GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 Vibe - AWD 🢒 Engine 🢒 Engine Mechanical - 1.8L (LV6) 🢒 Cylinder Head Replacement

Removal Procedure

    Object Number: 856569 Size: SH
  1. Remove the 2 engine cover fasteners.
  2. Remove the 2 engine cover plastic retainers.
  3. Remove the engine cover (1) from the engine.
  4. Relieve the fuel pressure. Refer to Fuel Pressure Relief in Engine Controls-1.8L (LV6).

    5. Caution: Refer to Battery Disconnect Caution in the Preface section.

  5. Disconnect the negative battery cable.
  6. Remove the right side engine splash shield. Refer to Engine Splash Shield Replacement - Right Side in Body Front End.
  7. Remove the left side engine splash shield. Refer to Engine Splash Shield Replacement - Left Side in Body Front End.
  8. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  9. Drain the engine oil.
  10. Lower the vehicle.

    11. Object Number: 244267 Size: SH
  11. Remove the serpentine drive belt. Refer to Drive Belt Replacement .
  12. Remove the generator. Refer to Generator Replacement in Engine Electrical.

    13. Object Number: 234418 Size: SH
  13. Remove the accelerator cable from the throttle body (1).
  14. Disconnect the evaporative emission (EVAP) canister purge valve electrical connector.
  15. Disconnect the EVAP canister purge valve vacuum hoses.
  16. Disconnect the air cleaner housing vacuum hose.

    17. Object Number: 847992 Size: SH
  17. Disconnect the intake air temperature (IAT) sensor.
  18. Remove the air cleaner hose and cap assembly (1).

    19. Disconnect the throttle position (TP) sensor connector.

  19. Disconnect the idle air control (IAC) Valve connector.
  20. Disconnect the manifold absolute pressure (MAP) sensor connector.
  21. Remove the two coolant bypass hose clamps from the throttle body.
  22. Remove the coolant bypass hoses.

    23. Object Number: 856574 Size: SH
  23. Disconnect the four fuel injector connectors (1).
  24. Remove the radiator inlet hose. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
  25. Remove the following items from the intake manifold:
    26. • The 2 bolts (3, 4)
    • The fuel injector harness
  26. Position the fuel injector harness above the intake manifold.
  27. Remove the intake manifold support bracket bolts and bracket.
  28. Remove the fuel injector harness brackets.
  29. Disconnect the oxygen sensor connector.
  30. Remove the oxygen sensor. Refer to Heated Oxygen Sensor 1 Replacement in Engine Controls-1.8L (LV6).
  31. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    32. Object Number: 236842 Size: SH
  32. Remove the following items from the exhaust pipe at the manifold.
    33. • The two bolts (1, 2)
    • The springs
  33. Remove the exhaust pipe to manifold seal.

    34. Object Number: 234425 Size: SH
  34. On AWD, remove the 1 bolt (1) from the exhaust manifold to the support bracket.

    35. Object Number: 824940 Size: SH
  35. On 2WD, remove the exhaust manifold support bracket bolt.
  36. On all vehicles, lower the vehicle.
  37. Disconnect the two ignition coil connectors.
  38. Remove the ignition coil harness retaining bolts, then position harness aside.
  39. Disconnect the fuel line at the fuel rail.
  40. Remove the injector fuel rail hold down clamp.

    41. Object Number: 621682 Size: SH
  41. Remove the ignition coils (1, 2, 3, 4).
  42. Remove the following items from the cylinder head:
    43. • The 3 bolts
    • The fuel rail
    • The 2 ground wire bolts
    • The ground wires
  43. Remove the heater hose at the cylinder head.
  44. Remove the following items from the cylinder head:
    45. • The one bolt
    • The water bypass pipe
  45. Disconnect the cam sensor electrical connector.
  46. Remove the following items:
    47. • The 1 bolt
    • The camshaft sensor
  47. Disconnect the engine coolant temperature sensor electrical connector.
  48. Disconnect the camshaft position actuator solenoid valve electrical connector.
  49. Remove the bolt and camshaft position actuator solenoid valve and O-ring.
  50. Remove the camshaft position actuator oil filter plug, filter and O-ring.
  51. Remove the two PCV hoses from the cylinder head cover.
  52. Remove the cylinder head cover from the cylinder head. Refer to Cylinder Head Cover Replacement .
  53. Disconnect the power steering oil pressure switch connector.
  54. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    55. Object Number: 236875 Size: SH
  55. Remove the two power steering pump through bolts and nuts (1).
  56. Remove the power steering pump.
  57. Position the power steering pump aside.
  58. Remove the crankshaft pulley. Refer to Crankshaft Pulley Replacement .

    59. Object Number: 234378 Size: SH
  59. Disconnect the crankshaft sensor electrical connector, then remove the following items:
    60. • The crankshaft position sensor bolt (5)
    • The crankshaft position sensor
  60. Lower the vehicle.
  61. Set the number 1 piston to top dead center.
  62. Align the camshaft timing sprockets.
  63. Support the engine with a floor jack. Be sure to place a block of wood between the floor jack and the engine.
  64. Remove the drive belt tensioner nut.
  65. Raise the engine, then remove the following items:
    66. • The drive belt tensioner bolt
    • The drive belt tensioner
  66. Remove the following items:
    67. • The 6 right side engine mount bolts
    • The engine mount

    Object Number: 234178 Size: SH
  67. Remove the timing chain tensioner bolts (1, 2).
  68. Remove the timing chain tensioner.
  69. Remove the engine mount bracket as follows:
    70. • Remove the 3 bolts
    • Remove the bracket

    Object Number: 234182 Size: SH
  70. Remove the timing chain cover bolts and nuts (1-15).
  71. Remove the timing chain cover.
  72. Remove the crank sensor reluctor.
  73. Remove the following items:
    74. • The timing chain slipper bolt
    • The slipper

    Object Number: 234188 Size: SH
  74. Remove the following items:
    75. • The crankshaft sprocket
    • The timing chain

    Object Number: 625493 Size: SH
  75. Remove the camshaft sprocket bolts.
  76. Remove the camshaft sprockets.

    77. Object Number: 234080 Size: SH
  77. Remove the following items in sequence:
    78. • The camshaft bearing cap bolts
    • The camshaft bearing caps
  78. Remove the camshafts.
  79. Remove the valve lifters. Keep the lifters in order so that the lifters can be reinstalled in the original location.

    80. Important: Use a wooden block in order to protect the oil pan when lifting the engine.

  80. Use a floor jack in order to raise the engine.
  81. Remove the intake manifold. Refer to Intake Manifold Replacement .
  82. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement in Engine Exhaust.

    83. Object Number: 234516 Size: SH
  83. Remove the following items in sequence:
    84. • The cylinder head bolts
    • The cylinder head washers

    Object Number: 234526 Size: SH
  84. Remove the cylinder head.

    85. Object Number: 235541 Size: SH
  85. Remove the cylinder head gasket (1).

    86. Object Number: 234571 Size: SH
  86. Clean the cylinder block mating surfaces.

    87. Object Number: 234792 Size: SH
  87. Clean the cylinder head mating surface.
  88. Clean the timing chain cover mating surface.

Installation Procedure

    Notice: This engine uses special torque to yield head bolts. This design bolt requires a special tightening procedure. Failure to follow the given procedure will cause head gasket failure and possible engine damage.

  1. Clean the threads in the cylinder block.
  2. Install the new cylinder head gasket on the cylinder block.
  3. Install the cylinder head on the cylinder block.

    4. Notice: This bolt is designed to permanently stretch when tightened, and therefore MUST be replaced anytime it is removed. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged.

  4. Install the cylinder head bolts and washers into the cylinder head.

    5. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 235572 Size: SH
  5. Progressively torque the cylinder head bolts using 3 steps in the sequence shown.

    6. 1st Pass
    Tighten the cylinder head bolts to 25 N·m (18 lb ft).

    2nd Pass
    Tighten the cylinder head bolts to 49 N·m (36 lb ft).

    3rd Pass
    After reaching the torque of 49 N·m (36 lb ft). Use a J 36660-A and tighten the cylinder head bolts an additional 90 degrees.

  6. Install the intake manifold. Refer to Intake Manifold Replacement .
  7. Install the exhaust manifold. Refer to Exhaust Manifold Replacement in Engine Exhaust.
  8. Install the intake camshaft. Refer to Intake Camshaft and Valve Lifter Replacement .
  9. Install the exhaust camshaft. Refer to Exhaust Camshaft and Valve Lifter Replacement .
  10. Install the timing chain. Refer to Timing Chain and Sprocket Replacement .
  11. Install the timing chain housing. Refer to Timing Chain Housing Replacement .
  12. Install the crankshaft pulley. Refer to Crankshaft Pulley Replacement .
  13. Install the cylinder head cover. Refer to Cylinder Head Cover Replacement .
  14. Install the engine mount bracket as follows:
    15. • Position the engine mount bracket
    • Install the 3 bolts

    Tighten
    Tighten the bolts to 47 N·m (35 lb ft).

  15. Install the drive belt tensioner. Refer to Drive Belt Tensioner Replacement .
  16. Install the right side engine mount. Refer to Engine Mount Replacement .
  17. Install the crankshaft position sensor. Refer to Crankshaft Position Sensor Replacement in Engine Controls-1.8L (LV6).
  18. Install the power steering pump.

    19. Tighten
    Tighten the power steering pump bolts to 37 N·m (27 lb ft).

  19. Connect the power steering oil pressure switch electrical connector.
  20. Install the engine coolant temperature (ECT) sensor.
  21. Install the camshaft sensor.
  22. Use the 1 bolt in order to secure the camshaft sensor.

    23. Tighten
    Tighten the camshaft sensor bolt to 15 N·m (11 lb ft).

  23. Install the camshaft position actuator O-ring, filter and oil filter.
  24. Install a new O-ring and the camshaft position actuator solenoid.

    25. Tighten
    Tighten the camshaft position actuator solenoid valve bolt to 15 N·m (11 lb ft).

  25. Connect the camshaft position actuator solenoid valve electrical connector.
  26. Connect the engine coolant temperature sensor electrical connector.

    27. Object Number: 235545 Size: SH
  27. Install the water bypass pipe (1) to the cylinder head.
  28. Use the 1 bolt in order to secure the coolant bypass pipe to the cylinder head.

    29. Tighten
    Tighten the coolant bypass pipe to 15 N·m (11 lb ft).

  29. Install the heater hose to the cylinder head.
  30. Install the engine ground wires to the cylinder head.
  31. Use the 2 bolts in order to secure the engine ground wires.

    32. Tighten
    Tighten the ground wire bolts to 15 N·m (11 lb ft).

  32. Install the fuel rail to the cylinder head.
  33. Use the 3 bolts in order to secure the fuel rail.

    34. Tighten
    Tighten the fuel rail bolts to 14 N·m (10 lb ft).

  34. Connect the fuel line to the fuel rail.
  35. Install the heater hose to the cylinder head.

    36. Object Number: 621682 Size: SH
  36. Install the 4 ignition coils (1, 2, 3, 4).
  37. Connect the ignition coil connectors.
  38. Remove the engine support fixture.
  39. Raise and support the vehicle.

    40. Object Number: 234425 Size: SH
  40. On AWD, install the one bolt (1) from the manifold to the support bracket.

    41. Tighten
    Tighten the exhaust support bracket bolt to 35 N·m (26 lb ft).


    Object Number: 824940 Size: SH
  41. On 2WD, install the exhaust manifold support bracket bolt.

    42. Tighten
    Tighten the exhaust support bracket bolt to 50 N·m (37 lb ft).


    Object Number: 236842 Size: SH
  42. Use a new seal in order to install the exhaust pipe to the exhaust manifold.
  43. Use the 2 bolts and two springs (1, 2) in order to secure the exhaust pipe.

    44. Tighten
    Tighten the exhaust pipe flange bolts to 62 N·m (46 lb ft).

  44. Install the left side engine splash shield. Refer to Engine Splash Shield Replacement - Left Side in Body Front End.
  45. Install the right side engine splash shield. Refer to Engine Splash Shield Replacement - Right Side in Body Front End.
  46. Lower the vehicle.
  47. Install the oxygen sensor. Refer to Heated Oxygen Sensor 1 Replacement in Engine Controls-1.8L (LV6).
  48. Install the injector harness brackets.
  49. Connect all of the necessary vacuum hoses.
  50. Install the intake manifold support bracket.
  51. Use the support bracket bolts in order to secure the intake manifold support bracket.

    52. Tighten
    Tighten the intake support bracket bolts to 50 N·m (37 lb ft).

  52. Install the fuel injector harness to the intake manifold.
  53. Use the three bolts in order to secure the fuel injector harness.

    54. Tighten
    Tighten the fuel injector harness bolts to 12 N·m (106 lb in).

  54. Install the radiator inlet hose. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
  55. Connect the 4 fuel injector connectors.
  56. Connect the temperature sensor connector.
  57. Install the 2 coolant bypass hoses to the throttle body.
  58. Use the 2 hose clamps in order to secure the two coolant bypass hoses.
  59. Connect the MAP sensor connector.
  60. Connect the IAC valve connector.
  61. Connect the TP sensor connector.
  62. Install the air cleaner hose and cap assembly.
  63. Connect the IAT sensor connector.
  64. Install the accelerator cable to the throttle body.
  65. Install the generator (1). Refer to Generator Replacement in Engine Electrical.

    66. Object Number: 244267 Size: SH
  66. Install the serpentine drive belt. Refer to Drive Belt Replacement .
  67. Refill the engine oil.
  68. Refill the engine coolant.