Engine Block Plug Removal

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

J 41712 Oil Pressure Switch Socket

CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.

Remove the knock sensor retaining bolt (1).
Remove the knock sensor (2).

Fig 1: Identifying Knock Sensor & Retaining Bolt
Courtesy of GENERAL MOTORS CORP.
Remove the engine oil pressure gage sensor using the J 41712 .

Fig 2: Using J 41712
Courtesy of GENERAL MOTORS CORP.
Remove the engine oil pressure sensor fitting.

Fig 3: Removing Engine Oil Pressure Sensor Fitting
Courtesy of GENERAL MOTORS CORP.
Remove the transmission locator dowel straight pins, if required.

Fig 4: Removing Transmission Locator Dowel Straight Pins
Courtesy of GENERAL MOTORS CORP.
Remove the engine block left side oil gallery plug.
Remove the engine block left rear oil gallery plug.
Remove the engine block right rear oil gallery plug.

Fig 5: Removing Oil Gallery Plugs
Courtesy of GENERAL MOTORS CORP.
Remove the expansion cup plug from the camshaft rear bearing hole and discard.

Fig 6: Removing Camshaft Expansion Cup Plug
Courtesy of GENERAL MOTORS CORP.
Remove the expansion cup plug from the balance shaft rear bearing hole and discard.

Fig 7: Removing Balance Shaft Expansion Cup Plug
Courtesy of GENERAL MOTORS CORP.
Remove the crankshaft rear oil seal housing locator spring type S pin, if required.

Fig 8: Removing Crankshaft Rear Oil Seal Housing Locator Spring Type S Pin
Courtesy of GENERAL MOTORS CORP.
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: Removing Front Oil Gallery Plugs/Balls
Courtesy of GENERAL MOTORS CORP.
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: Removing Engine Block Core Hole Plugs
  Courtesy of GENERAL MOTORS CORP.
Remove the oil filter bypass valve and discard.

Fig 11: Removing Oil Filter Bypass Valve
Courtesy of GENERAL MOTORS CORP.