GM CHEVROLET z r q I a 6 4 0 6 CYLINDER 1 r 3 8 CYLINDER OIL PUMPS TYPICAL KEY DESCRIPTION GROUP KEY DESCRIPTION GROUP 1 NOT SERVICED SEPARATELY Part of Oil 5 VALVE Oil Pressure Regulator 1 671 Pump Assy 1 652 6 SPRING Oil Pressure Regulator Valve 1 671 2 COVER Oil Pump 1 723 7 RETAINER Oil Pressure Regulator Valve Spring 1 671 3 SCREW or BOLT Oil Pump 1 672 S GASKET Oil Pump Cover 1 724 4 PIN Oil Pump Groove 1 652