Will any of the 300TD 80- 85 engines fit or are there weird incompatible bits or can you switch the bits from the old engine to the new. I am not too familiar with the 617 engines. What definitely won't fit.?? Cheers Dan

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It's always something simple
91 300D 603.960 (from japan) 194K
92 Toyota Diesel Landcruiser HDJ81-t 116K
02 Golf TDI new head courtesy of PO
87 300D
97 BMW 525 TDS Wagon 5spd
bunch of Onan and other diesel generators

These are qualified donors:

81-85 300SD
81-85 300TD
82-85 300D
82-85 300CD

I don't know what it takes to get a 78-80 300SD engine in there. Probably not much.

81-85 300TD engines have an SLS pump attached to the head that can be disabled. Waste isn't the best word but that's what someone looking for a replacement head with SLS might think of it.

Sixto
87 300D

I'm looking at information gleaned from Wikipedia:
1980-1985 300SD W126.120 OM617.951 3.0L I5

So, it looks like the engine in the SD *should* be an OM617. According to the same source, the engine in the comparable model year 300D is an OM617.952.

I'm nowhere near an expert to say if the motor mounts and tranny mating will be any problem.

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Codifex
1981 240D ChinaBlue (Got her running with a donor engine.)
1983 300DTurbo w/sunroof.
1984 300TD manual sunroof. (Electrical Gremlins)

I'm not sure about the Wikipedia entry. The 1980 300SD is a W116, not a W126. The 78-80 300SD uses a 617.950.

If you're acquiring the SD complete with dead engine, you should have everything you need to end up with a running car if all you bring to the party is a good 617.951 or .952 long block... with IP if the SD IP is bad. There might be a little more parts swapping with a .950 but I can't imagine it's a deal breaker. Nor can I imagine you'll find a good used .950 before you find a dozen good .951s and .952s.

Sixto
87 300D

If the motor comes out of a w123 chassis (300d, 300cd, 300td) you will need to change the 'horns' for the motor mounts. (Also, as noted, the td will have the SLS pump in the head.)

The oil filter canister is different on the w123 motors as well. I believe you need to change it in order to bolt up the existing oil cooler lines.

The 78-80 motors installed in the w116 cars have more differences (for example, the oil pan), except for the 1980 California model cars, which I believe got the same engine as installed in the later w126 body.

Even moving between years of OM617 installed in a w126 you will run into differences in pulley setup and alternator mountings. The easiest way is always if you can have the entire donor car sitting beside the destinee car to compare each part.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

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