Hi, all-

My 91 300D 2.5 Turbo IP just started leaking diesel at the top, from around the output to the rear cylinder, just at the base of the strange thing that connects from the IP to the injection line. What are those things anyway, and why do they have the splined area with the metal tabs to hold them from rotating?

I assume that there is some sort of O ring or something in there, maybe that got degraded by many years of biodiesel use. How do I remove the splined thing to replace the O ring, and is the adjustment critical? If I count the turns to unscrew the thing and screw it back in the same amount will that work, or is there some other adjustment procedure?

Thanks for any help..


Max Behensky

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1981 Datsun King Cab Diesel pickup
1982 240D 4 speed manual
1987 300TD wagon
1991 300D 2.5 turbo