Very interesting write-up. Thanks for sharing with the broader community. Hopefully this is the last engine for your Ghibli!!!
Were you able to figure out what caused the failure on your Motors? I had 2 motors that threw rod bearings and my guess is that the oil pickup tube is the one that is faulty. I didn't see anything wrong with the oil pump but noticed the oil pickup tube wasn't sealing very tight. My guess is that this caused the pump to suck in air and thus causing low oil pressure and not lubricating the bearings properly. I also noticed that in the newer model oil pumps, the oil pickup tube had reinforcements on the plastic while the earlier models did not. And based on the forums it seems like 2018+ Ghiblis don't have as many oil pump failures as the 14-17 Models. Pictures of the oil pumps attached for reference.If you’re talking about the crank pulley bolt it is 1-1/4 socket. If you are talking about the bearing main caps I believe they are 15mm & 13mm.