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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 ( 5 Of 12) >> Repair Instructions >> Valve Lifter Guide Replacement - Left Side (L84) >> Installation Procedure

Installation Procedure

  1. GM5587689Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • When reusing valve lifters (1), ensure the lifters to their original locations.
    • Only replace the valve lifters (1) and valve lifter guides (2) as required.
    • If camshaft replacement is required, the valve lifters (1) must also be replaced.

    Lubricate the valve lifters and valve lifter guides with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers

  2. Install the raised surface of the valve lifter (1) into the notched area of the valve lifter guide (2).
  3. GM5587687Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The notched area of the valve lifter guides (2) align with the locating tab on the engine block.

    Install the valve lifter guide (2) and the valve lifters (3) as an assembly.

  4. CAUTION:

    Refer to Fastener Caution .

  5. Valve Lifter Guide Bolt (1) - Install and tighten - Fastener Specifications
  6. GM5582380Courtesy of GENERAL MOTORS COMPANY

    Cylinder Head Gasket (1) - Install NEW

  7. Cylinder Head (2) - Install
  8. GM5582379Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

    Cylinder Head Bolt M12 x 134 (2) - Install NEW and hand tighten [ 9x ]

  9. Cylinder Head Bolt M12 x 102 (1) - Install NEW and hand tighten
  10. Cylinder Head Bolt (1, 2) - Tighten in sequence [ 10x ] - Fastener Specifications
  11. GM5582297Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness (2) - Install

  12. Engine Wiring Harness Ground Bolt (1) - Install and tighten - Ground Repair
  13. GM5569419Courtesy of GENERAL MOTORS COMPANY

    Lubricate the flange of the 8 valve rocker arm bolts with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers

  14. Lubricate the 8 valve rocker arms and push rods with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers
  15. NOTE:
    • Valve lash is net build. No valve adjustment is required.
    • Ensure the push rods seat properly to the valve lifter sockets.
  16. Valve Push Rod (1) - Install [ 8x ]
  17. GM5569335Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the push rods seat properly to the ends of the valve rocker arms.

    Valve Rocker Arm (1) - Install [ 8x ]

  18. Valve Rocker Arm Pivot Support Bolt (2) - Hand tighten [ 8x ]
  19. Valve Rocker Arm Pivot Support Bolt (2) - Tighten [ 8x ] - Fastener Specifications
  20. GM5549498Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Gasket (2) @ Valve Rocker Arm Cover (1) - Install NEW

  21. GM5549496Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Valve Rocker Arm Cover- Left Side (2) - Install

  22. Valve Rocker Arm Cover Bolt (1) - Hand tighten [ 9x ]
  23. GM5549496Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Bolt (1) - Tighten in sequence [ 9x ] - Fastener Specifications

  24. GM5569057Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe (2) - Reposition

  25. Fuel Feed Pipe Bolt (1) @ Fuel Feed Pipe (2) - Install and tighten - Fastener Specifications
  26. GM5569054Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe (1) - Reposition

  27. Fuel Feed Pipe (1) - Connect - Metal Collar Quick Connect Fitting Service
  28. Engine Wiring Harness Connector @ Ignition Coil - Connect [ 4x ]
  29. Engine Wiring Harness - Reposition
  30. GM5581818Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Bracket Bolt (1) - Install and hand tighten

  31. GM5581817Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Retainer (1) - Install

  32. GM5581814Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Bolt (1) - Install and hand tighten [ 2x ]

  33. Engine Wiring Harness Bolt (1) - Tighten [ 2x ] - Fastener Specifications
  34. GM5581818Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Bracket Bolt (1) - Tighten - Fastener Specifications

  35. GM5567747Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Oil Control Valve Extension Harness (1) @ Valve Rocker Arm Oil Control Valve Harness - Connect

  36. GM5614523Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (1). If the 2 fuel feed intermediate pipe nuts (3) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

    Fuel Feed Intermediate Pipe (1) - Install NEW

    1. Slide the 2 fuel feed intermediate pipe nuts (3) back along fuel feed intermediate pipe (1) to reveal the 2 formed ends (2) of the fuel feed intermediate pipe (1).
    2. Carefully install the 2 formed ends (2) of the fuel feed intermediate pipe (1) into the sockets of the left and right fuel injection fuel rail. Take care not to hit the 2 formed ends (2) of the fuel feed intermediate pipe (1) on the threaded sockets on the fuel injection fuel rails.
    3. Hold the fuel feed intermediate pipe (1) firmly in place and hand tighten the 2 fuel feed intermediate pipe nuts (3).
  37. Fuel Feed Pipe Bolt (4) - Tighten - Fastener Specifications
  38. Fuel Feed Intermediate Pipe Nut (3) - Tighten [ 2x ] - Fastener Specifications
  39. GM5608922Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (1). If the 2 fuel feed intermediate pipe nuts (2) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

    Fuel Feed Intermediate Pipe (1) - Install NEW

    1. Slide the 2 fuel feed intermediate pipe nuts (2) back along fuel feed intermediate pipe (1) to reveal the 2 formed ends (3) of the fuel feed intermediate pipe (1).
    2. Carefully install the 2 formed ends (3) of the fuel feed intermediate pipe (1) into the sockets of the fuel pump (4) and the fuel feed intermediate pipe (5). Take care not to hit the 2 formed ends (3) of the fuel feed intermediate pipe (1) on the threaded sockets of the fuel pump (4) and fuel feed intermediate pipe (5).
    3. Hold the fuel feed intermediate pipe (1) firmly in place and hand tighten the 2 fuel feed intermediate pipe nuts (2).
  40. Fuel Feed Intermediate Pipe Nut (2) - Tighten [ 2x ] - Fastener Specifications
  41. Connect the electrical wiring harness connectors to the fuel rails as needed.
  42. GM5557530Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    The noise cancelling foam component MUST be replaced if it has been exposed to engine fluids. Failure to replace the noise cancelling foam component that has been exposed to engine fluids may result in an engine fire resulting in catastrophic engine damage, and possible injury or death.

    Fuel Pump Insulator (1) - Install

  43. Remove the covers from the cylinder head passages.
  44. GM5541471Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Gasket (1) - Install NEW [ 8x ]

  45. GM5540978Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  46. NOTE:

    The aid of an assistant may be helpful in holding the engine harness up out of the way so the upper intake manifold cover does not get caught against the engine harness.

  47. Position the intake manifold and Intake manifold cover (1) to install harness retainers.
  48. GM5540975Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Install [ 4x ]

  49. Move the intake manifold and intake manifold cover (2) into place.
  50. GM5540977Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Intake Manifold Bolt (1) - Hand tighten [ 10x ]

  51. Intake Manifold Bolt (1) - Tighten in sequence [ 10x ] - Fastener Specifications
  52. GM5540974Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Install [ 3x ]

  53. GM5540973Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Install [ 4x ]

  54. GM5540971Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Connector (4) @ Evaporative Emission Canister Purge Solenoid Valve - Connect

  55. Engine Wiring Harness Connector (3) @ Manifold Absolute Pressure Sensor - Connect
  56. Engine Wiring Harness Retainer (2) @ Intake Manifold Cover - Install [ 2x ]
  57. Engine Wiring Harness Connector (1) @ Throttle Body - Connect
  58. GM5538400Courtesy of GENERAL MOTORS COMPANY

    Evaporative Emission Canister Purge Tube (2) @ Evaporative Emission Canister Purge Solenoid Valve - Install

  59. Evaporative Emission Canister Purge Tube Connector (1) @ Evaporative Emission Canister Purge Solenoid Valve - Engage - Plastic Collar Quick Connect Fitting Service
  60. GM5536408Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Insulator (3) - Install

  61. Install the 3 upper intake manifold sight shield grommets (2) to the 3 valve rocker arm cover insulator retainers (1).
  62. GM5527888Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Foul Air Tube (3) - Install

  63. Positive Crankcase Ventilation Tube Connector (2) @ Intake Manifold - Connect - Plastic Collar Quick Connect Fitting Service
  64. Positive Crankcase Ventilation Tube Connector (1) @ Positive Crankcase Ventilation Fitting - Connect - Plastic Collar Quick Connect Fitting Service
  65. Raise the vehicle.
  66. GM5001105Courtesy of GENERAL MOTORS COMPANY

    Exhaust System Seal- Left Side (1) - Install NEW

  67. GM4992616Courtesy of GENERAL MOTORS COMPANY

    Exhaust Manifold Gasket- Left Side (2) - Install NEW

  68. Exhaust Manifold-Left Side (1) - Install
  69. GM5647175Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  70. Exhaust Manifold Bolt- Left Side (1) - Install NEW and hand tighten [ 5x ]
  71. Exhaust Manifold Bolt- Left Side (1) - Tighten [ 5x ] - Fastener Specifications
  72. GM5647218Courtesy of GENERAL MOTORS COMPANY

    Exhaust Manifold Heat Shield- Left Side (1) - Install

  73. GM5647219Courtesy of GENERAL MOTORS COMPANY

    Through the wheel opening, install and tighten the 3 left side exhaust manifold heat shield bolts (1). Fastener Specifications

  74. GM5639672Courtesy of GENERAL MOTORS COMPANY

    Inspect the inside of the spark plug rubber boots for a thin, even coat of grease. If there is no grease present or additional grease is necessary, apply a thin coating of dielectric grease evenly to the inside of the spark plug rubber boots up to a depth of 15 mm (0.6 in) from the end of the boot. Adhesives, Fluids, Lubricants, and Sealers

  75. Push the 4 boots of the spark plug wires (1) onto the 4 gas engine ignition spark plugs (2) until 2 audible clicks are heard.
  76. GM5002171Courtesy of GENERAL MOTORS COMPANY

    Upper Intermediate Steering Shaft (1) @ Intermediate Steering Shaft - Install

  77. GM5002170Courtesy of GENERAL MOTORS COMPANY

    If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:

    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the component. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  78. CAUTION:

    Refer to Fastener Caution .

  79. Mid Intermediate Steering Shaft Bolt (1) - Install and tighten - Fastener Specifications
  80. GM5584496Courtesy of GENERAL MOTORS COMPANY

    Exhaust Front Pipe Nut- Left Side (1) - Install and hand tighten [ 3x ]

  81. Exhaust Front Pipe Nut- Left Side (1) - Tighten [ 3x ] - Fastener Specifications
  82. GM5508824Courtesy of GENERAL MOTORS COMPANY

    Exhaust Front Pipe Heat Shield (2) - Install

  83. Exhaust Heat Shield Bolt (1) - Install and tighten - Fastener Specifications
  84. GM5525401Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation. Adhesives, Fluids, Lubricants, and Sealers

    Using a suitable tool, install and tighten the heated oxygen sensor (1). Fastener Specifications

  85. Connect the heated oxygen sensor electrical connector.
  86. Front Wheelhouse Liner- Left Side - Install - Front Wheelhouse Liner Replacement
  87. GM5523120Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Position the accessory drive primary belt (4) on the belt idler pulley (2), fan and water pump pulley (3) and generator (1).

  88. GM5115929Courtesy of GENERAL MOTORS COMPANY

    Install the EN-51767-2  Stretchy Belt Installer (1) onto the crankshaft balancer.

  89. GM5115932Courtesy of GENERAL MOTORS COMPANY

    Position the accessory drive primary belt (2) on the crankshaft balancer.

  90. Slowly rotate the crankshaft balancer in a clockwise direction until the accessory drive primary belt (2) fully seats on the crankshaft balancer.
  91. Remove the EN-51767-2  Stretchy Belt Installer (1) from the crankshaft balancer.
  92. GM5115452Courtesy of GENERAL MOTORS COMPANY

    Inspect the accessory drive primary belt (1) for proper installation and alignment.

  93. GM5115454Courtesy of GENERAL MOTORS COMPANY

    Rotate the crankshaft balancer (1) an additional 360 degrees to ensure proper accessory drive primary belt installation.

  94. GM5503547Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Assembly (1) - Install

  95. GM5635557Courtesy of GENERAL MOTORS COMPANY

    Intake Air Duct (2) - Install

  96. Intake Air Duct Retainer (1) - Install
  97. GM5541732Courtesy of GENERAL MOTORS COMPANY

    Intake Air Splash Shield (2) - Install

  98. Intake Air Baffle Retainer (1) - Install [ 9x ]
  99. GM5541781Courtesy of GENERAL MOTORS COMPANY

    Hood Secondary Latch Release Handle (2) - Install

  100. Hood Latch Actuator Bolt (1) - Install and tighten [ 2x ] - Fastener Specifications
  101. GM5503517Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Nut (2) - Install and tighten - Fastener Specifications

  102. Air Cleaner Outlet Duct (1) - Install
  103. GM5503496Courtesy of GENERAL MOTORS COMPANY

    Connect the mass airflow sensor electrical connector (2) and engage all engine wiring harnesses to the air cleaner assembly.

  104. GM5001379Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct (3) - Install

  105. Air Cleaner Outlet Duct Clamp (2) - Tighten [ 2x ] - Fastener Specifications
  106. Positive Crankcase Ventilation Fresh Air Tube (1) - Connect - Plastic Collar Quick Connect Fitting Service
  107. GM5001375Courtesy of GENERAL MOTORS COMPANY

    Install the engine wiring harness to the air cleaner outlet duct bracket.

  108. Air Cleaner Outlet Duct Bracket Bolt (1) - Install and tighten - Fastener Specifications
  109. Engine Oil and Oil Filter - Install NEW - Engine Oil and Oil Filter Replacement
  110. GM5571687Courtesy of GENERAL MOTORS COMPANY

    Plenum Front Panel Outer Reinforcement (1) - Install - Plenum Front Panel Outer Reinforcement Removal and Installation

  111. Fill the cooling system to the proper level. Cooling System Draining and Filling (GE 47716 L84, L87) , or Cooling System Draining and Filling (Static L84, L87) .
  112. Start the engine and check for leaks.