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Go Back   TDIClub Forums > VW TDI Discussion Areas > Alternative Diesel Fuels (Biodiesel, WVO, SVO, BTL, GTL etc)

Alternative Diesel Fuels (Biodiesel, WVO, SVO, BTL, GTL etc) Discussions about alternative fuels for use in our TDI's. This includes biodiesel WVO (Waste Vegetable Oil), SVO (Straight Vegetable Oil), BTL (Biomass to Liquid), GTL (Gas to Liquids) etc. Please note the Fuel Disclaimer.

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Old October 24th, 2007, 22:52   #1
Efrain
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Default Can I run my 1998 Jetta Tdi run on Biodiesel?

Hi there,

I just bought a 1998 Jetta TDI with the intention of using Biofuels. I want to start using Biodiesel right away but I am not sure if I have to change some of the hoses. I have heard different opionions about this. Some people say it is ok to use biodiesel with out any changes to a 1998 jetta, others say is better to replace the hoses. I know that older models use rubber hoses which eventually corrode and start leaking, and newer models come with sintetic hoses which resit the use of biodiesel.

Any advice would be appreciated.

Thank you,

Efrain
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Old October 24th, 2007, 23:28   #2
compu_85
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You can use biodiesel in that vehicle just fine. The only rubber lines are the small return lines between the injectors. All the other fuel lines are plastic.

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Old October 25th, 2007, 03:20   #3
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Welcome, you'll be just fine. Might want to keep an eye on the inter-injector lines. If they are original they are due for a changeout but the B100 might just push them over the line.
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Old October 25th, 2007, 07:40   #4
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"Might want to keep an eye on the inter-injector lines. "

When you do replace these, use the stock lines. They'll last for years.
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Old October 25th, 2007, 07:45   #5
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I'd go with Viton myself.
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Old October 25th, 2007, 07:51   #6
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The other thing to look for is the solvent effect of the biodiesel; it may dissolve all the crap in your fuel tank, lines etc and move it to your fuel filter.

Have a spare on hand and change your existing filter soon.
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Old October 25th, 2007, 13:15   #7
BioDiesel
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"'d go with Viton myself."

Hi RC,

iirc, someone who tried this found the squishy Viton slipped off and made a mess. Is there a way to avoid this?
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Old October 25th, 2007, 13:17   #8
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A small zip tie on each injector fuel tip IIRC.
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Old October 25th, 2007, 13:17   #9
tdiengine
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Default Dont forget a spare fuel filter

Quote:
Originally Posted by Efrain
Hi there,

I just bought a 1998 Jetta TDI with the intention of using Biofuels. I want to start using Biodiesel right away but I am not sure if I have to change some of the hoses. I have heard different opionions about this. Some people say it is ok to use biodiesel with out any changes to a 1998 jetta, others say is better to replace the hoses. I know that older models use rubber hoses which eventually corrode and start leaking, and newer models come with sintetic hoses which resit the use of biodiesel.

Any advice would be appreciated.

Thank you,

Efrain
Please dont forget to have a spare fuel filter.
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Old October 25th, 2007, 19:29   #10
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Quote:
Originally Posted by BioDiesel
"'d go with Viton myself."
Hi RC,
iirc, someone who tried this found the squishy Viton slipped off and made a mess. Is there a way to avoid this?
I've installed more viton than I'd care to imagine and never had a hose slip off. Did the guy have the correct hose and size?
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Old October 25th, 2007, 19:30   #11
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Quote:
Originally Posted by tdiengine
Please don't forget to have a spare fuel filter.
As one who drives a diesel should... no matter what type of fuel they burn.

The clogged filter thing is way overblown, a rarity.
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Old October 26th, 2007, 12:57   #12
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You might want to stop by my website and browse the biodiesel question and answer page.

www.itsgood4.us
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Old October 29th, 2007, 15:18   #13
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I cannot agree with RC enough -- Drive a diesel? Carry a fuel filter!

This is even more true with the newest generation of diesels. The local Dodge dealership is seeing a LOT of Sprinters coming in with clogged fuel filters. They say it is because the filtration is so fine that they clog more easily than those of the past. I have had my Sprinter fuel filter clog on my twice. Due to the scarcity of that filter, I always keep a plare and the tools in the van. Same with my TDI and my motorhome.
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Old October 29th, 2007, 18:02   #14
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Quote:
Originally Posted by tdiengine
Please dont forget to have a spare fuel filter.
Definitely good advice. Carry one in your truck always.
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