Tools Required

J 41712  Oil Pressure Switch Socket. See Special Tools .

Fig 1: Locating Knock Sensor & Retaining Bolt
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CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
1. Remove the knock sensor retaining bolt (1).
2. Remove the knock sensor (2).
Fig 2: View Of Engine Oil Pressure Gage Sensor
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3. Remove the engine oil pressure gage sensor using the J 41712  . See Special Tools .
Fig 3: Engine Oil Pressure Sensor Fitting
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4. Remove the engine oil pressure sensor fitting.
Fig 4: Identifying Transmission Locator Dowel Straight Pin
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5. Remove the transmission locator dowel straight pins, if required.
Fig 5: Engine Block Oil Gallery Plugs
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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 6: Identifying Camshaft Rear Bearing Hole Expansion Cup Plug
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9. Remove the expansion cup plug from the camshaft rear bearing hole and discard.
Fig 7: Expansion Cup Plug From Balance Shaft Rear Bearing Hole
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10. Remove the expansion cup plug from the balance shaft rear bearing hole and discard.
Fig 8: Locating Crankshaft Rear Oil Seal Housing Locator Spring Type S Pin
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11. Remove the crankshaft rear oil seal housing locator spring type S pin, if required.
Fig 9: Front Of Engine Block Front Oil Gallery Plugs Or Balls
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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 10: Expanded View Of Engine Block Core Hole Plugs
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13. Remove the engine block core hole plugs.
    1. Use a suitable tool in order to drive the engine block core hole plugs into the coolant jacket.
    2. Use a suitable tool in order to pull the engine block core hole plugs from the coolant jacket.
    3. Discard the engine block core hole plugs.
Fig 11: Identifying Oil Filter Bypass Valve
Courtesy of GENERAL MOTORS CORP.
14. Remove the oil filter bypass valve and discard.