Cylinder Head Installation - Left

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

J 36660-A Torque Angle Meter

Clean the cylinder head gasket surfaces on the engine block.
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).
Clean the cylinder head gasket surfaces on the cylinder head.

Fig 1: View of Cylinder Head Gasket Surfaces
Courtesy of GENERAL MOTORS CORP.

Important: Do not use any type sealer on the cylinder head gasket, unless specified.
Install the NEW cylinder head gasket in position over the cylinder head locator dowel pins.

Fig 2: Installing Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.
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
Courtesy of GENERAL MOTORS CORP.
Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the cylinder head bolts.
Install the cylinder head bolts finger tight.

Fig 4: Installing Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
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).
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: Cylinder Head Bolts Tightening Sequence
  Courtesy of GENERAL MOTORS CORP.
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 Wire Support
Courtesy of GENERAL MOTORS CORP.
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).
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
  Courtesy of GENERAL MOTORS CORP.
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.
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.
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.
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.