Rebuilt Engine bearing wear

cudamark said

That pretty much narrows it down to that cylinder. It's going to be a bad or wrong sized bearing, Loose rod studs/nuts, no oil to that bearing, bad wrist pin and/or bushing, cracked piston, piston slap due to too much cylinder wall clearance, etc.

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It's got to be something wrong with the bearing or rod I think. Only thing I messed with was the bearing. Same cylinder made the same noise when this engine was fresh... the ONLY thing that the machine didn't check was the roundness of the rod. He may have even done that. Just didnt ask. He said he check the roundness of the crank. I just can't see why it would start knocking with fresh bearings... and the fact the same cylinder did this earlier but it went away has me lost. I'm gonna have to drop the pan again... which is actually simple. I'm just sick of this engine.