That's pretty much what I understood.. I have the engine apart and can see no obvious evidence that the bearings are bad. There is no real vertical play in any of the bearings and very little rock, and no discoloration of the bearing needles. The engine was designed so that the connecting rods can float laterally quite a bit. I'm measuring and the total lateral movement is close to .125. The bearings simply can't account for what I was hearing but the lateral movement can. I'm wondering if that is what I was hearing? While running the engine sounded normal. is it possible that the lateral movement of the connecting rods can produce a clicking noise? I'm hoping someone can answer that question before I bolt the engine back together. I am trying to make an IMAC contest next weekend so this has to be sorted out by Monday.