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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1618 (Engine Mechanical - 4.3L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Engine Block Plug Removal >> Tools Required

Tools Required

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

J 41712  Oil Pressure Switch Socket

CAUTION: Refer to SAFETY GLASSES CAUTION .
  1. Remove the knock sensor retaining bolt (1).
  2. Remove the knock sensor (2).
    Fig 1: Removing Knock Sensor & Retaining Bolt
    G02106189Courtesy 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
    G02106190Courtesy of GENERAL MOTORS CORP.
  4. Remove the engine oil pressure sensor fitting.
    Fig 3: Removing Engine Oil Pressure Sensor Fitting
    G02106191Courtesy of GENERAL MOTORS CORP.
  5. Remove the transmission locator dowel straight pins, if required.
    Fig 4: Removing Transmission Locator Dowel Straight Pin
    G02106192Courtesy 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 Left Side, Left Rear & Right Rear Oil Gallery Plugs
    G02106193Courtesy of GENERAL MOTORS CORP.
  9. Remove the expansion cup plug from the camshaft rear bearing hole and discard.
    Fig 6: Removing Expansion Cup Plug
    G02106194Courtesy of GENERAL MOTORS CORP.
  10. Remove the expansion cup plug from the balance shaft rear bearing hole and discard.
    Fig 7: Removing Expansion Cup Plug
    G02106195Courtesy of GENERAL MOTORS CORP.
  11. 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
    G02106196Courtesy 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: Removing Front Oil Gallery Plugs Or Balls
    G02106197Courtesy 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: Removing Engine Block Core Hole Plugs
    G02106198Courtesy of GENERAL MOTORS CORP.
  14. Remove the oil filter bypass valve and discard.
    Fig 11: Removing Oil Filter Bypass Valve
    G02106199Courtesy of GENERAL MOTORS CORP.