Tools Required

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

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: Installation Height For Cylinder Head Locator Dowel Pins
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: Install 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: Install 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: Install Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE .
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: Tightening Sequence For Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.
Install the spark plug wire support and bolts.
Tighten

Tighten only the rear spark plug wire support bolt to 12 N.m (106 lb in).
Remove the front spark plug wire support bolt.
The front spark plug wire support bolt is used to fasten the oil level indicator tube, and will be installed within the oil level indicator tube installation procedure.

Fig 6: Install Spark Plug Wire Support & Bolts
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: Install Spark Plugs
Courtesy of GENERAL MOTORS CORP.