Hi ! My older brother has a '91.5 w250. Well he found out this week that the fuel lines coming from the tank are rusted pretty bad. From what he told me he's gunna need new lines the length of the truck.

Does anyone know of someone who sells aftermarket, used, or new fuel lines ?

 

I got a coil of 3/8" seamless stainless tubing off eBay and made my own. It's not too difficult to run a new fuel line. Just use any tubing that will not degrade with diesel (plain rubber fuel line for gassers is a no-no) that is at least 3/8" for the supply and 1/4" for the return. Tie it down to the frame with zip ties in a few places so it doesn't fall off or get fancy with real screw-on connector brackets. You may not even need to modify the connections at either end on the tank and pump, depending on what they are. Mine were just clamp-on and only needed a new hose barb on the pump(s).

 

The cheapest and easiest route is going to be the rubber line. But like ACE said make sure it is Diesel safe, find a local big rig shop and buy it there.

 

The original fuel-lines are 5/16-DRAW and 1/4-RETURN.

It is best to replace both with at least 3/8; 1/2 if you are gonna go crazy with power modifications.

Doing so will require that you employ some adaptations at both ends of the lines, but that is a simple task.


Most decent parts-stores will have diesel-rated rubber line; wannadiesel posted the code numbers/letters some time ago, from least desirable to best for diesel; maybe he still has that information.

I recommend you buy two different colors, one for DRAW and another for RETURN, to better keep from getting them mixed up later.


Probably the best fix would be to use stainless tubing along the frame-rails and FLARE it for 37* JIC fittings; although, there is absolutely nothing wrong with going rubber all the way; many is the truck/car that has been plumbed with plain old parts-store rubber lines.

So far, I have re-plumbed about 2/3 of the fuel system on my 3-tank truck with JIC fittings.

 

i just ordered hose from ryder fleet products along with the fleetgard bigger fuel filter. The hose i got is rated sae30r7 and on the description it says it is good for diesel fuels. for 52 cents a foot you cant go wrong

 

Thanks for the help ! He's gunna do it with rubber hoses for now.