is the water pump from an 80 300D interchangable with an 84 SD? i found a turbo and like to switch but the water pump is bad..

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'79 240D
'79 300SD

those that are missed:
'80 300TD bandit
'76 300D cleta jill

Check the two parts numbers at 'Buy Parts' at the top of this screen.

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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

Agreed, but I believe it's the same engine, same water pump.

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83 SD

84 CD