I tried a few searches but couldn't find the exact info needed.

Can somebody tell me quickly what size fuel lines I've got on my 78 240D, and maybe how to source some Viton or other platicized line appropriate for biodiesel?

I've got a leak right now in the small injector return lines. This doesn't seem to be biodiesel related but rather the result of age because the line I pulled off cracked and was very hard, not swelling. I did cut off a section of the return line to take to an auto parts store and measure, but I don't have a measuring caliper to make things accurate and easy...

I do have noticeable swelling in the return line from the top of the fuel filter housing to the hard line running back to the tank, so I would like to do this all at once. The lines back between the tank and the hard lines look good.

Running up to B99.

All help appreciated.

Thanks,
B

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1978 240D 4 spd. manual
1983 Toyota Land Cruiser BJ42 Diesel 5 spd.

Both biodiesel powered