The Cummins 24V had a fair amount of trouble with the lift pump failing and taking out the IP since the IP is lubricated by the fuel. Expensive repair. The earlier ones also had the killer dowel pin.
I'm surprised these problems have not put a serious dent in their reputation.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13