LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 427 (Engine Mechanical - 4.8L, 5.3L, & 6.0L (Unit Repair)) >> Repair Instructions >> Engine Block Plug Removal

Engine Block Plug Removal

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

J 41712 Oil Pressure Sensor 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
    G01674669Courtesy of GENERAL MOTORS CORP.
  2. Remove the engine block right rear coolant plug.
    Fig 2: Engine Block Coolant Plug (Right Rear)
    G01674670Courtesy of GENERAL MOTORS CORP.
  3. Remove the engine block coolant heater, if applicable.
    Fig 3: Engine Block Coolant Heater
    G01674671Courtesy of GENERAL MOTORS CORP.
  4. Remove the engine block left rear coolant plug, if applicable.
    Fig 4: Engine Block Coolant Plug (Left Rear)
    G01674672Courtesy of GENERAL MOTORS CORP.
  5. Remove the engine block left front oil gallery plug.
    Fig 5: Engine Block Oil Gallery Plug (Left Front)
    G01674673Courtesy 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: Engine Block Oil Gallery Plug (Left Rear)
    G01674674Courtesy 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: Engine Block Oil Gallery Plug (Rear)
    G01674675Courtesy 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: Engine Block Front Oil Gallery Plug
    G01674676Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals