Equinox 2005-2007, Torrent 2006-07

Cylinder Head

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Removal & Installation



Left Side
  1. Drain the engine coolant from the cooling system.
  2.  
  3. Remove the engine left side spark plug wires from the spark plugs.
  4.  
  5. Remove the spark plug wire retainer support bolt and support.

    Click image to see an enlarged view

    Fig. Remove the spark plug wire retainer support bolt (2) and support (1).

  6.  
  7. Remove the engine left side spark plugs.
  8.  
  9. Remove the valve rocker arm cover.
  10.  
  11. Trim valve cover gasket and sealant away from lower intake manifold gasket at the cylinder head to lower intake manifold joints.
  12.  
  13. Remove the valve rocker arm cover gasket.
  14.  
  15. Remove the lower intake manifold.
  16.  
  17. Remove the oil level indicator tube.
  18.  
  19. Remove the battery box.
  20.  
  21. Remove the exhaust crossover pipe nuts.
  22.  
  23. Remove the exhaust crossover pipe.
  24.  
  25. Remove the exhaust manifold studs, if replacement of the stud is necessary.
  26.  
  27. Remove the engine left side exhaust manifold.
  28.  
  29. Remove the cylinder head bolts and discard.
  30.  
  31. Remove the cylinder head.
  32.  
  33. Remove the cylinder head gasket.
    NOTE
    All gasket mating surfaces must remain free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) or equivalent to clean surfaces.

  34.  
  35. Clean the following areas:

    The gasket sealing surfaces on the cylinder head, cylinder block, intake manifold, and exhaust manifold
     
    The cylinder block bolt threads
     

  36.  

To install:

  1. Clean the following areas:

    The gasket sealing surfaces on the cylinder head, cylinder block, intake manifold, and exhaust manifold
     
    The cylinder block bolt threads
     

  2.  
  3. Install the cylinder head gasket.
  4.  
  5. Install the cylinder head.
    NOTE
    This component uses torque-to-yield bolts. When servicing this component do not reuse the bolts, New torque-to-yield bolts must be installed. Reusing used torque-to-yield bolts will not provide proper bolt torque and clamp load. Failure to install NEW torque-to-yield bolts may lead to engine damage.



    Click image to see an enlarged view

    Fig. Cylinder head bolt torque sequence

  6.  
  7. Install the NEW cylinder head bolts. Tighten the bolts as follows:
    1. Tighten the bolts in sequence to 44 ft. lbs. (60 Nm).
    2.  
    3. Turn the bolts in sequence an additional 95 degrees.
    4.  

  8.  
  9. Install the engine left side exhaust manifold.
  10.  
  11. Install any previously removed exhaust manifold studs. Tighten the studs to 18 ft. lbs. (25 Nm).
  12.  
  13. Install the exhaust crossover pipe.
    NOTE
    Maintain approximately 0.25 inches (6.35 mm) between the thermostat housing and the exhaust crossover pipe.

  14.  
  15. Install the exhaust crossover pipe nuts. Tighten the nuts to 18 ft. lbs. (25 Nm).
  16.  
  17. Install the battery box.
  18.  
  19. Install the oil level indicator tube.
  20.  
  21. Install the lower intake manifold.
    NOTE
    All gasket mating surfaces need to be free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) or equivalent to clean surfaces.


    NOTE
    Apply sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent, at the cylinder head to lower intake manifold joint.

  22.  
  23. Apply sealant at the cylinder head to lower intake manifold joints.
  24.  
  25. Install a new gasket to the valve rocker arm cover. Ensure the gasket is properly seated in the groove of the valve rocker arm cover.
  26.  
  27. Install the valve rocker arm cover. Tighten the bolts to 89 inch lbs. (10 Nm).
  28.  
  29. Install the spark plug wire support and bolt. Tighten the bolt to 18 ft. lbs. (25 Nm).
  30.  
  31. Install the engine left side spark plugs.
  32.  
  33. Install the spark plug wire retainer support and bolt. Tighten the bolt to 18 ft. lbs. (25 Nm).
  34.  
  35. Install the engine left side spark plug wires to the spark plugs.
  36.  
  37. Fill the cooling system with engine coolant to the correct level.
  38.  

Right Side
  1. Drain the engine coolant from the cooling system.
  2.  
  3. Remove the engine appearance cover.
  4.  
  5. Remove the air cleaner air intake duct.
  6.  
  7. Remove the Manifold Absolute Pressure (MAP) sensor bolt and bracket.
  8.  
  9. Rotate the MAP sensor out of the way of the heater outlet pipe.
  10.  
  11. Disconnect the evaporative emissions (EVAP) pipe from the EVAP canister purge solenoid.
  12.  
  13. Disconnect the electrical connector from the EVAP canister purge solenoid.
  14.  
  15. Disconnect the exhaust gas recirculation (EGR) valve electrical connector.
  16.  
  17. Release and slide the heater outlet hose clamp away from the heater outlet pipe connection.
  18.  
  19. Disconnect the heater outlet hose from the heater outlet pipe.
  20.  
  21. Release and slide the heater core outlet hose clamp away from the heater outlet pipe connection.
  22.  
  23. Disconnect the heater core outlet hose from the heater outlet pipe.
  24.  
  25. Remove the heater outlet pipe nut securing the heater outlet pipe to the intake manifold.
  26.  
  27. Remove the two nuts and bolt securing the heater outlet pipe to the throttle body.
  28.  
  29. Remove the heater outlet pipe from the engine.

    Click image to see an enlarged view

    Fig. Remove the heater outlet pipe nuts (1,3) and bolt (4) to remove the heater outlet pipe (2) from the engine.

  30.  
  31. Remove the nut securing the hose/pipe retainer to the right cylinder head.
  32.  
  33. Remove the engine coolant temperature sensor.
  34.  
  35. Remove the ignition control module and bracket.
  36.  
  37. Remove the ignition control module bracket studs.
  38.  
  39. Remove the engine right side spark plug wires from the spark plugs.
  40.  
  41. Remove the engine right side spark plugs.
  42.  
  43. Remove the valve rocker arm cover.
  44.  
  45. Trim valve cover gasket and sealant away from lower intake manifold gasket at the cylinder head to lower intake manifold joints.
  46.  
  47. Remove the valve rocker arm cover gasket.
  48.  
  49. Remove the lower intake manifold..
  50.  
  51. Remove the battery box.
  52.  
  53. Remove the exhaust crossover pipe nuts.
  54.  
  55. Remove the exhaust crossover pipe.
  56.  
  57. Remove the exhaust manifold studs, if replacement of the stud is necessary.
  58.  
  59. Remove the engine right side exhaust manifold.
  60.  
  61. Remove the alternator bracket and engine lift bracket.
  62.  
  63. Remove the cylinder head bolts and discard.
  64.  
  65. Remove the cylinder head.
  66.  
  67. Remove the cylinder head gasket.
    NOTE
    All gasket mating surfaces must remain free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) or equivalent to clean surfaces.

  68.  

To install:

  1. Clean the following areas:

    The gasket sealing surfaces on the cylinder head, cylinder block, intake manifold, and exhaust manifold
     
    The cylinder block bolt threads
     

  2.  
  3. Install the cylinder head gasket.
  4.  
  5. Install the cylinder head.
    NOTE
    This component uses torque-to-yield bolts. When servicing this component do not reuse the bolts, New torque-to-yield bolts must be installed. Reusing used torque-to-yield bolts will not provide proper bolt torque and clamp load. Failure to install NEW torque-to-yield bolts may lead to engine damage.

  6.  
  7. Install the NEW cylinder head bolts. Tighten the bolts as follows:
    1. Tighten the bolts in sequence to 44 ft. lbs. (60 Nm).
    2.  
    3. Turn the bolts in sequence an additional 95 degrees.
    4.  

  8.  
  9. Install the alternator bracket and engine lift bracket. Torque to 37 ft. lbs. (50 Nm). Install the engine right side exhaust manifold.
  10.  
  11. Install any previously removed exhaust manifold studs. Tighten the studs to 18 ft. lbs. (25 Nm).
  12.  
  13. Install the exhaust crossover pipe.
    NOTE
    Maintain approximately 0.25 inches (6.35 mm) between the thermostat housing and the exhaust crossover pipe.

  14.  
  15. Install the exhaust crossover pipe nuts. Tighten the nuts to 18 ft. lbs. (25 Nm).
  16.  
  17. Install the battery box.
  18.  
  19. Install the lower intake manifold.
    NOTE
    All gasket mating surfaces need to be free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) or equivalent to clean surfaces.


    NOTE
    Apply sealer GM P/N 12378521 (Canadian P/N 88901148) or equivalent, at the cylinder head to lower intake manifold joint.

  20.  
  21. Apply sealant at the cylinder head to lower intake manifold joints.
  22.  
  23. Install a new gasket to the valve rocker arm cover. Ensure the gasket is properly seated in the groove of the valve rocker arm cover.
  24.  
  25. Install the valve rocker arm cover. Tighten the bolts to 89 inch lbs. (10 Nm).
  26.  
  27. Connect the PCV fresh air pipe to the right valve rocker arm cover.
  28.  
  29. Install the ignition control module bracket with the ignition control module and spark plug wired still attached.
  30.  
  31. Install the alternator bracket. Torque to 37 ft. lbs. (50 Nm).
  32.  
  33. Install the engine left side spark plugs.
  34.  
  35. Install the engine left side spark plug wires to the spark plugs.
  36.  
  37. Install the ignition module bracket studs. Tighten the studs to 18 ft. lbs. (25 Nm).
  38.  
  39. Install the ignition control module and bracket.
  40.  
  41. Install the engine coolant temperature sensor.
  42.  
  43. Install the nut securing the hose/pipe retainer to the right cylinder head. Tighten the nut to 18 ft. lbs. (25 Nm).
  44.  
  45. Install the heater outlet pipe to the engine.
  46.  
  47. Install the heater outlet pipe nut securing the heater outlet pipe to the intake manifold. Tighten the nut to 18 ft. lbs. (25 Nm).
  48.  
  49. Install the heater outlet pipe to the throttle body nuts and bolt. Tighten the nuts and bolt to 89 inch lbs. (10 Nm).
  50.  
  51. Connect the heater core outlet hose to the heater outlet pipe.
  52.  
  53. Position the heater core outlet hose clamp over the heater outlet pipe connection.
  54.  
  55. Connect the heater outlet hose to the heater outlet pipe.
  56.  
  57. Position the heater outlet hose clamp over the heater outlet pipe connection.
  58.  
  59. Connect the electrical connector to the EGR valve.
  60.  
  61. Connect the electrical connector to the EVAP canister purge solenoid.
  62.  
  63. Connect the EVAP pipe to the EVAP canister purge solenoid.
  64.  
  65. Reposition the MAP sensor.
  66.  
  67. Install the MAP sensor bracket and bolt. Tighten the bolt to 89 inch lbs. (10 Nm).
  68.  
  69. Install the air cleaner air intake duct.
  70.  
  71. Install the engine appearance cover.
  72.  
  73. Fill the cooling system with engine coolant to the correct level.
  74.  

 
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