I once had an engine that had a dead knock sounded metallic to no end. it turned out to be a bad injector and it was just purely nailing on that cylinder. Might want to check that out. Or remove the rockers and turn the engine over (Im not sure if the cam will hit the valves without the rockers..

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.