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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.3L (Unit Repair) >> Repair Instructions >> Oil Pump Disassemble

Oil Pump Disassemble

  1. Remove the oil pump driveshaft and oil pump driveshaft retainer.
    Fig 1: Oil Pump Driveshaft & Oil Pump Driveshaft Retainer
    G01660460Courtesy 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.

  2. Remove the oil pump screen, if necessary. The oil pump screen has a press fit into the oil pump cover.
    Fig 2: Oil Pump & Screen
    G01660461Courtesy of GENERAL MOTORS CORP.
  3. Remove the oil pump cover bolts.
    Fig 3: Oil Pump Cover & Bolts
    G01660462Courtesy of GENERAL MOTORS CORP.
  4. Remove the oil pump cover.
    Fig 4: Oil Pump Cover
    G01660463Courtesy of GENERAL MOTORS CORP.
  5. Remove the oil pump drive gear and the oil pump driven gear.
  6. Matchmark the gear teeth for assembly.
    Fig 5: Oil Pump Drive & Driven Gears
    G01660464Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
  7. 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
    Fig 6: Oil Pump Pressure Relief Valve Spring Straight Pin, Spring & Valve
    G01660465Courtesy of GENERAL MOTORS CORP.
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