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.
3. Clean the cylinder head gasket surfaces on the cylinder head.
   Fig 1: Left Cylinder Head Locator Dowel Pins Installation Position

   Courtesy of GENERAL MOTORS CORP.

   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: Left Cylinder Head Gasket

   Courtesy of GENERAL MOTORS CORP.
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: Left Cylinder Head

   Courtesy of GENERAL MOTORS CORP.
6. Apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent, to the threads of the cylinder head bolts.
7. Install the cylinder head bolts finger tight.
   Fig 4: Left Cylinder Head Bolts

   Courtesy of GENERAL MOTORS CORP.
   NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
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: Left Cylinder Head Bolt Tightening Sequence

   Courtesy of GENERAL MOTORS CORP.
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: 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: Left Spark Plug

    Courtesy of GENERAL MOTORS CORP.
13. If reusing the engine coolant temperature gage sensor, if applicable, apply sealant GM P/N United States 12346004, GM P/N Canada 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: Engine Coolant Temperature Gage Sensor

    Courtesy of GENERAL MOTORS CORP.
15. If reusing the engine coolant temperature sensor, if applicable, apply sealant GM P/N United States 12346004, GM P/N Canada 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: Engine Coolant Temperature Sensor

    Courtesy of GENERAL MOTORS CORP.