I have been using biodiesel for about a year in my 90 2.5 turbo. I have replaced the return lines and several of the 5/16" lines with viton, but there seems to be another leak that I cannot see from above. Fuel seems to be dripping from off the oil pan.

Question: what could this be? How many and what size of tubing and o-rings do I need to replace everything that is likely to leak?

Many thanks for your kind assistance!

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)

any of he inlet lines?



clean the engine bay and then check for swelling and overly soft rubber lines. This includes all lines going through the filter assembly and the ones going in/out of the fuel heater.

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-1983 VW Rabbit LS Diesel (5speed, VNT/Giles build)

mine was the fuel thermostat ( o) ring on my 93 2.5

Where is the fuel thermostat o-ring?

What size are the O rings on the 2.5 turbo? Are all the hoses 5/16th except the return lines? I would like to buy Viton lines and rings, but I do not know the sizes needed.

Thanks.

__________________
Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)

Buy Parts tab at top of page.

Best bet is to waste a can of carb or brake cleaner and spray down the fuel filter housing; and above and below the IP. Then drive it a day and check for leaks using a bright light and mirror and see where your leak originates from and address as needed.

Remember fuel blows back and CAN wick up. If its clean it should beobvious where its comming from.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)