Engine Block Plug Removal

Tools Required 

J 41712  Oil Pressure Switch Socket

1. Remove the knock sensor retaining bolt (1).
2. Remove the knock sensor (2).
   Fig 1: Knock Sensor & Retaining Bolt

   Courtesy of GENERAL MOTORS CORP.
3. Remove the engine oil pressure gage sensor using the J 41712  .
   Fig 2: Removing Engine Oil Pressure Gage Sensor Using J 41712

   Courtesy of GENERAL MOTORS CORP.
4. Remove the engine oil pressure sensor fitting.
   Fig 3: Engine Oil Pressure Sensor Fitting

   Courtesy of GENERAL MOTORS CORP.
5. Remove the transmission locator dowel straight pins, if required.
   Fig 4: Transmission Locator Dowel Straight Pins

   Courtesy of GENERAL MOTORS CORP.
6. Remove the engine block left side oil gallery plug.
7. Remove the engine block left rear oil gallery plug.
8. Remove the engine block right rear oil gallery plug.
   Fig 5: Engine Block Gallery Plugs

   Courtesy of GENERAL MOTORS CORP.
9. Remove the expansion cup plug from the camshaft rear bearing hole and discard.
   Fig 6: Camshaft rear Bearing Hold Expansion Cup Plug

   Courtesy of GENERAL MOTORS CORP.
10. Remove the expansion cup plug from the balance shaft rear bearing hole and discard.
    Fig 7: Balance Shaft Rear Bearing Hole Expansion Cup Plug

    Courtesy of GENERAL MOTORS CORP.
11. Remove the crankshaft rear oil seal housing locator spring type S pin, if required.
    Fig 8: Crankshaft Rear Oil Seal Housing Locator Pin

    Courtesy of GENERAL MOTORS CORP.
12. Remove the front oil gallery plugs or balls from the front of the engine block and discard.

    Insert a 3/8 x 26 inch rod into the rear oil gallery holes in order to drive out the front oil gallery plugs or balls.

    Fig 9: Front Oil Gallery Plugs

    Courtesy of GENERAL MOTORS CORP.
13. Remove the engine block core hole plugs.
    1. 13.1. Use a suitable tool in order to drive the engine block core hole plugs into the coolant jacket.
    2. 13.2. Use a suitable tool in order to pull the engine block core hole plugs from the coolant jacket.
    3. 13.3. Discard the engine block core hole plugs.
    Fig 10: Engine Block Core Hole Plug

    Courtesy of GENERAL MOTORS CORP.
14. Remove the oil filter bypass valve and discard.
    Fig 11: Oil Filter Bypass Valve

    Courtesy of GENERAL MOTORS CORP.