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Home › Chevrolet › 2007 › Impala SS › Repair and Diagnosis › Engine Mechanical › Engine Mechanical - 5.3L › Repair Instructions › Off-Vehicle Repair Instructions › Engine Block Plug Removal

Engine Block Plug Removal

    Fig 1: Identifying Engine Block Coolant Heater
    GM1552549Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine block coolant heater (114).
    2. Fig 2: Identifying Plug Location On Underside Of Block
    GM63164Courtesy of GENERAL MOTORS CORP.
  2. Remove the engine block coolant drain hole plug.
    3. Fig 3: Engine Block Left Front Oil Gallery Plug
    GM1602758Courtesy of GENERAL MOTORS CORP.
  3. Remove the engine block left front oil gallery plug.
    4. Fig 4: View Of Engine Block Left Rear Oil Gallery Plug
    GM64923Courtesy of GENERAL MOTORS CORP.
  4. Remove the engine block left rear oil gallery plug.
  5. Inspect the block plug sealing washers.

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

    6. Fig 5: View Of Engine Block Rear Oil Gallery Plug
    GM63228Courtesy of GENERAL MOTORS CORP.
  6. Remove the engine block rear oil gallery plug.
  7. 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 used during assembly.

    8. Fig 6: View Of Engine Block Front Oil Gallery Plug
    GM64295Courtesy 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.
  8. Remove the engine block front oil gallery plug.
    9. Fig 7: Left Side Knock Sensor & Bolt
    GM1402136Courtesy of GENERAL MOTORS CORP.
  9. Remove the left side knock sensor (718) and bolt (739).
    10. Fig 8: Identifying Knock Sensor
    GM1665443Courtesy of GENERAL MOTORS CORP.
  10. Remove the right side knock sensor (718) and bolt (739).
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