Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 9 (ENGINE MECHANICAL - 4.3L UNIT REPAIR)REPAIR INSTRUCTIONSENGINE BLOCK PLUG REMOVAL

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F

Engine Block Plug Removal

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Engine Block Plug Removal

WARNING: This page is about a different variant/trim than selected.

Tools Required

J 41712 Oil Pressure Switch Socket

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

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

Fig 2: Engine Oil Pressure Gage Sensor
Courtesy of GENERAL MOTORS CORP.
Remove the engine oil pressure sensor fitting.

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

Fig 4: 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: Engine Block Oil Gallery Plug
Courtesy of GENERAL MOTORS CORP.
Remove the expansion cup plug from the camshaft rear bearing hole and discard.

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

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

Fig 8: 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: Front Oil Gallery Plugs Or 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: Engine Block Core Hole Plugs
  Courtesy of GENERAL MOTORS CORP.
Remove the oil filter bypass valve and discard.

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