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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 >> Timing Chain Upper Cover Replacement >> Installation Procedure

Installation Procedure

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  1. GM5138713Courtesy of GENERAL MOTORS COMPANY

    Clean the camshaft housing gasket surface on the cylinder head.

  2. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
    3. NOTE:
    • Observe the locations for additional sealer while applying the sealant path.
    • The bolts must be installed and fastened to final torque specification immediately after the component is installed.
  3. 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.
  4. GM5138708Courtesy of GENERAL MOTORS COMPANY

    Engine Front Cover Locating Pin (2) @Cylinder Head - Install [2x]

  5. Timing Chain Upper Cover (1) @Cylinder Head - Install
    6. NOTE:

    Take note that there are different bolt lengths.

  6. Apply sealant to the front threads of the 2 timing chain cover bolts (4).
  7. Timing Chain Cover Bolt (4) - Install and hand tighten [2x]
  8. Timing Chain Cover Bolt (3) - Install and hand tighten [4x]
    9. CAUTION:

    Refer to Fastener Caution .

  9. Timing Chain Cover Bolt (3, 4) - Tighten in sequence [6x] - Fastener Specifications .
  10. Clean the squeezed out sealant residues between the timing chain upper cover and the cylinder head.
  11. GM5138527Courtesy of GENERAL MOTORS COMPANY

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

  12. Camshaft Housing Cover Insulator (3) - Install NEW [26x]
  13. 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

  14. GM5239647Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing (1) @Cylinder Head - Install

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

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

  17. GM5136702Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Oil Return Pipe Gasket (5) - Install NEW

  18. Turbocharger Oil Return Pipe Gasket (6) - Install NEW
  19. Turbocharger Gasket (3) - Install NEW
  20. Turbocharger Assembly (1) - Install
  21. Turbocharger Nut (2, 4) - Install NEW [3x]
  22. Turbocharger Oil Return Pipe Bolt (8) - Install and tighten [2x] - Fastener Specifications
  23. Turbocharger Oil Return Pipe Bolt (7) - Install and tighten [2x] - Fastener Specifications
  24. Lower Crankcase Extension Bolt (9) Install and tighten - Fastener Specifications
  25. Turbocharger Nut (2, 4) - Tighten [3x] - Fastener Specifications
  26. GM5203915Courtesy of GENERAL MOTORS COMPANY

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

  27. GM5135103Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Hose (2) - Install

  28. Positive Crankcase Ventilation Hose Clamp (1) - Engage [2x] - Hose Clamp Replacement Guidelines - Spring Type
  29. 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.

  30. 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).

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

    Note the mounting position of the fuel injector bracket.

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

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

    Fuel Injection Fuel Return Pipe (1) - Install

  36. GM5621181Courtesy of GENERAL MOTORS COMPANY

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

  37. Retainer (3) - Install
  38. GM5159300Courtesy of GENERAL MOTORS COMPANY

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

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

    Install the 6 NEW high pressure diesel fuel feed to injector pipes (2).

  41. Hand tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel rail.
  42. Hand tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel injectors.
  43. Tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel rail. Fastener Specifications
  44. Tighten the 6 high pressure diesel fuel feed to injector pipe fittings (1) at the fuel injectors. Fastener Specifications
  45. GM5158555Courtesy of GENERAL MOTORS COMPANY

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

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

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

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

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

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

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

  52. 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.

  53. 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
  54. GM5154341Courtesy of GENERAL MOTORS COMPANY

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

  55. 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

  56. GM5207474Courtesy of GENERAL MOTORS COMPANY

    Install the EN-52474  Engine Lift Bracket Set.

  57. Using a suitable engine lifting device, remove the engine from the engine stand.
  58. Remove the EN-52449  Engine Stand Adapter (2) from the engine.
  59. Engine Assembly - 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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