The "EFI rated" fuel hose at Napa is $2 a foot and is Viton. It isn't black, it is almost a really dark green color.No one really has long term info but besides the viton stuff SAE 30R9 is rated for alternative fuels. I got some at NAPA but they only come in 10ft lengths and is $7 a foot!
No, of course not. The return works the hardest at idle since the engine isn't using much fuel to run (returns most to the tank)The factory return line on jeep is smaller than the supply line. would that cause any loss of power.
When I said 5/16 return is because the fuel tank that use a return have 5/16 not the 3/16.Can be done both way's .The bigger fuel isn't going to hurt anything .First off, the factory first gen dodges have just 5/16" plastic supply lines and run fine. No restriction. I doubt your jeep fuel lines are a restriction!!! All of our 6BT 5.9 liter and 6CT Cummins 8.3 liter equipment at work is 3/8" supply....nothing is larger. They make rated power all day long.
I can't see one reason at all for going over 5/16" or 3/8" unless you live in Alaska and need to move gelled fuel through the lines.
Return is same size and the line coming off of the engine: 3/16"
The "EFI rated" fuel hose at Napa is $2 a foot and is Viton. It isn't black, it is almost a really dark green color.
Not sure about the min temp, but on a TV programme called Ice road truckers they use nylon line for the air brakes so it must be able to cope with the low temps. If you have done any household plumbing with copper pipes and compression fittings its virtually the same. You can get inserts to put in the end of the pipe so that it doesn't crush but these aren't compulsory if you don't overtighten. When I drove my first diesel I thought thats it no more petrol engines for me, well when I put nylon fuel lines on I had the same eureka moment and thought why doesn't everybody use nylon. Still not everyone is convinced about diesels. Some people stick with what they know.The nylon line sounds good. Do you know what temps this stuff works at? I'm not as concerned with heat as I am with cold. It gets to -30 on a regular basis in the winter, and can be colder than that. I've had to replace factory plastic lines on several vehicles because they got brittle and cracked in the cold. We ended up running coated metal line where possible, and high PSI rated hose where necessary for flexibility. Also, do you have any pictures, or other details to help me get the right stuff? We have a couple hardware stores in town, but nobody knows anything about diesels. I asked the local part's stores about diesel rated fuel line, and they looked at me funny and offered me standard fuel line, with no knowledge whether it was diesel rated.
Well, just because someone else got lucky with the right stuff 15 years ago doesn't mean it'll work with what is coming out of the fuel pumps today. There is tons of info in this thread already, what more could you possibly want to know? The list of compatible and non-compatible is on the first page.Could you please enlighten me about special "diesel-rated" fuel line?