Engine Block Plug Installation

Tools Required 

J 41712  Oil Pressure Switch Socket

Important: 

• Engine block plug, including oil gallery, and coolant, and coolant heater, sealing washers may be used again if not bent, scored or otherwise damaged.
• Apply the proper amount and type of sealant to the sealing washer as recommended in the service procedure.

1. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block coolant heater sealing washer, if applicable.
   NOTE: Refer to FASTENER NOTICE .
2. Install the engine block coolant heater to the engine block, if applicable.
   Fig 1: Installing Engine Block Coolant Heater To Engine Block

   Courtesy of GENERAL MOTORS CORP.

   Tighten 

   Tighten the block coolant heater to 40 N.m (30 lb ft).

3. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block left front coolant drain plug sealing washer, if applicable.
4. Install the engine block left front coolant drain plug, if applicable.

   Tighten 

   Tighten the block left front coolant drain plug to 60 N.m (44 lb ft).

   Fig 2: Installing Engine Block Left Front Coolant Drain Plug

   Courtesy of GENERAL MOTORS CORP.
5. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block right rear coolant drain plug sealing washer.
6. Install the engine block right rear coolant drain plug.

   Tighten 

   Tighten the block right rear coolant drain plug to 60 N.m (44 lb ft).

   Fig 3: Installing Engine Block Right Rear Coolant Drain Plug

   Courtesy of GENERAL MOTORS CORP.
7. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block left front oil gallery plug sealing washer.
8. Install the engine block left front oil gallery plug.

   Tighten 

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

   Fig 4: Installing Engine Block Left Front Oil Gallery Plug

   Courtesy of GENERAL MOTORS CORP.
9. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block left rear oil gallery plug sealing washer.
10. Install the engine block left rear oil gallery plug.

    Tighten 

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

    Fig 5: Installing Engine Block Left Rear Oil Gallery Plug

    Courtesy of GENERAL MOTORS CORP.
11. 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.
12. Lubricate the O-ring seal with clean engine oil.
13. Install the 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.
    Fig 6: Installing Engine Block Rear Oil Gallery Plug And O-Ring Seal

    Courtesy of GENERAL MOTORS CORP.

    Important:  The engine block front oil gallery plug should not be removed unless service is required.

14. Apply sealant GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the sides of the NEW front oil gallery plug.
15. Install a NEW engine block front oil gallery plug, if required. Install the front oil gallery plug into the oil gallery bore 2.2-2.8 mm (0.0086-0.011 in) below flush.

    Do not install the plug more than the recommended depth.

    Fig 7: Installing Engine Block Front Oil Gallery Plug

    Courtesy of GENERAL MOTORS CORP.
16. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the oil pressure sensor.
17. Use the J 41712  or equivalent in order to install the oil pressure sensor, if required.

    Tighten 

    Tighten the oil pressure sensor to 20 N.m (15 lb ft).

    Fig 8: Installing Oil Pressure Sensor

    Courtesy of GENERAL MOTORS CORP.