1. Engine Block Plug
TOOL REQUIRED^ J 41712 Oil Pressure Sensor Socket, or equivalent.
NOTE: Engine block plug (oil gallery, and coolant, and coolant heater) sealing washers may be reused 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 inch) bead of GM P/N 12346004 or equivalent to the engine block coolant heater sealing washer (if applicable).
2. Install the engine block coolant heater to the engine block (if applicable). Tighten the block coolant heater to 40 Nm (30 ft. lbs.).
3. Apply a 3.175 mm (0.125 inch) bead of GM P/N 12346004 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 the block left front coolant drain plug to 60 Nm (44 ft. lbs.).
5. Apply a 3.175 mm (0.125 inch) bead of sealant GM P/N 12346004 or equivalent to the engine block right rear coolant drain plug sealing washer.
6. Install the engine block right rear coolant drain plug. Tighten the block right rear coolant drain plug to 60 Nm (44 ft. lbs.).
7. Apply a 3.175 mm (0.125 inch) bead of sealant GM P/N 12346004 or equivalent to the engine block left front oil gallery plug sealing washer.
8. Install the engine block left front oil gallery ping. Tighten the block left front oil gallery plug to 60 Nm (44 ft. lbs.).
9. Apply a 3.175 mm (0.125 inch) bead of sealant GM P/N 12346004 or equivalent to the engine block left rear oil gallery plug sealing washer.
10. Install the engine block left rear oil gallery plug. Tighten the block left rear oil gallery plug to 60 Nm (44 ft. lbs.).
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 reused.
12. Lubricate the O-ring seal with clean engine oil.
13. Install the block rear oil gallery plug into the oil gallery bore 0.8-1.4 mm (0.0315-0.055 inch) below flush.
NOTE: The engine block front oil gallery plug should not be removed unless service is required.
14. 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 (0.0086-0.0110 inch) below flush. Do not install the plug more than the recommended depth.
15. Apply sealant GM P/N 12346004 or equivalent to the threads of the oil pressure sensor.
16. Use the J 41712 or equivalent in order to install the oil pressure sensor (if required). Tighten the oil pressure sensor to 20 Nm (15 ft. lbs.).