Fuel line splice - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-24-2007, 08:25 AM   #1
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Default Fuel line splice

shop said they wouldn't be willing to splice in a new fuel line going to my fuel filter. My old school mind says cut out a foot or two and connect the new line piece to the old one with a gas rated rubber hose and O' ring clamps. The shop guy says there is 40 lbs. pressure on the line and it would leak . Do I really have to replace the whole line from the motor to the filter? All the lines down there are rusted pretty good in that small vertical spot in front of the rear tire.
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Old 09-24-2007, 09:05 AM   #2
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You won't catch me splicing on either of my cars. I agree with your shop.
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Old 09-24-2007, 09:24 AM   #3
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It is possible to use compression fittings. I have seen that more than once as the filter area of our cars is prone to rusting lines.
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Old 09-24-2007, 09:34 AM   #4
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If anything, use HIGH pressure compression fittings. I used standard ones by accident on my '94 Century, and it blew off shortly after fixing it. Scared the crap out of me.

Also, splicing in a rubber hose is never a good idea. Overtime the rubber will crack and expand, and bust open.
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Old 09-24-2007, 09:47 AM   #5
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is there really 40 psi in that fuel line? for some reason i thought it was 15... i have the SAME problem (we found out at the MI meet). Not sure what i'm going to do about it yet though.
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Old 09-24-2007, 09:52 AM   #6
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Quote:
Originally Posted by BillBoost37
It is possible to use compression fittings. I have seen that more than once as the filter area of our cars is prone to rusting lines.
yes, my dad and i have done it on my old 88 celebrity. Worked very well. No leaks at all. i mean its the same way of doing brake lines and they dont leak
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Old 09-24-2007, 11:38 AM   #7
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Quote:
Originally Posted by Darrel
is there really 40 psi in that fuel line? for some reason i thought it was 15... i have the SAME problem (we found out at the MI meet). Not sure what i'm going to do about it yet though.
It'* typically over 50psi. The FPR drops it down to what you need from there.
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Old 09-24-2007, 11:48 AM   #8
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wow, 50 psi! makes me a little worried about all the rust on the lines then, i don't want them getting so thin they burst.
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Old 09-24-2007, 12:31 PM   #9
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i spliced a new rubber hose in to mine right under my passenger side door. I havent had any problems. But should i change the whole line? And all my fuel lines are rubber from fuel filter to the tank. I dont think it came like that.
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Old 09-24-2007, 12:35 PM   #10
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personally, the only time i would splice with a piece of rubber hose would be if it were a very temporary fix until i can get to a shop etc. but thats jmo.
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