This five-stage oil pump (four scavenge, one pressure) has fine mesh screens embedded in the fittings at the ends of the number 12 lines to minimize the risk of particles entering the pump. But in the aftermath of a blow-up, fine debris usually penetrates to the heart of the system, and the lines and pump parts have to be cleaned and the rotors buffed smooth if necessary. Each of the four scavenge pumps conveys oil from assigned areas of the oil pan and transports it into the oil reservoir. The pressure pump (the one at the end) pumps oil from the bottom of the reservoir and into the filter. From the filter, it is transported into the block.

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