Cylinder Head Installation - Left

Tools Required 

J 45059  Angle Meter. See Special Tools and Equipment .

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).

Fig 1: Cylinder Head Locator Dowel Pins Proper Installation Position (Left)
Courtesy of GENERAL MOTORS CORP.
3. Clean the cylinder head gasket surfaces on the cylinder head.
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: View Of Cylinder Head Gasket And Alignment Pins - Left
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: Removing/Installing Cylinder Head (Left)
Courtesy of GENERAL MOTORS CORP.
6. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the NEW cylinder head bolts.
7. Install the NEW cylinder head bolts finger tight.
Fig 4: Locating Cylinder Head Bolts (Left)
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 45059  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: Identifying 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: Installing Spark Plug Wire Support & Bolts (Left)
Courtesy of GENERAL MOTORS CORP.
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 (Left)
Courtesy of GENERAL MOTORS CORP.
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
Courtesy of GENERAL MOTORS CORP.
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: View Of Engine Coolant Temperature Sensor
Courtesy of GENERAL MOTORS CORP.