Oil Pump Disassemble

Remove the oil pump driveshaft and oil pump driveshaft retainer.

Fig 1: Fuel Pump, Driveshaft & Driveshaft Retainer
Courtesy of GENERAL MOTORS CORP.

Important: DO NOT remove the oil pump screen from the pipe. The pipe and oil pump screen are serviced as a complete assembly.

Fig 2: Remove Oil Pump Screen Only If Necessary
Courtesy of GENERAL MOTORS CORP.
Remove the oil pump screen, if necessary.
The oil pump screen has a press fit into the oil pump cover.
Remove the oil pump cover bolts.

Fig 3: Removing Oil Pump Cover Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the oil pump cover.

Fig 4: Removing Oil Pump Cover
Courtesy of GENERAL MOTORS CORP.
Remove the oil pump drive gear and the oil pump driven gear.
Matchmark the gear teeth for assembly.

Fig 5: Removing Oil Pump Gears
Courtesy of GENERAL MOTORS CORP.

CAUTION: In some models, the pressure regulator valve spring is under pressure. Remove the retaining pin carefully in order to avoid bodily injury.
Remove the following items:
1. 7.1 The oil pump pressure relief valve spring straight pin.
2. 7.2 The oil pump pressure relief spring.
3. 7.3 The oil pump pressure relief valve. If the valve is stuck, soak the pump housing in cleaning solvent.
Fig 6: Removing Oil Pump Pressure relief Valve
Courtesy of GENERAL MOTORS CORP.