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Home >> Chevrolet >> 2021 >> Tahoe Z71 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions (8 Of 11) >> Repair Instructions >> Engine Replacement >> Removal Procedure

Removal Procedure

  1. GM5587488Courtesy of GENERAL MOTORS COMPANY

    Mount the engine (1) onto the engine stand (2). Engine Removal and Installation (L84, 4WD, with WTX, without F47) , or Engine Removal and Installation (L84, 2WD, with WTX, without F47) , or Engine Removal and Installation (L84, 4WD, with RC1, without F47) , or Engine Removal and Installation (L84, 2WD, with RC1, with F47) Engine Removal and Installation (L84, 4WD, with RC1, with F47) , or Engine Removal and Installation (L84, 4WD, with WTX, with F47) , or Engine Removal and Installation (L84, 2WD, with RC1, without F47) , or Engine Removal and Installation (L84, 2WD, with WTX, with F47) , or Engine Removal and Installation (L87, 2WD, with RC1, with F47) , or Engine Removal and Installation (L87, 4WD, with RC1, with F47) , or Engine Removal and Installation (L87, 2WD, with RC1, without F47) , or Engine Removal and Installation (L87, 4WD, with RC1, without F47) , or Engine Removal and Installation (L87, 2WD, with WTX, with F47) , or Engine Removal and Installation (L87, 4WD, with WTX, with F47) , or Engine Removal and Installation (L87, 2WD, with WTX, without F47) , or Engine Removal and Installation (L87, 4WD, with WTX, without F47)

  2. GM5053741Courtesy of GENERAL MOTORS COMPANY

    Remove EN-36857  Engine Lift Bracket (1) and EN-52059  Engine Support Fixture Adapter Bolt - M10 (2) from the cylinder head.

  3. GM5053735Courtesy of GENERAL MOTORS COMPANY

    Remove EN-36857  Engine Lift Bracket (1) and EN-52059  Engine Support Fixture Adapter Bolt - M10 (2) from the cylinder head.

  4. GM5619108Courtesy of GENERAL MOTORS COMPANY

    EN-42386-A  Flywheel Holding Tool (1) - Install

  5. Install 1 M10-1.5 x 120 mm (3) bolt and 1 M10-1.5 x 45 mm bolt (2).
  6. CAUTION:

    Refer to Fastener Caution .

  7. Tighten the 2 bolts (2, 3) to 50 N.m (37 lb ft).
  8. GM5619300Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Flex Plate Bolt (1) - Remove and DISCARD [8x]

  9. GM5619302Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Flex Plate (1) - Remove

  10. GM5619297Courtesy of GENERAL MOTORS COMPANY

    Remove the M10-1.5 x 120 mm bolt (3) and the M10-1.5 x 45 mm bolt (2).

  11. EN - 42386-A  Flywheel Holding Tool (1) - Remove
  12. GM5619486Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Engine Side Bolt- Left Side (1) - Remove [4x]

  13. Engine Mount- Left Side (2) - Remove
  14. GM5619488Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Engine Side Bolt- Right Side (1) - Remove [4x]

  15. Engine Mount- Right Side (2) - Remove
  16. GM5619235Courtesy of GENERAL MOTORS COMPANY

    Rotate the oil filler tube (1) counterclockwise and remove from the valve rocker arm cover.

  17. GM5536367Courtesy of GENERAL MOTORS COMPANY

    Inspect the oil filler tube seal (2) on the oil filler tube (1) and replace as necessary.

  18. GM5619113Courtesy of GENERAL MOTORS COMPANY

    Belt Idler Pulley Bracket Bolt (1) - Remove [3x]

  19. Remove the belt idler pulley and belt idler pulley bracket (2) as an assembly.
  20. GM5619273Courtesy of GENERAL MOTORS COMPANY

    Grasp the left side valve rocker arm cover insulator (3) and lift up disengaging the 3 upper intake manifold sight shield grommets (2) from the 3 valve rocker arm cover insulator retainers (1).

  21. Valve Rocker Arm Cover Insulator- Left Side (3) - Remove
  22. GM5619274Courtesy of GENERAL MOTORS COMPANY

    Grasp the right side valve rocker arm cover insulator (3) and lift up disengaging the 3 upper intake manifold sight shield grommets (1) from the 3 valve rocker arm cover insulator retainers (2).

  23. Valve Rocker Arm Cover Insulator- Right Side (3) - Remove
  24. GM5541819Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Pull only on the spark plug wire boot to remove the wire.

    NOTE:

    Inspect the spark plug wire for damage and replace if necessary.

    Twist the 4 spark plug wire boots a 1/2 turn and remove the 4 spark plug wires (1) from the 4 gas engine ignition spark plugs (2).

  25. GM5549185Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Pull only on the spark plug wire boot to remove the wire.

    NOTE:

    Inspect the spark plug wire for damage and replace if necessary.

    Twist the 4 spark plug wire boots a 1/2 turn and remove the 4 spark plug wires (1) from the 4 ignition coils (2).

  26. GM5550055Courtesy of GENERAL MOTORS COMPANY

    Disconnect the 4 ignition coil electrical connectors.

  27. Ignition Coil Bolt (1) - Remove [8x]
  28. Ignition Coil- Left Side (2) - Remove [4x]
  29. GM5549243Courtesy of GENERAL MOTORS COMPANY

    Twist the 4 spark plug wire boots a 1/2 turn and remove the 4 spark plug wires (1) from the 4 gas engine ignition spark plugs (2).

  30. GM5549236Courtesy of GENERAL MOTORS COMPANY

    Twist the 4 spark plug wire boots a 1/2 turn and remove the 4 spark plug wires (1) from the 4 ignition coils (2).

  31. GM5550107Courtesy of GENERAL MOTORS COMPANY

    Disconnect the 4 ignition coil electrical connectors.

  32. Ignition Coil Bolt (1) - Remove [8x]
  33. Ignition Coil- Right Side (2) - Remove [4x]
  34. GM5619337Courtesy of GENERAL MOTORS COMPANY

    Exhaust Manifold Heat Shield Bolt (1) - Remove [3x]

  35. Exhaust Manifold Heat Shield - Left Side (2) - Remove
  36. GM5619338Courtesy of GENERAL MOTORS COMPANY

    Exhaust Manifold Bolt (2) - Remove and DISCARD [5x]

  37. Exhaust Manifold- Left Side (3) - Remove
  38. Exhaust Manifold Gasket (1) - Remove and DISCARD
  39. GM5619366Courtesy of GENERAL MOTORS COMPANY

    Oil Level Indicator Tube Bolt (1) - Remove

  40. GM5619368Courtesy of GENERAL MOTORS COMPANY

    Remove the oil level indicator, oil level indicator tube and oil level indicator seal as an assembly (1)

  41. Oil Level Indicator Seal (2) - Remove and DISCARD
  42. GM5619422Courtesy of GENERAL MOTORS COMPANY

    Exhaust Manifold Heat Shield Bolt (1) - Remove [3x]

  43. Exhaust Manifold Heat Shield - Right Side (2) - Remove
  44. GM5619423Courtesy of GENERAL MOTORS COMPANY

    Exhaust Manifold Bolt (2) - Remove and DISCARD [5x]

  45. Exhaust Manifold- Right Side (3) - Remove
  46. Exhaust Manifold Gasket (1) - Remove and DISCARD
  47. GM5568606Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Fuel feed intermediate pipes will be delivered with shipping caps that are meant to protect the mating joint threads. Do NOT remove shipping caps until the pipe is to be installed and joints are to be secured. Failure to do so could result in damage to the mating threads.

    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (2). If the 2 fuel feed intermediate pipe nuts (1) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

    Fuel Feed Intermediate Pipe Nut (1) @Fuel Feed Intermediate Pipe (2) - Loosen until disengaged [2x]

  48. Fuel Feed Intermediate Pipe (2) - Remove and DISCARD
  49. GM5612992Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (3). If the 2 fuel feed intermediate pipe nuts (1) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

    Fuel Feed Intermediate Pipe Nut (1) - Loosen until disengaged [2x]

  50. Fuel Feed Pipe Bolt (2) - Remove
  51. Fuel Feed Intermediate Pipe (3) - Remove and DISCARD
  52. Disconnect and reposition the fuel pump and fuel injector wiring harness as necessary.
  53. GM5568498Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Alternately loosen the fuel pump bolts one turn at a time until the pump is fully disengaged from fuel pump lifter follower. Trying to remove the pump bolts without even side-to-side loosening may result in pump plunger damage

    Fuel Pump Bolt (1) - Remove [2x]

  54. Fuel Pump Cover (2) - Remove
  55. Fuel Pump Bolt Retainer (3) - Remove [2x]
  56. Fuel Pump (4) - Remove
  57. Fuel Pump Bracket Gasket (5) - Remove and DISCARD
  58. Clean the cylinder head around the fuel injectors on bank 1 of any dirt or buildup.
  59. GM5569848Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The 4 bank 1 fuel injection fuel rail bolts (1) are retained in the bank 1 fuel injection fuel rail and may be difficult to remove.

    Remove the 4 bank 1 fuel injection fuel rail bolts (1).

  60. GM5362144Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • In some cases, the fuel injectors may be difficult to remove because of heavy carbon build-up or other factors. If the fuel injectors are difficult to remove, apply solvent to the base of the fuel injector bores, and allow adequate soaking time, to loosen the fuel injectors.
    • The bank 1 fuel injection fuel rail and fuel injectors are removed as an assembly.
    • To prevent material from entering the combustions chambers make sure the area around each fuel injector is clean and free of debris before the fuel injectors are removed from the fuel injector bores.

    Install 2 sets of EN-49248  Injector Rail Assembly Remover (4) on bank 1.

  61. Install one EN-49248  Injector Rail Assembly Remover (4) in each of the 4 bank 1 fuel injection fuel rail bolt bores.
  62. Turn each EN-49248  Injector Rail Assembly Remover (4) an even amount to pull the fuel injection fuel rail bank 1 and fuel injectors out evenly.
  63. CAUTION:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.
  64. Simultaneously lift both ends of the bank 1 fuel injection fuel rail (2) and remove from the left side cylinder head.
  65. GM5571655Courtesy of GENERAL MOTORS COMPANY

    Fuel Injector Nozzle Housing Seal (1) - Remove and DISCARD [8x]

  66. GM5571633Courtesy of GENERAL MOTORS COMPANY

    Fuel Injector Seal (1) - Remove and DISCARD [4x]

  67. Clean the cylinder head around the fuel injectors on bank 2 of any dirt or buildup.
  68. GM5585529Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The bank 2 fuel injection fuel rail bolts are retained in the bank 2 fuel injection fuel rail and may be difficult to remove.

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

  69. GM5362144Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • In some cases, the fuel injectors may be difficult to remove because of heavy carbon build-up or other factors. If the fuel injectors are difficult to remove, apply solvent to the base of the fuel injector bores, and allow adequate soaking time, to loosen the fuel injectors.
    • The bank 2 fuel injection fuel rail and fuel injectors are removed as an assembly.
    • To prevent material from entering the combustions chambers make sure the area around each fuel injector is clean and free of debris before the fuel injectors are removed from the fuel injector bores.

    Install 2 sets of EN-49248  Injector Rail Assembly Remover (4) on bank 2.

  70. Install one EN-49248  Injector Rail Assembly Remover (4) in each of the 4 bank 2 fuel injection fuel rail bolt bores.
  71. Turn each EN-49248  Injector Rail Assembly Remover (4) an even amount to pull the fuel injection fuel rail bank 2 and fuel injectors out evenly.
  72. CAUTION:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.
  73. Simultaneously lift both ends of the bank 2 fuel injection fuel rail (2) and remove from the right side cylinder head.
  74. GM5571655Courtesy of GENERAL MOTORS COMPANY

    Fuel Injector Nozzle Housing Seal (1) - Remove and DISCARD [8x]

  75. GM5571633Courtesy of GENERAL MOTORS COMPANY

    Fuel Injector Seal (1) - Remove and DISCARD [4x]

  76. GM5619658Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Bracket Bolt (1) - Remove [2x]

  77. GM5619659Courtesy of GENERAL MOTORS COMPANY

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

  78. GM5619687Courtesy of GENERAL MOTORS COMPANY

    Knock Sensor Shield Bolt (1) - Remove

  79. Knock Sensor Shield (2) - Remove
  80. GM5619688Courtesy of GENERAL MOTORS COMPANY

    Knock Sensor Bolt (1) - Remove

  81. Knock Sensor- Left Side (2) - Remove
  82. GM5619689Courtesy of GENERAL MOTORS COMPANY

    { If equipped }Engine Coolant Heater (1) - Remove

  83. GM5619710Courtesy of GENERAL MOTORS COMPANY

    Knock Sensor Bolt (1) - Remove

  84. Knock Sensor- Right Side (2) - Remove