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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Mechanical - 3.0L (Lm2) Diesel - Repair Instructions (4 Of 11)) >> Repair Instructions >> Intake Camshaft Replacement >> Installation Procedure

Installation Procedure

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  1. GM5148177Courtesy of GENERAL MOTORS COMPANY

    Coat the intake camshaft with engine oil. Adhesives, Fluids, Lubricants, and Sealers

  2. Intake Camshaft (4) - Install
  3. NOTE:

    Observe the markings on the bearing caps. Each bearing cap has an identification number. Ensure that the identification number in the bearing caps is in line with the corresponding identification number on the ladder frame.

  4. Lubricate the 6 camshaft bearing caps (2) and the camshaft bearing rear cap (1) with engine oil.
  5. Camshaft Bearing Rear Cap (1) - Install
  6. Camshaft Bearing Cap (2) - Install [6x]
  7. GM5867315Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Camshaft Bearing Cap Bolt (1) @Intake Camshaft - Install and tighten in sequence [16x] - Fastener Specifications

  8. GM5147734Courtesy of GENERAL MOTORS COMPANY

    Install the EN-52445-1  Camshaft Tool (3) to the camshaft housing.

  9. Check that the tab (1) of the EN-52445-1  Camshaft Tool sits correctly under the camshaft bearing rear cap (2).
  10. Check that the pins (6) of the EN-52445-1  Camshaft Tool sit correctly in the camshafts (5).
  11. GM5147723Courtesy of GENERAL MOTORS COMPANY

    Install the EN-52445-2  Camshaft Tool (1) on the camshafts.

  12. GM5147729Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing Gasket (4) - Install NEW

  13. Camshaft Housing Gasket (3) - Install NEW [5x]
  14. Camshaft Housing (1) - Install
  15. GM6049696Courtesy of GENERAL MOTORS COMPANY

    Hand tighten the 6 bolts (1) of the EN-52445-1  Camshaft Tool 1/2 turn in sequence, until the is flush with the cylinder head.

  16. GM5870220Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing Bolt (1) - Install and hand tighten [16x]

  17. Camshaft Housing Bolt (1) - Tighten in sequence - Fastener Specifications
  18. GM5146206Courtesy of GENERAL MOTORS COMPANY

    Camshaft Sprocket (2) - Install

  19. NOTE:

    Final torque for camshaft sprockets is completed after secondary timing chain and exhaust camshaft sprocket is installed.

  20. Camshaft Sprocket Bolt (1) - Install NEW and hand tighten
  21. GM5146080Courtesy of GENERAL MOTORS COMPANY

    Secondary Timing Chain (1) - Install

  22. Ensure that the timing chain slack is on the secondary timing chain tensioner side.
  23. GM5147541Courtesy of GENERAL MOTORS COMPANY

    Camshaft Sprocket (2) - Install

  24. Camshaft Position Sensor Exciter Wheel (1) - Install
  25. Camshaft Sprocket Bolt (3) - Install NEW and hand tighten
  26. GM5147521Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Check that the nose of the EN-52445-3  Camshaft Tool sits correct in the gap (2) of the camshaft position sensor exciter wheel (3).

    Install the EN-52445-3  Camshaft Tool (1) to both camshafts.

  27. GM5146036Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Tensioner Gasket (1) - Install NEW

  28. Timing Chain Tensioner (2) - Install and tighten - Fastener Specifications
  29. GM5147524Courtesy of GENERAL MOTORS COMPANY

    Camshaft Sprocket Bolt (1) - Tighten [2x] - Fastener Specifications

  30. GM5237886Courtesy of GENERAL MOTORS COMPANY

    Remove the EN-52234  Timing Chain Tensioner Retaining Pin (2).

  31. GM5146037Courtesy of GENERAL MOTORS COMPANY

    Remove the EN-52445-3  Camshaft Tool Holder (2).

  32. Remove the EN-52445-2  Camshaft Tool Holder (3).
  33. GM5147728Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 J-43301  Coil Pack Pullers (1).

  34. GM5147734Courtesy of GENERAL MOTORS COMPANY

    Remove the EN-52445-1  Camshaft Tool (3) from the camshaft housing.

  35. GM5214756Courtesy of GENERAL MOTORS COMPANY

    EN-52586  Crankshaft Fixing Pin (4) - Remove

  36. Rotate the engine by hand to ensure there is no interference.
  37. Crankshaft Pulley Bolt (1) - Remove [4x]
  38. GM5148269Courtesy of GENERAL MOTORS COMPANY

    Clean all sealing surfaces.

  39. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
  40. Apply a bead of sealant (1) to the crankshaft front oil seal sealing surface using the following procedure: Adhesives, Fluids, Lubricants, and Sealers
    1. Begin applying a 4.0 mm (0.158 in) bead, dimension a.
    2. Continue to apply the bead, increasing to a 6.0 mm (0.236 in) bead, dimension b.
    3. Continue to apply the bead, decreasing to a 4.0 mm (0.158 in) bead, dimension a.
    4. At the end of the bead path, increase to a 6.0 mm (0.236 in) bead, dimension a.
  41. GM5148273Courtesy of GENERAL MOTORS COMPANY

    Install the EN-52452  Front Crankshaft Seal Installer (1) to the crankshaft.

  42. Install and hand tighten the 2 bolts (2) of the EN-52452  Front Crankshaft Seal Installer (1).
  43. GM5148276Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Front Oil Seal (1) - Install NEW

  44. Check that the crankshaft front oil seal (1) sits correctly on the crankshaft and the 2 pins (2, 4).
  45. Remove the 2 bolts (5) from the EN-52452  Front Crankshaft Seal Installer (3).
  46. Remove the EN-52452  Front Crankshaft Seal Installer (3) from the crankshaft.
  47. GM5190250Courtesy of GENERAL MOTORS COMPANY

    Engine Front Cover Bolt (1) - Install and tighten in sequence [8x] - Fastener Specifications

  48. GM5137111Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Pulley (1) - Install

  49. Crankshaft Pulley Bolt (2) - Install and hand tighten [4x]
  50. GM5137110Courtesy of GENERAL MOTORS COMPANY

    Install the EN-49979  Crankshaft Holder (1) with EN-956-1  Extension (3).

  51. Crankshaft Pulley Bolt (2) - Tighten [4x] - Fastener Specifications
  52. GM5138713Courtesy of GENERAL MOTORS COMPANY

    Clean the camshaft housing gasket surface on the cylinder head.

  53. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
  54. Apply a bead of sealant (1) to the timing chain upper cover sealing surface using the following procedure: Adhesives, Fluids, Lubricants, and Sealers
    1. Begin applying a 6.0 mm (0.236 in) bead, dimension a.
    2. Continue to apply the bead, decreasing to a 4.0 mm (0.158 in) bead, dimension b, for the remaining bead path, until near the end.
    3. At the end of the bead path, increase to a 6.0 mm (0.236 in) bead, dimension a.
  55. GM5138708Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Upper Cover (1) @Cylinder Head - Install

  56. NOTE:

    Take note that there are different bolt lengths.

  57. Apply sealant to the front threads of the 2 timing chain cover bolts (4).
  58. Timing Chain Cover Bolt (4) - Install and hand tighten [2x]
  59. Timing Chain Cover Bolt (3) - Install and hand tighten [4x]
  60. Timing Chain Cover Bolt (3, 4) - Tighten in sequence [6x] - Fastener Specifications
  61. Clean the squeezed out sealant residues between the timing chain upper cover and the cylinder head.
  62. GM5138527Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing Gasket (2) @Camshaft Housing - Install NEW [2x]

  63. Camshaft Housing Cover Insulator (3) - Install NEW [26x]
  64. GM5247644Courtesy of GENERAL MOTORS COMPANY

    Apply a 6.0 mm (0.236 in) bead of sealant (1) to the camshaft housing sealing locations where the timing chain upper cover joins the cylinder head. Adhesives, Fluids, Lubricants, and Sealers

  65. GM5239647Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing (1) @Cylinder Head - Install

  66. Camshaft Housing Bolt (2) - Hand tighten [26x]
  67. GM5222242Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing Bolt (1, 2, 3, 4) - Tighten in sequence [26x] - Fastener Specifications

  68. GM5136702Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Oil Return Pipe Gasket (5) - Install NEW

  69. Turbocharger Oil Return Pipe Gasket (6) - Install NEW
  70. Turbocharger Gasket (3) - Install NEW
  71. Turbocharger Assembly (1) - Install
  72. Turbocharger Nut (2, 4) - Install NEW [3x]
  73. Turbocharger Oil Return Pipe Bolt (8) - Install and tighten [2x] - Fastener Specifications
  74. Turbocharger Oil Return Pipe Bolt (7) - Install and tighten [2x] - Fastener Specifications
  75. Lower Crankcase Extension Bolt (9) Install and tighten - Fastener Specifications
  76. Turbocharger Nut (2, 4) - Tighten [3x] - Fastener Specifications
  77. GM5203915Courtesy of GENERAL MOTORS COMPANY

    Engine Coolant Air Bleed Hose Stud (2) - Install and tighten - Fastener Specifications

  78. GM5135103Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Hose (2) - Install

  79. Positive Crankcase Ventilation Hose Clamp (1) - Engage [2x] - Hose Clamp Replacement Guidelines - Spring Type
  80. GM5145916Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If service part comes with seal protector then use inner seal protector ring to slip the seal lip over the crankshaft snout, instead of EN-52446-2  Seal Protector.

    Install the EN-52446-2  Seal Protector (1) to the crankshaft.

  81. Install the 4 EN-52446-4  Studs (2).
  82. Install the 4 EN-52446-5  Nuts (3) and hand tighten.
  83. GM5145915Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Observe the locations for additional sealer (2) while applying the sealant path.
    • The bolts must be installed and fastened to final torque specification immediately after the component is installed.

    Clean all sealing surfaces.

  84. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
  85. Apply a 4.0 mm (0.158 in) bead of sealer along the timing chain lower cover sealing path (1), dimension a. Increase the bead to 6.0 mm (0.236 in) at the two locations (2), dimension b. Adhesives, Fluids, Lubricants, and Sealers
  86. GM5145917Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If service part comes with seal protector then use inner seal protector ring to slip the seal lip over the crankshaft snout, instead of EN-52446-2  Seal Protector.

    Align the timing chain lower cover (1) with the two transmission locating pins (2).

  87. Timing Chain Lower Cover (1) - Install NEW
  88. Check that the crankshaft rear oil seal sits correct on the crankshaft.
  89. Remove the EN-52446-2  Seal Protector (3).
  90. GM5389340Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Cover Bolt (1) - Install and hand tighten

  91. Timing Chain Cover Bolt (2) - Install and hand tighten [15x]
  92. Timing Chain Cover Bolt (1, 2) - Tighten in sequence [16x] - Fastener Specifications
  93. GM5812588Courtesy of GENERAL MOTORS COMPANY

    Using the EN-47909  Injector Bore and Sleeve Cleaning Kit (1) clean the 6 fuel injector bores in the cylinder head as needed.

  94. GM5136923Courtesy of GENERAL MOTORS COMPANY

    Install 6 NEW fuel injector seals (2) and 6 fuel injector washers (3) to the high pressure diesel fuel injectors (1).

  95. Install the 6 high pressure diesel fuel injectors (1) to the cylinder head.
  96. GM5136920Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Note the mounting position of the fuel injector bracket.

    Multiport Fuel Injector Bracket (2) - Install [6x]

  97. Fuel Injector Bolt (1) - Install [6x]
  98. Using the EN-45059-A  Angle Meter, tighten the 6 fuel injector bolts (1). Fastener Specifications
  99. GM5621182Courtesy of GENERAL MOTORS COMPANY

    Fuel Injection Fuel Return Pipe (1) - Install

  100. GM5621181Courtesy of GENERAL MOTORS COMPANY

    Fuel Injection Fuel Return Pipe Locking Spring (4) - Engage [6x]

  101. Retainer (3) - Install
  102. GM5159300Courtesy of GENERAL MOTORS COMPANY

    Connect the fuel injector wiring harness using the 8 fuel injector wiring harness retainers (2).

  103. Connect the 6 high pressure diesel fuel injector electrical connectors (1).
  104. GM5158567Courtesy of GENERAL MOTORS COMPANY

    Install NEW high pressure diesel fuel feed to injector pipes (2).

  105. Hand tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel rail.
  106. Hand tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel injectors.
  107. Tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel rail. Fastener Specifications
  108. Tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel injectors. Fastener Specifications
  109. GM5158555Courtesy of GENERAL MOTORS COMPANY

    Install the fuel injection fuel feed pipe bracket (2).

  110. Install the fuel injection fuel feed pipe bracket bolt (1) and tighten. Fastener Specifications
  111. GM5628961Courtesy of GENERAL MOTORS COMPANY

    Install a NEW high pressure diesel fuel feed to rail pipe (2).

  112. Hand tighten the 2 high pressure diesel fuel feed to rail pipe fittings (1) to the high pressure diesel fuel injection rail.
  113. GM5156855Courtesy of GENERAL MOTORS COMPANY

    Install the 2 high pressure diesel fuel feed to rail pipe bracket bolts (1) and tighten. Fastener Specifications

  114. Attach the fuel injector fuel return pipe retainer (2).
  115. GM5156840Courtesy of GENERAL MOTORS COMPANY

    Install the 2 high pressure diesel fuel feed to rail pipe bracket bolts (1, 2) and tighten. Fastener Specifications

  116. GM5156838Courtesy of GENERAL MOTORS COMPANY

    Hand tighten the 2 high pressure diesel fuel feed to rail pipe fittings (1) to the high pressure diesel fuel pump.

  117. Tighten the high pressure diesel fuel feed to rail pipe fittings to both the high pressure diesel fuel pump and the high pressure diesel fuel injection rail. Fastener Specifications
  118. GM5154341Courtesy of GENERAL MOTORS COMPANY

    Diesel Fuel Separator Bracket Bolt (1) - Install and tighten - Fastener Specifications

  119. GM5135087Courtesy 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 canceling 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.

    Camshaft Housing Cover Insulator (1) - Install

  120. GM5133550Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Flex Plate (1) - Install

  121. 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.
  122. Automatic Transmission Flex Plate Bolt (2) - Install NEW and hand tighten [8x]
  123. 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.

  124. Automatic Transmission Flex Plate Bolt (2) - Tighten in sequence [8x] - Fastener Specifications
  125. GM5137110Courtesy of GENERAL MOTORS COMPANY

    Remove the EN-49979  Holder (1) with EN-956-1  Extension (3).

  126. Install the EN-52474  Engine Lift Bracket Set.
  127. Using a suitable engine lifting device, remove the engine from the engine stand.
  128. GM5207474Courtesy of GENERAL MOTORS COMPANY

    EN-52449  Engine Stand Adapter (2) @Engine Block - Remove

  129. Engine - Install - Engine Removal and Installation (F48 & RC1 - F47) , or Engine Removal and Installation (RWL & RC1 - F47) , or Engine Removal and Installation (F48 & RC1 & F47) , or Engine Removal and Installation (RWL & RC1 & F47) , or Engine Removal and Installation (F48 & WTX & F47) , or Engine Removal and Installation (RWL & WTX & F47) , or Engine Removal and Installation (F48 & WTX - F47) , or Engine Removal and Installation (RWL & WTX - F47)