Complex sentence: Insufficient lubrication resulted in the disintegration of the connecting rod bearings, resulting in the conrods sometimes bursting through either one of the component engine crankcases and puncture the oil tanks, the contents of which would pour on to the overheated central exhaust pipe collector.
Split into simpler sentences: Insufficient lubrication resulted in the disintegration of the connecting rod bearings. They would burst through either one of the component engine crankcases and puncture the oil tanks, the contents of which would pour on to the hot central exhaust pipe collector.