I run B99 in my 300D and have replaced all my fuel lines with new lines. All the non-return lines I actually did with extra thick and resistant marine diesel lines. Question about the return lines: the NAPA lines I've put on the return seem to be sweating and getting soft after 2-3 tanks of B99. Are the new MB cloth covered return lines I can buy from this site made with synthetic rubber and thus OK with biodiesel? It's hard to find the small diameter lines and I can't find anything here in the forum that answers this question.

Thanks for any help.

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Where there's a will there's a way
1978 300D

The OE hose will be just fine for B99 applications.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

Gates or Dayco Fuel Injection hose in 5/16" work well and are B100 compatable.

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Ron Schroeder
'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
LI NY

don't forget that poly clear line from the local lawn mower repair shop works great... looks kinda wierd, but it works great.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Thanks for the tips. About that poly line from the lawnmower shop...I went to my local rental shop looking for small diameter fuel hose for return lines and they showed me this orange (I think) colored line they use for all their equipment. Said it was great stuff. But, they didn't know whether it would stand up to the alcohol in B99.

Has anyone actually used that colored poly line on their return lines with biodiesel? Just curious.

I would have thought the new NAPA line would have been fine, as I thought all fuel lines post 1996 or something were made with synthetic rubber and thus B99 compatible. They sure do seem to be softening and weeping fuel though.

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Where there's a will there's a way
1978 300D

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'98 E300TD (W210) | Sold 6/09 with 205k and counting
'04 VW Touareg V10TDI

Alcohol in B99?

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

Are you refering to PVC, or is this a different kind of clear line?

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If you are really concerned about it put some of my viton fuel return lines on. Viton is the material of choice for biodiesel and it is cheaper than the OE stuff to boot.

I buy from fastlane whenever I can. They don't sell viton components...so I do!

http://www.fryerpower.com/store/page11.html

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

Hello Jadavis,

Just thought I'd give you a heads up, I posted a link to your site to a pretty popular listserve. We have been having a running discussion re: OEM vs. Viton and the smart money ended up on the latter. I've got a '98 E300DT that I run on B100 whenever possible and had to run a few tankfuls of dino. Suddenly I'm smelling diesel...grrrrrr. Anyway, I'm going to poke around and see what I can find under the hood but will probably try and replace everything I can. So expect a big order.

Thanks for the warning! When I get home tonight I will check my stock and make sure I'm in good shape.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

Viton is thee way to go.

www.mcmaster.com

Search Viton tubing.

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300TD W124, Two VW TDI Passat Wagons,Cummins Ram 250, Kubota Tractor
23 cylinders sipping the sweet sauce of the soy bean

I love McMaster, but their minimum shipping charge is about $4.50. They ship everything by UPS and their smallest box results in the $4.50 charge.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

And it's to you the next day.

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300TD W124, Two VW TDI Passat Wagons,Cummins Ram 250, Kubota Tractor
23 cylinders sipping the sweet sauce of the soy bean

Like I said, I love McMaster! I've placed my order at 5:30pm on a Friday and got my package on a Monday before. I've also had to wait a couple of days for a shipment before. They pack it and get it out the door to UPS as fast as they can. Sometimes it is reasonable (a day or two), sometimes it is lightining fast (same day shipping). I'm sure it depends on how busy they are.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.