It took two of us in the crankshaft hole with a slugging wrench and a sledge hammer to remove the connecting rod nut if we were pulling a piston. I ran the building and we had lock out tag out procedures. I had to climb in the cylinder with a hand grinder to scuff the liner where the skirt had marred it. This was in NJ and we were trying to run the engine to meet the air quality requirements. The cylinder lubricators were timed wrong and they burnt up quite a few cylinders. If the liner would crack, the cooling water would flood the system. Quite an experience.