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Home >> GMC >> 2021 >> Yukon XL AT4 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions (10 Of 12) >> Repair Instructions >> Valve Rocker Arm Cover Replacement - Left Side (L84) >> Removal Procedure

Removal Procedure

  1. GM5527888Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Positive Crankcase Ventilation Tube Connector (1) @ Positive Crankcase Ventilation Fitting - Disconnect - Plastic Collar Quick Connect Fitting Service

  2. Positive Crankcase Ventilation Tube Connector (2) @ Intake Manifold - Disconnect - Plastic Collar Quick Connect Fitting Service
  3. Positive Crankcase Ventilation Foul Air Tube (3) - Remove
  4. GM5536408Courtesy of GENERAL MOTORS COMPANY

    Grasp the valve rocker arm cover insulator (3) and lift up disengaging the 3 upper intake manifold sight shield grommets (2) from the 3 valve rocker arm cover insulator retainers (1).

  5. Valve Rocker Arm Cover Insulator (3) - Remove
  6. Inspect the 3 upper intake manifold sight shield grommets (2) on the valve rocker arm cover insulator and replace as necessary.
  7. Engine Wiring Harness - Reposition
  8. GM5549185Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Pull only on the spark plug wire boot to remove the wire.
    • Inspect the spark plug wire for damage and replace if necessary.

    Twist the 4 spark plug wire boots a 1/2 turn and remove the 4 spark plug wires (1) from the 4 ignition coils (2).

  9. Engine Wiring Harness Connector @ Ignition Coil - Disconnect [ 4x ]
  10. GM5549495Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe Bolt (1) @ Fuel Feed Pipe (2) - Remove

  11. Fuel Feed Pipe (2) - Reposition
  12. GM5549496Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Bolt (1) - Loosen until disengaged [ 9x ]

  13. Valve Rocker Arm Cover- Left Side (2) - Remove
  14. GM5549498Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Gasket (2) @ Valve Rocker Arm Cover (1) - Remove and DISCARD

  15. GM5536366Courtesy of GENERAL MOTORS COMPANY

    Rotate the oil filler tube (1) counterclockwise and remove from the valve rocker arm cover.

  16. GM5536367Courtesy of GENERAL MOTORS COMPANY

    Inspect the oil filler tube seal (2) on the oil filler tube (1) and replace as necessary.

  17. GM5549499Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Insulator Retainer (1) - Remove [ 3x ]

  18. GM5549501Courtesy of GENERAL MOTORS COMPANY

    Ignition Coil Bolt (2) - Remove [ 8x ]

  19. Ignition Coil (3) @ Valve Rocker Arm Cover (1) - Remove [ 4x ]