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07-25-2012, 11:11 PM | #1 |
Senior Member
Join Date: Jan 2012
Location: Estevan, Saskatchewan
Posts: 1,025
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rubber vs steel fuel lines
im putting a new fuel tank and sending unit in my truck and will be replacing the fuel lines, my question is should i run rubber fuel lines from the sending unit to the fuel pump? or should i reuse the hard liines and replace the rubber sections
my set up has rubber fuel lines then it goes to hard lines then back to rubber then back to hard line the back to rubber to the fuel pump lol just wondering if the hard lines are needed is all |
07-25-2012, 11:47 PM | #2 |
Registered User
Join Date: Feb 2012
Location: Austin, Arkansas
Posts: 248
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Re: rubber vs steel fuel lines
With today's fuel,rubber(neoprene) lines degrade inside,very quickly. The new fuel lines are neoprene outside,but have a plastic lining inside,that is not affected by the ethanol/additives in the fuel.
If you use the new line,as I have,it should be OK. However,as a precaution,use quality clamps,and fittings,and put loop-clamps about every 3 ft.,on long runs,to prevent sagging. Also,make sure they are protected from heat sources. I run steel line up to the carb,on the engine,but all the rest is the new type neoprene line.
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Always expect the unexpected,....but don't expect the unexpected to be the unexpected you expect ! I'm busier than a one-legged cat,in a sandbox! Veteran..and proud ! I can't fix what ain't broke....you want I should break it? |
07-25-2012, 11:53 PM | #3 |
Senior Member
Join Date: Jan 2012
Location: Estevan, Saskatchewan
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Re: rubber vs steel fuel lines
i think im just going to kee my hard lines and replace all the old rubber line
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07-26-2012, 12:51 AM | #4 |
78 Big10 454
Join Date: Jul 2008
Location: Pismo Beach, CA
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Re: rubber vs steel fuel lines
^ That has my vote.
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07-26-2012, 10:02 AM | #5 | |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: rubber vs steel fuel lines
Quote:
i use injection clamps- new 30+ years old -old
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07-26-2012, 12:06 PM | #6 |
Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: rubber vs steel fuel lines
Keep all the steel lines where the factory intended them to be. There is no reason to replace them unless you need a larger size feed line.
If you have a kink or a questionable looking metal line, replace it with another metal line. The short rubber section you speak of are there obviously where the metal lines make a jump from the frame to a component, so the rubber is there to compensate for the flex. Just for the record, if you like taking the vehicle to the track, NHRA and most other sanctioning bodies don't allow more than 12" of rubber lines in the entire fuel system (for good reason). If you must replace the whole system and don't want to fool with bending and flaring steel lines, I'd recommend going with a braided flex line. Some very high quality stuff out there now from Russel and others that is very easy to work with and has more of a nylon braid. But using this stuff including all the fittings you'll need could run you more than $300 to plumb a simple fuel line front to back. If you have return lines to plumb the price goes up more obviously. |
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