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Home >> Cadillac >> 2021 >> CT4 V, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (2 Of 6) >> Valve Rocker Arm Replacement >> Installation Procedure

Installation Procedure

  1. GM5020690Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Used valve rocker arms must be returned to the original position on the camshaft. If the camshaft is being replaced, the valve rocker arms actuated by the camshaft must also be replaced.

    Valve Rocker Arm (1) @ Hydraulic Valve Lash Adjuster (2) - Install [16x]

  2. GM5020687Courtesy of GENERAL MOTORS COMPANY

    Install the 8 exhaust valve rocker arms (1) with hydraulic valve lash adjusters (2).

  3. GM5020686Courtesy of GENERAL MOTORS COMPANY

    Install the 8 intake valve rocker arms (1) with hydraulic valve lash adjusters (2).

  4. GM5043852Courtesy of GENERAL MOTORS COMPANY

    Use low VOC brake cleaner to ensure the mating surfaces are clean. Adhesives, Fluids, Lubricants, and Sealers

  5. EN-46109  Guide Pins (2) - Install
  6. GM5517341Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The RTV bead is applied from arrow tip to arrow tip across the sealing surface on each side of the engine.

    NOTE:

    The camshaft carrier must be installed, and the excess RTV squeezed from under the camshaft cover gasket must be wiped off within 8 minutes of the RTV sealant application.

    Apply a 3 mm wide RTV bead 2.5 mm back from the front edge of the cylinder head as shown. Adhesives, Fluids, Lubricants, and Sealers

  7. GM5043852Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover Gasket (1) - Install NEW

  8. GM5022866Courtesy of GENERAL MOTORS COMPANY

    Camshaft Carrier (1) - Install

    NOTE:

    Ensure the EN-52462 - A  Camshaft Tool is installed and camshafts are in the time position.

  9. Rock the camshaft carrier back and fourth to seat the camshaft carrier cover onto the two dowels in the cylinder head sealing surface.
  10. EN-46109  Guide Pins (2) - Remove
  11. GM5004087Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover Bolt (3) - Install and hand tighten [4x]

  12. Camshaft Cover Stud (2) - Install and hand tighten [16x]
  13. Camshaft Cover Stud (1) - Install and hand tighten
    14. CAUTION:

    Refer to Fastener Caution .

  14. Tighten the camshaft carrier fasteners in sequence. Fastener Specifications
  15. Reinstall the 2 EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapters, and the EN-52461  Camshaft Torque Reaction Tool.
  16. GM5156836Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Tube (1) - Install NEW

  17. GM5156644Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Bracket (2) - Install

  18. Engine Wiring Harness Bracket Nut (1) - Install and tighten [2x] - Fastener Specifications
  19. GM5156637Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (2) @ Camshaft Carrier (3) - Connect [6x]

  20. Electrical Connector (1) @ Camshaft Carrier (3) - Connect [6x]
  21. Electrical Connector @ Fuel Pump - Connect
  22. GM5478583Courtesy 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

  23. GM5478561Courtesy of GENERAL MOTORS COMPANY

    Fuel Injection Pump Bracket (3) - Install

  24. Fuel Pump Shield Bolt (2) - Install and tighten [2x] - Fastener Specifications
  25. Fuel Pump Shield Bolt (1) - Install and tighten [2x] - Fastener Specifications
  26. GM5404599Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Intermediate Pipe (2) - Install NEW

  27. Fuel Injection Fuel Feed Pipe Bracket Bolt (1) - Install and tighten - Fastener Specifications
  28. GM5404598Courtesy of GENERAL MOTORS COMPANY

    Nut @ Fuel Feed Intermediate Pipe (1) - Install and hand tighten [2x]

  29. Nut @ Fuel Feed Intermediate Pipe (1) - Tighten [2x] - Fastener Specifications
  30. GM5299894Courtesy of GENERAL MOTORS COMPANY

    Install the camshaft position exhaust actuator (3).

  31. Slide the barrel of the torque reaction tool (2) into the camshaft position exhaust actuator (3) and hold.
    32. NOTE:

    Ensure the torque reaction tool bolt (1) is tight enough that the barrel (2) will not slip.

  32. Tighten the bolt (1) to hold the camshaft position exhaust actuator (3) in place.
  33. Install the camshaft position intake actuator (4).
  34. Slide the barrel of the torque reaction tool (2) into the camshaft position intake actuator (4) and hold.
    35. NOTE:

    Ensure the torque reaction tool bolt (1) is tight enough that the barrel (2) will not slip.

  35. Tighten the bolt (1) to hold the camshaft position intake actuator (4) in place.
  36. GM5257435Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Lubricate under the washer surface.

    Lubricate the NEW camshaft position actuator valve solenoid bolts (1) with clean engine oil where indicated. Adhesives, Fluids, Lubricants, and Sealers

  37. GM5257330Courtesy of GENERAL MOTORS COMPANY

    Install and hand tighten the NEW camshaft position actuator valve solenoid bolts (1).

  38. GM5274568Courtesy of GENERAL MOTORS COMPANY

    EN-52436  Timing Chain Tensioner Retention Tool (1) @ Timing Chain (2) - Remove

  39. GM5257414Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Hold the camshaft position actuator firmly and squarely during camshaft position actuator valve solenoid bolt removal/installation. Failure to do so may result in damage to the inside of the camshaft position actuator.

    NOTE:

    Pressure must be applied towards the engine on the EN-52461  Camshaft Torque Reaction Tool at points (3) prior to and during any time the following two conditions are simultaneously met.

    • The camshaft position actuator valve solenoid bolt is loosened or removed.
    • The EN-52461  Camshaft Torque Reaction Tool bolts (2, 3) are loosened.

    Shift the slack in the timing chain to be taken up by the timing chain tensioner.

    1. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2).
    2. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (1) counter-clockwise 6 N.m (53 lb in), then hold.
    3. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (2) to lock the camshaft position intake actuator securely in place.
    4. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (1).
    5. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (3).
    6. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (4) counter-clockwise 6 N.m (53 lb in), then hold.
    7. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (3) to lock the camshaft position intake actuator securely in place.
    8. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (4).
  40. GM5257299Courtesy of GENERAL MOTORS COMPANY

    Tighten the NEW camshaft position actuator valve solenoid bolts (1). Fastener Specifications

  41. GM5257293Courtesy of GENERAL MOTORS COMPANY

    Loosen the 2 EN-52461  Camshaft Torque Reaction Tool bolts (2) to un-lock the camshaft position actuators.

  42. Disengage the tangs of the EN-52461  Camshaft Torque Reaction Tool (1) from the camshaft position intake and exhaust actuator slots.
  43. GM5257213Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 EN-52461  Camshaft Torque Reaction Tool bolts (3).

  44. EN-52461  Camshaft Torque Reaction Tool (1) @ EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Remove
  45. GM5256386Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter bolts (3).

  46. EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Remove [2x]
  47. Rotate both handles (4) of the EN-52462-A  Camshaft Alignment Tool towards the front of the engine.
  48. GM5256287Courtesy of GENERAL MOTORS COMPANY

    Loosen and disengage the EN-52462-A  Camshaft Alignment Tool bolt (2) from camshaft carrier.

  49. EN-52462-A  Camshaft Alignment Tool (1) - Remove
  50. GM5517321Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover Bolt (1) - Install and tighten - Fastener Specifications

  51. GM5255373Courtesy of GENERAL MOTORS COMPANY

    Clean and apply sealant to the camshaft cover core hole plug (1) [2x]. Adhesives, Fluids, Lubricants, and Sealers

  52. Camshaft Cover Core Hole Plug (1) - Install and tighten [2x] - Fastener Specifications
  53. GM5022287Courtesy of GENERAL MOTORS COMPANY

    Ensure the 2 engine front cover locating pins (1) are in place.

  54. Timing Chain Upper Cover Seal (2) - Install NEW
  55. GM5512168Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure that the sealing surface is clear of oil, grease and old sealant material.

    NOTE:

    Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

    NOTE:

    The timing chain upper cover must be installed within 8 minutes of the RTV sealant application.

    Apply room temperature vulcanizing (RTV) sealant at the seam between the camshaft housing and the cylinder head where indicated.

  56. GM5022287Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Upper Cover (3) - Install

  57. Timing Chain Upper Cover Bolt (4) - Install and hand tighten [9x]
  58. Timing Chain Upper Cover Bolt (5) - Install and hand tighten
  59. Timing Chain Upper Cover Bolt (4, 5) - Tighten in sequence [10x] - Fastener Specifications
  60. GM5020482Courtesy of GENERAL MOTORS COMPANY

    Camshaft Position Actuator Magnet Gasket (3) - Install NEW [2x]

  61. Camshaft Position Actuator Magnet (2) - Install [2x]
  62. Camshaft Position Actuator Magnet Bolt (1) - Install [4x] - Fastener Specifications
  63. GM5512093Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Install

  64. GM5512092Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Tube (4) - Connect - Plastic Collar Quick Connect Fitting Service

  65. Engine Wiring Harness (3) - Reposition
  66. Retainer (2) - Install [5x]
  67. Electrical Connector (1) - Connect [2x]
  68. GM5404490Courtesy of GENERAL MOTORS COMPANY

    Ignition Coil (2) - Install [4x]

  69. Ignition Coil Bolt (1) - Install and tighten [8x] - Fastener Specifications
  70. GM5457786Courtesy of GENERAL MOTORS COMPANY

    Upper Intake Manifold Bracket (2) - Install

  71. Upper Intake Manifold Cover Nut (1) - Install and tighten [2x] - Fastener Specifications
  72. GM5457857Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank Inlet Hose Clip (2) @ Upper Intake Manifold Bracket (3) - Install

  73. Upper Intake Manifold Cover Nut (1) - Install and tighten [2x] - Fastener Specifications
  74. GM5159484Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) @ Upper Intake Manifold Bracket (2) - Install [4x]

  75. GM5457059Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness (2) - Reposition

  76. Electrical Connector (1) - Connect [5x]
  77. GM5129475Courtesy of GENERAL MOTORS COMPANY

    Install the fuel feed pipe (1) from the fuel pump and the fuel feed pipe - underbody. Metal Collar Quick Connect Fitting Service

  78. GM5129466Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe Bolt (1) - Install and tighten - Fastener Specifications

  79. GM5164169Courtesy of GENERAL MOTORS COMPANY

    EN-52476  Flywheel Holding Tool (2) - Remove

  80. GM5417288Courtesy of GENERAL MOTORS COMPANY

    Auxiliary Generator Battery Jumper Cable (2) - Install

  81. Battery Positive Cable Nut (1) @ Starter Solenoid - Install and tighten - Fastener Specifications
  82. Electrical Connector (4) - Connect
  83. Starter (3) - Install
  84. GM5417249Courtesy of GENERAL MOTORS COMPANY

    Starter Bolt (2) - Install and tighten [2x] - Fastener Specifications

  85. Starter Stud (1) - Install and tighten - Fastener Specifications
  86. GM5417233Courtesy of GENERAL MOTORS COMPANY

    Auxiliary Generator Battery Jumper Cable - Install

  87. Auxiliary Generator Battery Jumper Cable Terminal Nut (1) - Install and tighten - Fastener Specifications
  88. Retainer (3) - Engage
  89. GM5396466Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Seal (2) - Install NEW [2x]

  90. Engine Oil Cooler (1) - Install
  91. GM5396459Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Bolt (1) - Install and tighten [4x] - Fastener Specifications

  92. GM5396452Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Coolant Inlet Hose (3) @ Engine Oil Cooler - Install

  93. Engine Oil Cooler Coolant Outlet Hose (2) @ Engine Oil Cooler - Install
  94. Hose Clamp (1) - Engage [2x] - Hose Clamp Replacement Guidelines - Spring Type
  95. Lower the vehicle.
  96. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
    97. WARNING:

    Refer to Diesel/Gasoline Vapors Warning .

    WARNING:

    Refer to Safety Glasses Warning .

  97. Pressurize the fuel system and inspect for leaks.
  98. GM5456829Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the intake manifold cover insulator retainers fully engage the intake manifold cover studs.

    Intake Manifold Cover Insulator (1) - Install

  99. GM5456746Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Bolt (1) - Install and tighten - Fastener Specifications

  100. GM5432174Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover (1) @ Upper Intake Manifold Bracket (2) - Install

  101. GM5432171Courtesy of GENERAL MOTORS COMPANY

    Push down on the front of the intake manifold cover (2).

  102. Intake Manifold Cover Bolt (1) - Install and tighten [2x] - Fastener Specifications
  103. Install the oil fill cap.
  104. Fill the engine oil to the proper level with NEW engine oil. Engine Oil and Oil Filter Replacement
  105. Fill the cooling system. Cooling System Draining and Filling (L3B Static Fill) , or Cooling System Draining and Filling (L3B GE 47716)
  106. Connect the negative battery cable. Battery Negative Cable Disconnection and Connection
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