Engine Block Plug Installation

Tools Required 

J 41712  Oil Pressure Switch Socket

1. Install the transmission locator pins, if required.

   A properly installed transmission locator pin will protrude 12.7 mm (0.5 in) from the rear face of the engine block.

   Fig 1: Installing Transmission Locator Pins

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2. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the outside diameter of the NEW camshaft rear bearing hole expansion cup plug.
3. Install the NEW camshaft rear bearing hole expansion cup plug.
   Fig 2: Installing Camshaft Rear Bearing Hole Expansion Cup Plug

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4. Install the crankshaft rear oil seal housing locator S type pin.
   Fig 3: Installing Crankshaft Rear Oil Seal Housing Locator S Type Pin

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5. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the threads of the left side rear and left rear top engine oil gallery plugs.
6. Install the left side rear and left rear top oil engine gallery plugs.

   Tighten 

   Tighten the left side rear and left rear top engine oil gallery plugs to 20 N.m (15 lb ft).

   Fig 4: Installing Left Side Rear & Left Rear Top Oil Engine Gallery Plugs

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7. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the threads of the square socket engine block oil gallery plugs.
8. Install the square socket plugs.

   Tighten 

   Tighten the square socket plugs to 20 N.m (15 lb ft).

   Fig 5: Installing Square Socket Plugs

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9. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent to the outside diameter of the NEW engine oil gallery plugs.
10. Install the NEW engine block oil gallery plugs. A properly installed engine oil gallery plug must be installed below flush with the front face of the engine block.
    Fig 6: Installing Engine Block Oil Gallery Plugs

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11. Apply threadlock GM P/N United States 12345382, GM P/N Canada 10953489, or equivalent, to the outside diameter of the NEW engine block core hole plugs.
12. Install the NEW engine block core hole plugs.

    A properly installed engine block core hole plug must be installed flush or below the bottom of the chamfer (1) of the engine block core hole.

    Fig 7: Installing Engine Block Core Hole Plugs

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13. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the threads of the engine block coolant drain hole plug.
14. Install the engine block coolant drain hole plug.

    Tighten 

    Tighten the engine block coolant drain hole plug to 20 N.m (15 lb ft).

    Fig 8: Installing Engine Block Coolant Drain Hole Plug

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15. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the threads of the engine oil pressure sensor fitting.
    IMPORTANT: Do not loosen the oil pressure sensor fitting after the initial torque has been obtained.
16. Install the engine oil pressure sensor fitting.

    Tighten 

    Tighten the engine oil pressure sensor fitting to 15 N.m (11 lb ft).

    IMPORTANT: Do not rotate the engine oil pressure sensor fitting more than 359 degrees after the initial torque has been obtained.
17. Rotate the engine oil pressure sensor fitting clockwise to the proper position (1), 50 degrees from the centerline (2).
    Fig 9: Installing Engine Oil Pressure Sensor Fitting

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18. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the threads of the engine oil pressure gage sensor.
19. Install the engine oil pressure gage sensor using the J 41712  .

    Tighten 

    Tighten the engine oil pressure gage sensor to 30 N.m (22 lb ft).

    Fig 10: Installing Engine Oil Pressure Gage Sensor

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20. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the threads of the knock sensor.
21. Install the knock sensor.

    Tighten 

    Tighten the knock sensor to 19 N.m (14 lb ft).

    Fig 11: Installing Knock Sensor

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