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Engine Block Plug Installation

Fig 1: Engine Block Coolant Heater
GM1602757Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Engine block plug, oil gallery, and coolant sealing washers may be used again if not bent, scored or otherwise damaged.
  1. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) to the engine block coolant heater sealing washer, if applicable. Refer to Sealers, Adhesives, and Lubricants .
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the engine block coolant heater to the engine block.

    Tighten:  Tighten the block coolant heater to 50 N.m (37 lb ft).

  3. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) to the engine block coolant drain hole plug sealing washer.
    4. Fig 2: Identifying Plug Location On Underside Of Block
    GM63164Courtesy of GENERAL MOTORS CORP.
  4. Install the engine block coolant drain hole plug.

    Tighten:  Tighten the coolant drain hole plug to 60 N.m (44 lb ft).

    5. Fig 3: Engine Block Left Front Oil Gallery Plug & Seal
    GM1552550Courtesy of GENERAL MOTORS CORP.
  5. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) to the engine block left front oil gallery plug sealing washer (117).
  6. Install the engine block left front oil gallery plug (116).

    Tighten:  Tighten the block left front oil gallery plug to 60 N.m (44 lb ft).

    7. Fig 4: Engine Block Left Rear Oil Gallery Plug & Seal
    GM1552551Courtesy of GENERAL MOTORS CORP.
  7. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) to the engine block left rear oil gallery plug sealing washer (113).
  8. Install the engine block left rear oil gallery plug (112).

    Tighten:  Tighten the block left rear oil gallery plug to 60 N.m (44 lb ft).

    9. Fig 5: View Of Engine Block Rear Oil Gallery Plug
    GM63228Courtesy of GENERAL MOTORS CORP.
  9. Inspect the engine block rear oil gallery plug and O-ring seal. If the O-ring seal on the plug is not cut or damaged, the rear oil gallery plug may be used again.
  10. Lubricate the O-ring seal with clean engine oil.
  11. Install the O-ring seal onto the plug.
  12. Install the engine block rear oil gallery plug into the oil gallery bore. A properly installed block plug will protrude 0.8-1.4 mm (0.0315-0.055 in) beyond the rear face of the block.
    13. Fig 6: Front Oil Gallery Plug
    GM1552553Courtesy of GENERAL MOTORS CORP.
  13. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) to the sides of the NEW front oil gallery plug (101).
    14. Fig 7: View Of Engine Block Front Oil Gallery Plug
    GM64295Courtesy of GENERAL MOTORS CORP.
  14. Install a NEW engine block front oil gallery plug. Install the plug into the oil gallery bore 2.2-2.8 mm (0.0086-0.011 in) below flush.
    15. Fig 8: Left Side Knock Sensor & Bolt
    GM1402136Courtesy of GENERAL MOTORS CORP.
  15. Install the left side knock sensor (718) and bolt (739).

    Tighten:  Tighten the bolt to 20 N.m (15 lb ft).

    16. Fig 9: Identifying Knock Sensor
    GM1665443Courtesy of GENERAL MOTORS CORP.
  16. Install the right side knock sensor (718) and bolt (739).

    Tighten:  Tighten the bolt to 20 N.m (15 lb ft).

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