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Home › GMC › 2004 › Jimmy 2D Utility, Part Time, Automatic › Repair and Diagnosis › Engine Mechanical › Engine Mechanical - 4.3L › Repair Instructions › Off-Vehicle Repair instructions › Engine Block Plug Removal

Engine Block Plug Removal

Tools Required 

J 41712  Oil Pressure Switch Socket. See Special Tools and Equipment .

    Fig 1: Locating Knock Sensor & Retaining Bolt
    GM679284Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  1. Remove the knock sensor retaining bolt (1).
  2. Remove the knock sensor (2).
    3. Fig 2: View Of Engine Oil Pressure Gage Sensor
    GM188018Courtesy of GENERAL MOTORS CORP.
  3. Remove the engine oil pressure gage sensor using the J 41712  . See Special Tools and Equipment .
    4. Fig 3: Locating Engine Oil Pressure Sensor Fitting
    GM188020Courtesy of GENERAL MOTORS CORP.
  4. Remove the engine oil pressure sensor fitting.
    5. Fig 4: Locating Transmission Locator Dowel Straight Pins
    GM334350Courtesy of GENERAL MOTORS CORP.
  5. Remove the transmission locator dowel straight pins, if required.
    6. Fig 5: View Of Engine Block Oil Gallery Plugs
    GM5271Courtesy 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.
    9. Fig 6: Locating Expansion Cup Plug For Camshaft Rear Bearing Hole
    GM334364Courtesy of GENERAL MOTORS CORP.
  9. Remove the expansion cup plug from the camshaft rear bearing hole and discard.
    10. Fig 7: Locating Expansion Cup Plug For Balance Shaft Rear Bearing Hole
    GM334366Courtesy of GENERAL MOTORS CORP.
  10. Remove the expansion cup plug from the balance shaft rear bearing hole and discard.
    11. Fig 8: Locating Crankshaft Rear Oil Seal Housing Locator Spring Type S Pin
    GM334323Courtesy of GENERAL MOTORS CORP.
  11. Remove the crankshaft rear oil seal housing locator spring type S pin, if required.
    12. Fig 9: Locating Front Oil Gallery Plugs
    GM5270Courtesy 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.

    13. Fig 10: View Of Engine Block Core Hole Plugs
    GM480550Courtesy of GENERAL MOTORS CORP.
  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.
    14. Fig 11: Locating Oil Filter Bypass Valve
    GM188026Courtesy of GENERAL MOTORS CORP.
  14. Remove the oil filter bypass valve and discard.
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