I've reacquired my old '80 240D. Actually my son bought it from the guy who got it from the charity I donated it to. I've been helping my son rebuild the engine for the last 4 or 5 weeks.
First we removed the old engine.
Then we cleaned up parts as we took them off the old block. We also cleaned up parts from the extra engine we had in the trunk. They were really thick with grime.