WHile technically true, I don't think turnaing a new ABC engine over by hand a few times when it's cold will do much damage. A very rich running engine will be turning over at least 5000 rpm, or something like 90 rpm per second. It would take a LOT of turning over by hand to do much.

I agree with the others about the clicking. I've seen it on a couple of engines at the club field, guys always being concerned about it. Has never been an issue in the end though.
Dennis-