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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Engine Mechanical - 3.0L (Lm2) Diesel - Repair Instructions (5 Of 11)) >> Repair Instructions >> Secondary Timing Chain Guide Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. GM5239053Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Guide (1) - Install

  2. 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.
    3. CAUTION:

    Refer to Fastener Caution .

  3. Timing Chain Guide Bolt (2) - Install and tighten [2x] - Fastener Specifications
  4. GM5146036Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Tensioner Gasket (1) - Install NEW

    5. CAUTION:

    Refer to Component Fastener Tightening Caution .

  5. Timing Chain Tensioner (2) - Install and tighten - Fastener Specifications
  6. GM5146037Courtesy of GENERAL MOTORS COMPANY

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

  7. GM5147734Courtesy of GENERAL MOTORS COMPANY

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

  8. GM5214756Courtesy of GENERAL MOTORS COMPANY

    EN-52586  Crankshaft Fixing Pin (4) - Remove

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

    Clean all sealing surfaces.

  12. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
  13. 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.
  14. GM5148273Courtesy of GENERAL MOTORS COMPANY

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

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

    Crankshaft Front Oil Seal (1) - Install NEW

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

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

  21. GM5137111Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Pulley (1) - Install

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

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

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

    Clean the camshaft housing gasket surface on the cylinder head.

  26. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
  27. 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.
  28. GM5138708Courtesy of GENERAL MOTORS COMPANY

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

    29. NOTE:

    Take note that there are different bolt lengths.

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

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

  35. Camshaft Housing Cover Insulator (3) - Install NEW [26x]
  36. 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

  37. GM5239647Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing (1) @Cylinder Head - Install

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

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

  40. GM5136702Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Oil Return Pipe Gasket (5) - Install NEW

  41. Turbocharger Oil Return Pipe Gasket (6) - Install NEW
  42. Turbocharger Gasket (3) - Install NEW
  43. Turbocharger Assembly (1) - Install
  44. Turbocharger Nut (2, 4) - Install NEW [3x]
  45. Turbocharger Oil Return Pipe Bolt (8) - Install and tighten [2x] - Fastener Specifications
  46. Turbocharger Oil Return Pipe Bolt (7) - Install and tighten [2x] - Fastener Specifications
  47. Lower Crankcase Extension Bolt (9) Install and tighten - Fastener Specifications
  48. Turbocharger Nut (2, 4) - Tighten [3x] - Fastener Specifications
  49. GM5203915Courtesy of GENERAL MOTORS COMPANY

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

  50. GM5135103Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Hose (2) - Install

  51. Positive Crankcase Ventilation Hose Clamp (1) - Engage [2x] - Hose Clamp Replacement Guidelines - Spring Type
  52. 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.

  53. 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).

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

    Note the mounting position of the fuel injector bracket.

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

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

    Fuel Injection Fuel Return Pipe (1) - Install

  59. GM5621181Courtesy of GENERAL MOTORS COMPANY

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

  60. Retainer (3) - Install
  61. GM5159300Courtesy of GENERAL MOTORS COMPANY

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

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

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

  64. Hand tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel rail.
  65. Hand tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel injectors.
  66. Tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel rail. Fastener Specifications
  67. Tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel injectors. Fastener Specifications
  68. GM5158555Courtesy of GENERAL MOTORS COMPANY

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

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

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

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

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

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

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

  75. 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.

  76. 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
  77. GM5154341Courtesy of GENERAL MOTORS COMPANY

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

  78. 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

  79. GM5137110Courtesy of GENERAL MOTORS COMPANY

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

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

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

  83. 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)
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