OIL PUMP DISASSEMBLE

OIL PUMP DISASSEMBLE

Fig. 369: Identifying Oil Pump Thrust Washer Courtesy of GENERAL MOTORS CORP.

1. Remove the thrust (pump to drum) washer (601).

2. For pump assemblies with an ISS hole plug (248), remove plug bolt (247) and ISS hole plug (248).

3. Remove the O-ring (249) and discard.

OIL PUMP DISASSEMBLE

Fig. 370: View Of Oil Pump Cover & Oil Pump Body Courtesy of GENERAL MOTORS CORP.

4. Remove the pump cover bolts (233).

5. Remove the pump cover (215) from the pump body (200).

OIL PUMP BODY DISASSEMBLE

OIL PUMP DISASSEMBLE

Fig. 371: Removing Pump Slide Outer Spring Courtesy of GENERAL MOTORS CORP.

1. Remove the pump slide outer spring (245).

2. Place a rag over the spring while removing to prevent the spring from flying out.

OIL PUMP DISASSEMBLE

Fig. 372: Identifying Pump Vane Ring, Rotor Guide & Rotor Courtesy of GENERAL MOTORS CORP.

3. Remove the oil pump rotor (212) and pump vane rings (210).

4. Remove the pump vanes (213).

OIL PUMP DISASSEMBLE

Fig. 373: Identifying Oil Pump Slide, Pump Slide Support Seal & Pump Slide Seal Courtesy of GENERAL MOTORS CORP.

5. Remove the rotor guide (211).

6. Remove the pump slide (203), pump slide support seal (208) and the pump slide seal (209).

7. Remove the slide seal back-up O-ring seal (202) and the oil seal - slide to wear plate, ring (201).

8. Remove the pivot slide pin (205) and the pivot pin spring (204).

OIL PUMP ROTOR AND SLIDE MEASUREMENT

OIL PUMP DISASSEMBLE

Fig. 374: Measuring Oil Pump Rotor & Slide Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Measure the rotor and slide thickness for surface wear. The rotor and slide measurements must both fall into the same thickness range. If the rotor and slide measurements do not fall into the same thickness range or are outside of all the ranges, the oil pump must be replaced as an assembly.

• Refer to Oil Pump Rotor and Slide Measurement.

• Measure the oil pump rotor (212) thickness.

• Measure the oil pump slide (203) thickness.

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