as the title says,can you put a 5 cylinder turbo diesel from a 300d into a 300sd that had a 5 cylinder turbo diesel.are they the same?thanks

yes... if the SD used an om617 and the 300D used an om617

Should be a drop in for a W126 SD. Not sure about a W116 SD. It will bolt up but I'm not sure about little things like sensors and tach amp and such.

Sixto

I think you will need to keep the mounts from the SD, as the D's engine mounts are a little different.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D

Ditto, and the throttle linkage may be different along with the oi pressure sending unit.

Agreed, I'm not sure about all the 123's but the oil line runs to the guage. On the 126 there is an electronic oil pressure sending unit.

If you are doing tranny combo, the speedometer is different also.

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Sam

84 300SD 350K+ miles ( Blue Belle )

and it is well described in this post

http://www.peachparts.com/shopforum/showthread.php?t=147394

They are compatible, but not identical. It is very important to save the bad engine (?from the 300SD) because there are some parts you will need to put on the 123 engine that you will insert in the 300SD. Also, BEWARE THE TRANNY SEPARATION. I trashed the front pump on the tranny when reassembling the tranny and replacement engine

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Der Panzermann und Fraulein Fahrvergnuegen

1991 420SEL 201K "The Big Blue One"
1985 300DT 205K chassis/285K engine nee California emissions "Goldbug"
1983 300TDT 255K "The Womble"
1983 300 DT 214K "Sea Sprite"-Rear-ended a truck
1983 300SD 285K "The Donor" Gave his life so that others can live
1980 500SL Euro 105K "Der Panzer"