Oil Pump Diagram - Inner/Outer Rotor, Pressure Regulator & Oil Flow (A16546-A)

This document is a single labeled line-art illustration of an engine oil pump assembly, shown installed in/against the engine front cover or pump housing. Callouts identify the main components of a gerotor-style oil pump: the INNER ROTOR and OUTER ROTOR at the center of the pump cavity, the OIL PUMP BODY (the surrounding casting), and the PRESSURE REGULATOR (shown as a spring-loaded plunger assembly below the rotors). Directional arrows trace the oil flow path: oil enters FROM OIL PAN at the bottom, circulates around the rotor set, and exits TO OIL COOLER at the upper right. A PUNCH MARK is called out on the outer rotor, indicating an orientation/assembly reference mark. The figure reference number A16546-A appears at the bottom right. There are no torque values, part numbers (other than the figure number), dimensions, or year/model statements visible. A reader can learn the identity and relative position of oil pump internals, the oil flow direction through the pump, and that the rotor punch mark must be observed during assembly. The scan was filed under a 1993 Mazda MX-3, but the drawing itself contains no vehicle identification.