a little fuel line help... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pcmcobra · 05-27-2007, 06:25 PM

I am having to replace the hard line from fuel pump to carb, due to new brackets...
I took off the fuel line, took it to a couple autoparts places today, trying to find the fittings I need.
My best guess is this is 3/8 fuel line, flared.
I took the line along with the original fittings, the 3/8 fittings they had would not work correctly. Took the shiny chrome 90 3/8npt to nipple out of package and checked it against a brass nut we used to gauge the old fitting on my old fuel line. No worky.
My truck is an 86/305/4bbl stock
What fittings do I need, cause I am getting too much conflicting info from the monkeys at the auto parts places around town.
I need a male to nipple 90 for fuel pump (to clear brackets) and just a straight male to nipple for carb.
We are talking about 3/8?
Shopping for fittings never gave me any problems before today, too many people gave me so many different stories, can someone just clear this up for me?
sorry for the long winded rant.
Just an fyi, I am replacing the stock hard line with some rubber hose...

bigjimzlll · 05-27-2007, 08:13 PM

probably 5/16th

cdowns · 05-27-2007, 08:23 PM

it might be 1/4NPT

by the way running a rubber fuel line is an excellent way to burn your truck to the ground

pcmcobra · 05-27-2007, 08:52 PM

checked again at another store, it is 3/8.
As for burning the truck to the ground, I did mean some braided hose, not a rubber hose...that was a brain fart. Can't make it look too ugly.(ier)
I might check out one of those summit kits...they look decent.

neonlarry · 05-27-2007, 09:48 PM

Its still rubber hose, just has a flashy cover. But its your truck, I just bend new steel lines to replace mine.

RACINJASON22 · 05-27-2007, 11:54 PM

I vote just bend a new steel one to clear everything

Ivan D. · 05-28-2007, 04:03 AM

why is rubber hose good for starting up an engine fire?

GREASEMONKEY72 · 05-28-2007, 04:14 AM

Quote:

Originally Posted by Ivan D.

why is rubber hose good for starting up an engine fire?

tearing, cracking, leaking

ive got rubber hose from the pump to the carb but i check everytime before i leave i look under the hood and look over everything

bigjimzlll · 05-28-2007, 11:33 AM

Didn't GM use rubber hose for the transition from the frame to the pump?

cableguy0 · 05-28-2007, 01:27 PM

there are places rubber hose has to be used. if you use a solid piece of steel line it will flex and bend and eventually crack due to the engine moving up and down. stock would be rubber from tank to the frame steel line down the frame then rubber from frame to pump then steel from pump to carb

neonlarry · 05-28-2007, 03:53 PM

Also if the rubber hose leaks at either of those places chances are the fuel will just spill on the ground not pool on a hot engine.

cdowns · 05-28-2007, 06:45 PM

thats why ALOT of sanctioning bodies dont allow the use of rubber fuel lines except in rare cases as transitional (very short) pieces

once or twice a year on this board theres always a BOOHOO post "my truck dun burned up"

Ivan D. · 05-28-2007, 09:42 PM

aight then, point taken, hose will get replaced with a steel line in the not too distant future

05-27-2007, 06:25 PM	#1
pcmcobra Registered User Join Date: Aug 2006 Location: Florida Posts: 1,684	a little fuel line help... I am having to replace the hard line from fuel pump to carb, due to new brackets... I took off the fuel line, took it to a couple autoparts places today, trying to find the fittings I need. My best guess is this is 3/8 fuel line, flared. I took the line along with the original fittings, the 3/8 fittings they had would not work correctly. Took the shiny chrome 90 3/8npt to nipple out of package and checked it against a brass nut we used to gauge the old fitting on my old fuel line. No worky. My truck is an 86/305/4bbl stock What fittings do I need, cause I am getting too much conflicting info from the monkeys at the auto parts places around town. I need a male to nipple 90 for fuel pump (to clear brackets) and just a straight male to nipple for carb. We are talking about 3/8? Shopping for fittings never gave me any problems before today, too many people gave me so many different stories, can someone just clear this up for me? sorry for the long winded rant. Just an fyi, I am replacing the stock hard line with some rubber hose... __________________ 1986 C10 SWB 6.0/6l90e Miami...Flee it like a native Last edited by pcmcobra; 05-27-2007 at 06:25 PM.

05-27-2007, 08:13 PM	#2
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	Re: a little fuel line help... probably 5/16th __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

05-27-2007, 08:23 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: a little fuel line help... it might be 1/4NPT by the way running a rubber fuel line is an excellent way to burn your truck to the ground __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

05-27-2007, 08:52 PM	#4
pcmcobra Registered User Join Date: Aug 2006 Location: Florida Posts: 1,684	Re: a little fuel line help... checked again at another store, it is 3/8. As for burning the truck to the ground, I did mean some braided hose, not a rubber hose...that was a brain fart. Can't make it look too ugly.(ier) I might check out one of those summit kits...they look decent. __________________ 1986 C10 SWB 6.0/6l90e Miami...Flee it like a native

05-27-2007, 09:48 PM	#5
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Re: a little fuel line help... Its still rubber hose, just has a flashy cover. But its your truck, I just bend new steel lines to replace mine. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

05-27-2007, 11:54 PM	#6
RACINJASON22 GEARHEAD Join Date: Jan 2007 Location: CENTRAL,PA Posts: 2,284	Re: a little fuel line help... I vote just bend a new steel one to clear everything __________________ 72 SWB 2WD MY PROJECT 72 LWB 4X4 FUTURE PROJECT SUBSCRIBE HEREBOARD VENDORS HERE NORWOOD MEET SURVIVOR!

05-28-2007, 04:03 AM	#7
Ivan D. glamoros piece o' lowlife Join Date: Mar 2007 Location: Redford, MI Posts: 1,164	Re: a little fuel line help... why is rubber hose good for starting up an engine fire? __________________ The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express

05-28-2007, 11:33 AM	#9
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	Re: a little fuel line help... Didn't GM use rubber hose for the transition from the frame to the pump? __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

05-28-2007, 01:27 PM	#10
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: a little fuel line help... there are places rubber hose has to be used. if you use a solid piece of steel line it will flex and bend and eventually crack due to the engine moving up and down. stock would be rubber from tank to the frame steel line down the frame then rubber from frame to pump then steel from pump to carb __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

05-28-2007, 03:53 PM	#11
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Re: a little fuel line help... Also if the rubber hose leaks at either of those places chances are the fuel will just spill on the ground not pool on a hot engine. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

05-28-2007, 06:45 PM	#12
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: a little fuel line help... thats why ALOT of sanctioning bodies dont allow the use of rubber fuel lines except in rare cases as transitional (very short) pieces once or twice a year on this board theres always a BOOHOO post "my truck dun burned up" __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

05-28-2007, 09:42 PM	#13
Ivan D. glamoros piece o' lowlife Join Date: Mar 2007 Location: Redford, MI Posts: 1,164	Re: a little fuel line help... aight then, point taken, hose will get replaced with a steel line in the not too distant future __________________ The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express



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