What components are identified in this oil pump diagram?

The diagram labels the inner rotor, outer rotor, punch mark, oil pump body, pressure regulator, the inlet from the oil pan, and the outlet to the oil cooler.

Where does the oil pump draw oil from and where does it send it?

Arrows show oil entering the pump from the oil pan and exiting to the oil cooler.

Where is the pressure regulator located?

The pressure regulator is shown as a spring-loaded valve installed in a bore in the oil pump body, in the oil flow path after the rotors.

What is the punch mark shown on the rotor?

The diagram points out a punch mark on the outer rotor area; it is called out as an identification/orientation mark, though the page gives no further instructions about it.

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Engine Oil Pump Diagram - Inner/Outer Rotor, Pressure Regulator & Oil Flow

Oil pump diagram labeling inner/outer rotor, pump body, pressure regulator and oil flow

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Oil pump component diagram identifying inner and outer rotors, pump body, pressure regulator and oil flow paths.

AI caption May 2012 · Photo 224 of 912

This document is a labeled line-art diagram of an engine oil pump assembly, apparently reproduced from a service manual page (figure reference A16546-A). The illustration shows the oil pump body mounted on the front of an engine block, with the pump cover removed to expose the gerotor-style pumping elements. Callouts identify the INNER ROTOR and OUTER ROTOR, a PUNCH MARK on the rotor (an orientation/assembly reference), the OIL PUMP BODY casting, and the PRESSURE REGULATOR (a spring-loaded relief valve shown exploded out of its bore). Arrows drawn through the diagram trace oil flow: oil enters FROM OIL PAN, passes through the rotor set, past the pressure regulator, and exits TO OIL COOLER. A reader can learn the internal layout of the oil pump, the direction of oil flow through the pump and regulator circuit, the location of the pressure relief/regulator valve, and that the rotors carry a punch mark that should be observed during reassembly. No torque values, part numbers (other than the figure code), clearances, or year/model applicability statements appear on this page; it is purely an identification and flow-path diagram.

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Frequently asked questions

What components are identified in this oil pump diagram?: The diagram labels the inner rotor, outer rotor, punch mark, oil pump body, pressure regulator, the inlet from the oil pan, and the outlet to the oil cooler.
Where does the oil pump draw oil from and where does it send it?: Arrows show oil entering the pump from the oil pan and exiting to the oil cooler.
Where is the pressure regulator located?: The pressure regulator is shown as a spring-loaded valve installed in a bore in the oil pump body, in the oil flow path after the rotors.
What is the punch mark shown on the rotor?: The diagram points out a punch mark on the outer rotor area; it is called out as an identification/orientation mark, though the page gives no further instructions about it.