Raining W126 300SDs in PNW: Weirdness Shown on Turbo Engine in Silver SD

Here are the four "weird" things I asked if you could spot. There is also the issue of the air filter housing not having the drain pipe back into the oil pan. It could have been an engine out of a 1985 300TD but that does not fully explain why there is one common part missing.

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Problem & Solution