pump from the wreckers along with a nice HD hitch (good for 12 000 lbs) for 20 bucks, woohoo __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

04-27-2004, 04:11 PM	#2
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	sorry for the hijack.. but... should i put some teflon tape on teh threads of my AN fittings? i got a 3/8" to -06AN fitting for the fuel pump and am wondering about that.

04-28-2004, 09:34 PM	#7
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	Here is a link from rusell pperformance. Pipe fittings get tape, and the compression fittings don't. Hope this helps clarify what I said earlier. ocbaud was asking about a 3/8 X -6 AN fitting which screws into the fuel pump then to a hose. http://www.russellperformance.com/te...r_fittings.htm Last edited by NeCrOmAnCeR; 04-28-2004 at 09:37 PM.

04-29-2004, 10:02 AM	#8
KShortell Registered User Join Date: Oct 2003 Location: Chesapeake, VA Posts: 728	Check the flare on the fuel line. It should be a double-flare and seal with no leaks. I just had to fabricate a new fuel line for my GM 3.0L in the boat. No leaks! Leaks are especially dangerous in a boat. Fuel Leaks in the Bilge = Explosion Of course, you'll always get the rare morons like the guy in Florida who pumped the hull full of gas through the rod holder a couple of weeks ago. Hit the starter and BOOM! Again, check the flare and the seat in the female brass fitting. Teflon tape isn't necessary since it's the flare and seat, not the threads, that provide the sealing surfaces. Good luck! __________________ Semper Paratus

04-29-2004, 02:31 PM	#9
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Well, the new fuel pump works real good! But that hitch reciever I bought doesn't fit Guess I gotta take it back and look for a new one that is off an actual pickup. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)



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