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Home >> Chevrolet >> 2023 >> Tahoe SSV >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions (1 Of 11) >> Repair Instructions >> Cylinder Head Replacement - Left Side (L84) >> Installation Procedure

Installation Procedure

  1. GM5571633Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The 4 bank 1 fuel injector seals (1) should be clean and free of debris prior to installation.

    NOTE:

    Do NOT use any type of lubricant when installing the NEW 4 bank 1 fuel injector seals (1) on the fuel injector.

    Fuel Injector Seal (1) - Install NEW [4x]

  2. GM5044586Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT use any type of lubricant when installing NEW seals (2) on the injector.

    Install EN-51955-1  Long Protector (3) onto the fuel injector tip. Place a NEW seal (2) on EN-51955-1  Long Protector.

    1. Using EN-51955-4  Pusher (1), install the seal onto the first recessed area (4) of the fuel injector and remove EN-51955-4  Pusher.
      2. NOTE:

      The EN-51955-5  Sizer is two sided, and either direction will size the seal correctly.

    2. Compress the seal with your fingers, then resize the seal using the EN-51955-5  Sizer (5).
  3. GM5044590Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT use any type of lubricant when installing NEW seals (2) on the injector.

    Install EN-51955-2  Short Protector (3) onto the fuel injector tip. Place a NEW seal (2) on EN-51955-2  Short Protector.

    1. Using EN-51955-4  Pusher (1), install the seal onto the second recessed area (4) of the fuel injector.
      2. NOTE:

      The EN-51955-5  Sizer is two sided, and either direction will size the seal correctly.

    2. Compress the seal with your fingers, then resize the seal using the EN-51955-5  Sizer (5).
    3. Inspect the NEW fuel injector nozzle housing seals on ALL injectors, ensuring the seals are seated correctly. All seals must be fixed tight, and accurately to the fuel injector nozzle, with no overlap, buckling, or corrugation present. Replace any seal that is incorrectly seated on the fuel injector nozzle with a NEW seal.
  4. GM5616772Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The 4 bank 1 fuel injection fuel rail bolts (1) are retained into the fuel injection fuel rail (2). Care should be taken to ensure that the thread locking is installed after the 4 bank 1 fuel injection fuel rail bolts (1) are installed to the bank 1 fuel injection fuel rail (2).

    Install the 4 fuel injection fuel rail bolts (1) to the bank 1 fuel injection fuel rail (2).

  5. Prepare the 4 bank 1 fuel injection fuel rail bolts (1) for installation as follows:
    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.
  6. Install the bank 1 fuel injection fuel rail (2) to the left side cylinder head.
  7. Fuel Injection Fuel Rail Bolt (1) - Hand tighten [4x]
    8. CAUTION:

    Refer to Fastener Caution

  8. Fuel Injection Fuel Rail Bolt (1) - Tighten [4x] - Fastener Specifications
  9. GM5616694Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Component Fastener Tightening Caution

    Gas Engine Ignition Spark Plug (1) - Install and tighten [4x] - Fastener Specifications

  10. GM5616692Courtesy of GENERAL MOTORS COMPANY

    Install the belt idler pulley and belt idler pulley bracket (2) as an assembly.

  11. Belt Idler Pulley Bracket Bolt (1) - Install and hand tighten [3x]
  12. Belt Idler Pulley Bracket Bolt (1) - Tighten [3x] - Fastener Specifications
  13. GM5582380Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Ensure the proper orientation of the gasket using the marks provided on the gasket.
    • Gaskets are stamped with orientation marks. Make sure "FRONT" is visible on the top of the gasket and toward the front of the engine.

    Cylinder Head Gasket (1) - Install NEW

  14. Cylinder Head (2) - Install
  15. 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]

  16. Cylinder Head Bolt- M12 x 102 (1) - Install NEW and hand tighten
  17. GM5582379Courtesy of GENERAL MOTORS COMPANY

    Cylinder Head BoltM12 x 102 (1) - Tighten in sequence - Fastener Specifications

  18. Cylinder Head BoltM12 x 134 (2) - Tighten in sequence [9x] - Fastener Specifications
  19. Reposition the fuel pump and fuel injection fuel rail wiring harness and connect as necessary.
  20. GM5582297Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness (2) - Install

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

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

  23. Lubricate the 8 valve rocker arms and push rods with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers
    24. NOTE:
    • When using the valve train components again, always install the components to the original location and position.
    • Valve lash is net build. No valve adjustment is required.
    • Ensure the push rods seat properly to the valve lifter sockets.
    • The rocker arm bolts are not serviced separately.
    • DO NOT tighten the rocker arm bolts at this time.
  24. Valve Push Rod (1) - Install [8x]
  25. 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]

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

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

  29. GM5549496Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

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

  30. Valve Rocker Arm Cover Bolt (1) - Hand tighten [9x]
  31. GM5569057Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe (2) - Reposition

  32. Fuel Feed Pipe Bolt (1) @Fuel Feed Pipe (2) - Install and hand tighten
  33. GM5569054Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe (1) - Reposition

  34. Fuel Feed Pipe (1) - Connect - Metal Collar Quick Connect Fitting Service
  35. GM5549496Courtesy of GENERAL MOTORS COMPANY

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

  36. GM5569057Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe Bolt (1) @Fuel Feed Pipe (2) - Tighten in sequence - Fastener Specifications

  37. Engine Wiring Harness Connector@Ignition Coil - Connect [4x]
  38. Engine Wiring Harness - Reposition
  39. GM5581818Courtesy of GENERAL MOTORS COMPANY

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

  40. GM5581817Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Retainer (1) - Install

  41. GM5581814Courtesy of GENERAL MOTORS COMPANY

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

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

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

  44. GM5567747Courtesy of GENERAL MOTORS COMPANY

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

  45. 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).
  46. Fuel Feed Pipe Bolt (4) - Tighten - Fastener Specifications
  47. Fuel Feed Intermediate Pipe Nut (3) - Tighten [2x] - Fastener Specifications
  48. 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).
  49. Fuel Feed Intermediate Pipe Nut (2) - Tighten [2x] - Fastener Specifications
  50. Connect fuel injection fuel rail connectors as needed.
  51. 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

  52. Prepare the 10 intake manifold bolts for installation as follows:
    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.
  53. Remove the covers from the cylinder head passages.
  54. GM5541471Courtesy of GENERAL MOTORS COMPANY

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

  55. GM5540978Courtesy of GENERAL MOTORS COMPANY
    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.

    Position the intake manifold and Intake manifold cover (1) to install harness retainers.

  56. GM5540975Courtesy of GENERAL MOTORS COMPANY

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

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

    Some components not shown for graphic clarity.

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

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

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

  61. GM5540973Courtesy of GENERAL MOTORS COMPANY

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

  62. GM5540971Courtesy of GENERAL MOTORS COMPANY

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

  63. Engine Wiring Harness Connector (3) @Manifold Absolute Pressure Sensor - Connect
  64. Engine Wiring Harness Retainer (2) @Intake Manifold Cover - Install [2x]
  65. Engine Wiring Harness Connector (1) @Throttle Body - Connect
  66. GM5538400Courtesy of GENERAL MOTORS COMPANY

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

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

    Valve Rocker Arm Cover Insulator (3) - Install

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

    Positive Crankcase Ventilation Foul Air Tube (3) - Install

  71. Positive Crankcase Ventilation Tube Connector (2) @Intake Manifold - Connect - Plastic Collar Quick Connect Fitting Service
  72. Positive Crankcase Ventilation Tube Connector (1) @Positive Crankcase Ventilation Fitting - Connect - Plastic Collar Quick Connect Fitting Service
  73. Raise and support the vehicle. Lifting and Jacking the Vehicle
  74. GM5001105Courtesy of GENERAL MOTORS COMPANY

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

  75. GM5647178Courtesy of GENERAL MOTORS COMPANY

    Exhaust Manifold Gasket (2) - Install NEW

  76. Exhaust Manifold- Left Side (1) - Install
  77. 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.
  78. Exhaust Manifold Bolt- Left Side (1) - Install NEW and hand tighten [5x]
  79. Exhaust Manifold Bolt- Left Side (1) - Tighten in sequence [5x] - Fastener Specifications
  80. GM5647218Courtesy of GENERAL MOTORS COMPANY

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

  81. GM5647219Courtesy of GENERAL MOTORS COMPANY

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

  82. 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 from the end of the boot. Adhesives, Fluids, Lubricants, and Sealers .

  83. 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.
  84. GM5002171Courtesy of GENERAL MOTORS COMPANY

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

  85. 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.
    86. CAUTION:

    Refer to Fastener Caution .

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

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

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

    Exhaust Front Pipe Heat Shield- Left Side (2) - Install

  90. Exhaust Heat Shield Bolt- Left Side (1) - Install and tighten - Fastener Specifications
  91. 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

    Install and tighten the heated oxygen sensor (1) using a suitable tool. Fastener Specifications

  92. Connect the heated oxygen sensor electrical connector.
  93. Front Wheelhouse Liner- Left Side - Install Front Wheelhouse Liner Replacement
  94. 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).

  95. GM5115929Courtesy of GENERAL MOTORS COMPANY

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

  96. GM5115932Courtesy of GENERAL MOTORS COMPANY

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

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

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

  100. GM5115454Courtesy of GENERAL MOTORS COMPANY

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

  101. GM5503547Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Assembly (1) - Install

  102. GM5503528Courtesy of GENERAL MOTORS COMPANY

    Intake Air Duct Retainer (1) - Install

  103. GM5541732Courtesy of GENERAL MOTORS COMPANY

    Intake Air Splash Shield (2) - Install

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

    Hood Secondary Latch Release Handle (2) - Install

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

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

  108. Air Cleaner Outlet Duct (1) - Install
  109. GM5503496Courtesy of GENERAL MOTORS COMPANY

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

  110. GM5001379Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct (3) - Install

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

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

  114. Air Cleaner Outlet Duct Bracket Bolt (1) - Install and tighten - Fastener Specifications
  115. GM5571687Courtesy of GENERAL MOTORS COMPANY

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

  116. Engine Oil and Oil Filter - Install NEW - Engine Oil and Oil Filter Replacement
  117. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (9C1, 5W4) , or Battery Negative Cable Disconnection and Connection (KL9)
  118. 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)
  119. Start the engine and check for coolant leaks.
  120. Check for oil leaks.
  121. Inspect for fuel leaks.
  122. Inspect the exhaust system for leaks.
  123. Run the windshield wipers for two complete cycles then turn off the windshield wipers.
  124. Ensure the windshield wipers are in the full park position.
  125. Perform the throttle body idle air flow compensation reset. Throttle Body Idle Air Flow Compensation Reset
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