NO, water pump is the same for ALL 616/617 engines. The rear tranny mount and driveshaft (front half) are all that vary. The shifter rods too (by 4" if I recall )

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1982 300SD (214 k, excellent shape) kidmobile running mostly biodiesel, gets 31 mpg hwy with 2.82 rear from a euro 500SEL



1976 115 body 240D 4-speed (traded for Jeep parts) - Engine lives on in my CJ7