My W123 617.952 Engine Swap Thread

[dieseldan44]

Hey everyone,

Engine swap from my parts car 1984 300D into 'Tex', the rust free 300D. Both engines are still in their respective vehicles.

The engine to be replaced actually still runs OK - doesn't start below 40F. Has a lot of blowby, and low compression (~220-240) on cylinders 4 and 5. Exterior of the engine is in good shape and will be used for parts.

Donor engine has 170K on the clock and has excellent compression (380) on all cylinders. Runs and starts like a dream. The donor car also still runs well, but is not street worthy due to poor brakes.

Few few questions as I begin my journey...

1.) The donor engine needs a general tune-up as it smokes (white) more than I'd like it to at idle. It probably also needs injectors and a timing adjustment. Should I do this before or after the swap?

2.) The donor engine is going to be on a stand for a while. It has 170K on the clock. What should I do to it while it is out? My goal is to put the time in now and do as much PM up front as I can.

My list thus far:

- turbo oil line
- oil cooler lines
- gasket between oil filter and block
- oil pan gasket (it's leaking)
- take of manifolds and clean
- possibly replace turbo

Any other engine swap advice much appreciated.

Thanks, more to come...
dd