Here are some other facts I've put together. The lower oil pan looks to have been replaced. The motor came out of an junk yard car that set for god knows how long, at least 5 years. The crank case breather was capped and driven like that for a few miles before dying, owner thought the rings were shot and sold me the car. The motor is easier to turn by hand until one of the pistons hit the top of its stroke, unknown which, and then requires more effort and I hear a very small clack.

__________________
84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800