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Fuel pump hoses

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

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Fuel pump hoses

Posted: 10/28/07 1:38pmMessage 1 of 7
J
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ROCK HILL, SC - USA
Joined: 8/23/2002
Posts: 17
Vette(s): 1978 Light Beige, 2000 Light Pewter Metallic convertible
I have to replace the rubber hoses from the fuel lines to the fuel pump. My fuel tank is about 1/3 full. When I disconnect the rubber hose from the fuel supply line to the pump, will the fuel run out of the tank? Or will I just get a small amount of gas that's currently in the fuel line?
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Fuel pump hoses

Posted: 10/28/07 1:53pmMessage 2 of 7
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22715
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
IF you can jack the front of the car up, you'll not have as much fuel come out. You will get some, either way. You'll also get whatever is in the pump, and the line from the pump to the carb. Just get a large drain pan, or some other like container to catch as much as you can, while you swap the hoses.

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Fuel pump hoses

Posted: 10/28/07 3:09pmMessage 3 of 7
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Moses Lake, WA - USA
Joined: 4/16/2005
Posts: 2134
Vette(s): 1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II
A trick I used along with Joel's advice was to leave the old hoses attached to the steel fuel lines and use vice grips to pinch the hoses closed. Then remove the hoses from the fuel pump and install the new ones. Then one at a time quickly remove the hose from the steel tube and stick the new one on. You don't end up with as much fuel running out.
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Fuel pump hoses

Posted: 10/28/07 5:27pmMessage 4 of 7
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
I you have mild compressed air, take the cap off of the tank, disconnect the fuel line, and give a gentle shove of air back through the line. 
 
The line ends up empty, and it won't siphon.   Just be gentle with the air and be sure to take the cap off first.
 
If you don't take the cap off, you will pressurize the tank, and fuel will shoot out in huge volume.
 
It works well.
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Fuel pump hoses

Posted: 10/28/07 5:29pmMessage 5 of 7
e
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Lanoka Harbor, NJ - USA
Joined: 12/21/2006
Posts: 2191
Vette(s): 1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c
when i did the 75 i found that taking the new hose and sticking the end of a drill bit to plug it and doing the line coming from the tank first and then connecting the fuel pump, i got less gas all over. when i first got the car had to cut the line a little on fuel pump side (before i got the new ones) and was a mess with all the gas. did hook up the vice grips to the old hose though and that helped to as was said.
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Fuel pump hoses

Posted: 10/28/07 5:40pmMessage 6 of 7
J
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ROCK HILL, SC - USA
Joined: 8/23/2002
Posts: 17
Vette(s): 1978 Light Beige, 2000 Light Pewter Metallic convertible
How about if I just disconnect the fuel line at the tank. It looks like it is accessible through the fuel filler opening. Won't that solve the problem?
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Fuel pump hoses

Posted: 10/28/07 7:19pmMessage 7 of 7
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
You do need to be gentle when pinching the lines with vice grips.  It's easy to damage the lines and create future leaks.     Done with care, there is no problem.
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