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Before any of the reciprocating assembly was installed, the engine was treated to a thorough cleaning and deburring of casting flash and other sharp edges. Here, the oil galley at the rear main bearing cap was smoothed and radiused. This minor step in block preparation smoothes the transition of oil out of the galley, which reduces cavitation and oil pressure fluctuation. And since the engine will likely be run consistently with less than 3 quarts of oil, ensuring constant oil pressure is an obvious concern.