59. Engine Block Plug Installation

- Tools Required
- J 41712 0il Pressure Switch Socket

Caution: Refer to Safety Glasses Caution in Service Precautions.





1. Install the transmission locator pins (if required).
A properly installed transmission locator pin will protrude 12.7 mm (0.5 inch) from the rear face of the engine block.





2. Apply sealant GM P/N 12346004 or equivalent to the outside diameter of the NEW expansion cup plug (camshaft rear bearing hole).
3. Install the NEW expansion cup plug (camshaft rear bearing hole).
A properly installed expansion cup plug will be installed 8.8 mm (0.348 inch) into the rear of the engine block.





4. Install the S type pin (crankshaft rear oil seal housing locator).





5. Apply sealant GM P/N 12346004 or equivalent to the threads of the left side rear and left rear top engine oil gallery plugs.

Notice: Refer to Fastener Notice in Service Precautions.

6. Install the left side rear and left rear top oil engine gallery plugs.
- Tighten the left side rear and left rear top engine oil gallery plugs to 20 Nm (15 ft. lbs.).





7. Apply sealant GM P/N 12346004 or equivalent to the threads of the square socket plugs (engine block oil gallery).
8. Install the square socket plugs.
- Tighten the square socket plugs to 20 Nm (15 ft. lbs.).





9. Apply sealant GM P/N 12346004 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.





11. Apply threadlock GM P/N 12345382 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 with the bottom of the chamfer (1) of the engine block core hole.





13. Apply sealant GM P/N 12346004 or equivalent to the threads of the engine block coolant drain hole plug.
14. Install the engine block coolant drain hole plug.
- Tighten the engine block coolant drain hole plug to20 Nm (15 ft. lbs.).





15. Apply sealant GM P/N 12346004 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 the engine oil pressure sensor fitting to 15 Nm (11 ft. lbs.).

Important: Do not rotate the engine oil pressure sensor fitting more than 359° after the initial torque has been obtained.

17. Rotate the engine oil pressure sensor fitting clockwise to the proper position (1), 50° from the centerline (2).





18. Apply sealant GM P/N 12346004 or equivalent to the threads of the engine oil pressure gauge sensor.
19. Install the engine oil pressure gauge sensor using the J 41712.
- Tighten the engine oil pressure gauge sensor to 30 Nm (22 ft. lbs.).





20. Apply sealant GM P/N 12346004 or equivalent to the threads of the knock sensor.
21. Install the knock sensor.
- Tighten the knock sensor to 19 Nm (14 ft. lbs.).