Engine Block Plug Removal (C/K/G/C3500HD)

Tools Required 

J 41712  Oil Pressure Sending Unit Socket

1. Remove the oil pressure switch using J 41712  .
   Fig 1: Oil Pressure Switch

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   Important:  Use care not to damage the camshaft bearings.

2. Remove the camshaft rear bearing hole plug:
   1. 2.1. Obtain a suitable self-threading screw.
   2. 2.2. Drill a hole into the plug.
   3. 2.3. Install the self-threading screw.
   4. 2.4. Pull on the plug until it has left the bore.
   5. 2.5. An alternate method to remove the plug would be to insert a long shaft or bar through the front of the engine and drive the plug from the bore.
   Fig 2: Camshaft Rear Bearing Hole Plug

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3. Remove the left side knock sensor shield bolts.
4. Remove the left side knock sensor shield.
   Fig 3: Left Side Knock Sensor Shield & Bolts

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5. Remove the left side knock sensor.
   Fig 4: Left Side Knock Sensor

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6. Remove the right side knock sensor.
   Fig 5: Right Side Knock Sensor

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7. Remove the engine block oil cooler hose fittings.
   Fig 6: Engine Block Oil Cooler Hose Fitting

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8. Remove the rear oil gallery plugs.
   Fig 7: Rear Oil Gallery Plugs

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9. Remove the front oil gallery plugs.
   Fig 8: Front Oil Gallery Plugs

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10. Remove the left side oil gallery plugs.
    Fig 9: Left Side Oil Gallery Plugs

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11. Remove the top oil gallery plugs.
    Fig 10: Top Oil Gallery Plugs

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12. Remove the engine coolant hole plug.
    Fig 11: Engine Coolant Hole Plug

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13. Remove the engine block heater, if equipped.
    Fig 12: Engine Block Heater

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