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Author Topic: Biodiesel and fuel lines...  (Read 1943 times)

November 09, 2010, 10:11:14 pm

dankcorey22

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Biodiesel and fuel lines...
« on: November 09, 2010, 10:11:14 pm »
Okay my friend makes bio fuel and he gave me 5 gallons (B100) i added it to about 6 gallons of D2

The result: after 1 week (i have not added anything to my tank yet) i notice a big leak from my lines. it was my return line. i put new rubber lines on there and when i was changing my fuel filter i noticed all the rubber on my lines was getting softer...

my cars is a 99.5 i guess that is when VW still made the lines natural rubber. is that why the biodiesel is getting ate up?

Any input is appreciated 


MY CARs-BLACK 99.5 Jetta TDI 5 speed 93,000- DC Stage 2 Clutch Kit 14Lb FW, Afe air intake box, 2.5" DP, 11mm IP, 2.5" stright piped, boost gauge, PP764, RC5 (WOW), 3-Bar, McNally EGT/Boost, 17/22, Race Pipe, EGR Cooler Delete, PD lift pump, R32 MAF housing,FMIC

1983 VW Jetta 1.6 turbo fuel mods

Reply #1November 10, 2010, 07:53:03 pm

chiefdiesel

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Re: Biodiesel and fuel lines...
« Reply #1 on: November 10, 2010, 07:53:03 pm »
The fuel lines should be replaced with Viton fuel hoses.
2 B4 Passats Ecodes/HID/pp764/rc2
'85 Jetta coupe 1.6 n/a
'80 Caddy 110 (afn) m-tdi/12mm Lt 2.8 ip/.216/fmic

Reply #2November 10, 2010, 09:49:50 pm

81 vw pu

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Re: Biodiesel and fuel lines...
« Reply #2 on: November 10, 2010, 09:49:50 pm »
I've been running B-100 in my caddy for about 5 years. I use the transparent blue polyurethane fuel line that you can buy at most motorcycle shops. It has a temp rating of -65 f to 220 f. Another good line I use on my old ford IDI and my old cummins is nylon air brake line, mostly just for supply and return. For the injector jumpers on the ford and caddy I use the transparent blue polyurethane so I can keep an eye on any air bubbles.

Reply #3November 10, 2010, 10:10:57 pm

dankcorey22

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Re: Biodiesel and fuel lines...
« Reply #3 on: November 10, 2010, 10:10:57 pm »
If the bio has eaten my fuel lines on the inside will it hurt the pump? since the bi-product of the bio eating the line.
MY CARs-BLACK 99.5 Jetta TDI 5 speed 93,000- DC Stage 2 Clutch Kit 14Lb FW, Afe air intake box, 2.5" DP, 11mm IP, 2.5" stright piped, boost gauge, PP764, RC5 (WOW), 3-Bar, McNally EGT/Boost, 17/22, Race Pipe, EGR Cooler Delete, PD lift pump, R32 MAF housing,FMIC

1983 VW Jetta 1.6 turbo fuel mods