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Old 03-06-2013, 02:51 AM
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Location: SF, CA, USA
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i have weeping return lines and i want to start running biodiesel. ergo, i should replace the fuel hoses beneath the tank, through the prefilter, and the cigar hose... plus more?

the figures 1 and 2 meters in quantity have been thrown around here, and i'm not worried about the exact amount, but will i be able to use bulk line for all these hoses except the cigar hose? what kind of hose clamps are called for?

here is the product i'm looking at, hopefully doing it in bulk will cost me less than the $120 this place wants for a kit with no description of what it includes:
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Old 03-06-2013, 08:27 AM
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Location: Long Beach,CA
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The Hoses at the Tank can be replaced with 5/16" ID Hose as well as the 2 sections of the Fuel Inlet Hose from the Fender Well to the Fuel Supply Pump.

Fuel Injection Hose SAE J30R9 or 30R90 SAE 30R9 that you can get a regular Auto Parts Store is lined with Viton; to Goodyear version has a Blue lining and there is also a Gates Version. Some where around $6 a foot.

On the Hose that attaches to the Fuel Tank Screen you need to file or grind off the crimped Collar and remove it. That leave you with a Hose Barb that you can use any Hose on.

The Cigar Hose does not seem to be prone to leaking as like the Other Hoses. However, that could be replaced with the 5/16" ID Hose. But, if it the Pulsation of the Hose makes noise you will need to revert back to the Cigar Hose.

For the Injector Return Lines you will need to find one of the threads if you want Viton. Some Member said some Hose is thinner than others.

Some People have used Plasti Weed Wacker Fuel Hose from a Lawn Mower Repair Shops: Injector return hose plastic tube
any lawnmower/chainsaw repair shop should have hose that will work too.
I bought a 50' box of 1/8" tygon clear fuel hose and the stuff holds up for about 3 years.
cost me like 15.00
The brand I used is Oregon, it is a Tygon fuel hose.
Tygothane (Saint Gobain is the Manufacturer)
U.S. Plastics is the retailer.
TygonŽ Tubing Category | Tygon, Tygon Tube and Tygon Lab Tubing. | U.S. Plastic Corp.
More Notes: Authousaz has this info next to the Fuel Return Line: Fuel Hose/Line; 3.2mm ID x 1.9mm;
According to this site: Convert inches to mm - Conversion of Measurement Units
1/8"= 0.125"=3.175mm
So 1/8" ID Hose is actually a little tighter than the 3.5mm stock Hose.

Also for the Fuel Return Lines Mercedes and the VW Dealer sell it in 1 meter legths and if you are careful cutting 1 meter is enough for a 5 Cylinder. In fact 1 meter was enough for My 6 cylinder Volvo
84 300D, 82 Volvo 244Gl Diesel
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Old 03-06-2013, 12:13 PM
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I'm using the Tygon fuel line for the return lines. I picked some up when I had a sudden failure of an old braided return line. The bicycle ride to the lawnmower shop was much shorter than to the dealer! I was going to just use it for a "get me by" sort of deal but it worked so well I swapped all of the return line for it. I'm running B99.

I kind of like them being transparent, too, not unlike the original plastic fuel lines from the secondary filter housing. I can see the fuel moving as I pump the primer.
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Old 03-06-2013, 01:00 PM
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Viton hose and O-ring kit sources

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Old 03-08-2013, 03:01 AM
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Location: SF, CA, USA
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thanks all, that was very helpful. the only thing i am still trying to figure out is which and how many hose clamps i will need. cheers!
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