Tools Required

J 36660-A Torque Angle Meter

1. Clean the cylinder head gasket surfaces on the engine block.
2. Inspect the cylinder head locator dowel pins for proper installation.

   The installation height should be 6.3-6.5 mm (0.248-0.256 in) (a).

3. Clean the cylinder head gasket surfaces on the cylinder head.
   Fig 1: Inspect Height Of Cylinder Head Locator Dowel Pins

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   IMPORTANT: Do not use any type sealer on the cylinder head gasket, unless specified.
4. Install the NEW cylinder head gasket in position over the cylinder head locator dowel pins.
   Fig 2: Installing Cylinder Head Gasket

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5. Install the cylinder head onto the engine block.

   Guide the cylinder head carefully into place over the dowel pins and the cylinder head gasket.

   Fig 3: Installing Cylinder Head

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6. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the cylinder head bolts.
7. Install the cylinder head bolts finger tight.
   Fig 4: Installing Cylinder Head Bolts

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   NOTE: Refer to FASTENER NOTICE .
8. Tighten the cylinder head bolts in sequence on the first pass.

   Tighten 

   Tighten the bolts in sequence on the first pass to 30 N.m (22 lb ft).

9. Use the J 36660-A  in order to tighten the cylinder head bolts in sequence on the final pass.

   Tighten 

   • Tighten the long bolts (1, 4, 5, 8, and 9) on the final pass in sequence to 75 degrees.
   • Tighten the medium bolts (12 and 13) on the final pass in sequence to 65 degrees.
   • Tighten the short bolts (2, 3, 6, 7, 10, and 11) on the final pass in sequence to 55 degrees.
   Fig 5: Tightening Sequence For Cylinder Head Bolts

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10. Install the spark plug wire support and bolts.

    Tighten 

    Tighten the spark plug wire support bolts to 12 N.m (106 lb in).

    Fig 6: Installing Spark Plug Wire Support & Bolts

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11. Measure the NEW spark plugs for the proper gap. Adjust the spark plug gap if necessary.

    Specification 

    Spark plug gap to 1.52 mm (0.060 in).

12. Install the spark plugs.

    Tighten 

    • Tighten the spark plugs for a USED cylinder head to 15 N.m (11 lb ft).
    • Tighten the spark plugs for the initial installation of a NEW cylinder head to 30 N.m (22 lb ft).
    Fig 7: Installing Spark Plugs

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13. If reusing the engine coolant temperature gage sensor, if applicable, apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the engine coolant temperature gage sensor.
14. Install the engine coolant temperature gage sensor, if applicable.

    Tighten 

    Tighten the engine coolant temperature gage sensor to 20 N.m (15 lb ft).

    Fig 8: Installing Engine Coolant Temperature Gage Sensor

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15. If reusing the engine coolant temperature sensor, if applicable, apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the engine coolant temperature gage sensor.
16. Install the engine coolant temperature sensor, if applicable.

    Tighten 

    Tighten the engine coolant temperature sensor to 20 N.m (15 lb ft).

    Fig 9: Installing Engine Coolant Temperature Sensor

    Courtesy of GENERAL MOTORS CORP.