fuel injection hose?

[shegel]

im having a hard time finding viton fuel line for my biodiesel. conversion. i seem to remember somting about fuel injection line being able to hold up to it. also what is it about bd that causes regular fuel line to die. i know its a solvent. but so is gas. should i reseal my pump while im converting it?

[boxer246]

Standard fuel injection hose will not stand up to Biodiesel over time.  Viton is reportedly the best, but is very expensive and hard to find.  I think Greaseworks sells it.  

Another alternative is some hose I found made by Goodyear.  It has a blue liner, and is supposed to be Biodiesel resistant, according to Goodyear's own spec sheet.  It is also hard to find, but some AutoZone stores carry it.  5/16 is the common size you will need for the VW diesel.  It is marketed as a fuel injection hose, if I remember correctly.  It  is not particularly cheap either, but much less than Viton.  

It would be a good idea to re-seal your pump....extra handy if you are doing a timing belt change, may as well do both at once.  There are re-seal kits marketed as biodiesel resistant, use one of those.