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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 855 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Engine Block Plug Removal

Engine Block Plug Removal

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Tools Required 

J 41712  Oil Pressure Switch Socket

Important:  Do not remove the engine block front oil gallery plug unless service is required.

If the front oil gallery plug is removed for service, a NEW oil gallery plug must be installed.

  1. Remove the oil pressure sensor, if not previously removed, using the J 41712  or equivalent.
    Fig 1: Removing Oil Pressure Sensor Using J 41712
    G02116688Courtesy of GENERAL MOTORS CORP.
  2. Remove the engine block right rear coolant plug.
    Fig 2: Removing Engine Block Right Rear Coolant Plug
    G02116689Courtesy of GENERAL MOTORS CORP.
  3. Remove the engine block coolant heater, if applicable.
    Fig 3: Removing Engine Block Coolant Heater
    G02116690Courtesy of GENERAL MOTORS CORP.
  4. Remove the engine block left rear coolant plug, if applicable.
    Fig 4: Removing Engine Block Left Rear Coolant Plug
    G02116691Courtesy of GENERAL MOTORS CORP.
  5. Remove the engine block left front oil gallery plug.
    Fig 5: Removing Engine Block Left Front Oil Gallery Plug
    G02116692Courtesy of GENERAL MOTORS CORP.
  6. Remove the engine block left rear oil gallery plug.
  7. Inspect the block plug sealing washers.

    If the block plug and heater sealing washers are not damaged, they may be used during assembly.

    Fig 6: Removing Engine Block Left Rear Oil Gallery Plug
    G02116693Courtesy of GENERAL MOTORS CORP.
  8. Remove the engine block rear oil gallery plug.
  9. Inspect the O-ring seal of the rear oil gallery plug.

    If the O-ring seal is not cut or damaged, the plug and O-ring seal may be use during assembly.

    Fig 7: Removing Engine Block Rear Oil Gallery Plug
    G02116694Courtesy of GENERAL MOTORS CORP.

    Important:  Remove the front oil gallery plug only if service is required.

    If the front oil gallery plug is removed, a NEW oil gallery plug must be installed.

  10. Remove the engine block front oil gallery plug.
    Fig 8: Removing Engine Block Front Oil Gallery Plug
    G02116695Courtesy of GENERAL MOTORS CORP.
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