Cylinder Head Installation

Special Tools 

EN-45059  Angle Meter

Equivalent regional tools:Special Tools .

1. Clean the sealing surfaces.
2. Inspect the flatness of cylinder head and the engine block sealing surfaces.
   NOTE: Ensure that the cylinder head and the cylinder block sealing surfaces are clear of oil, grease and old gasket material.
3. Apply 2 sealants (2), approximately 4 mm (0.16 in) thick, to the engine block (1). - Adhesives, Fluids, Lubricants and Sealers .
   Fig 1: Sealing Compound Application Points

   Courtesy of GENERAL MOTORS COMPANY
   NOTE: The installation procedure of the cylinder head must be fitted within 10 minutes of applying the sealing compound. DO NOT coat sealing compound into the engine block bores and threads.
4. Cylinder Head Gasket (1) - Install a NEW gasket.
   Fig 2: Cylinder Head Gasket

   Courtesy of GENERAL MOTORS COMPANY
5. Apply 2 additional sealers (2), approximately 4 mm (0.16 in) thick, to the cylinder head gasket (1). - Adhesives, Fluids, Lubricants and Sealers .
6. Cylinder Head (2) - Install
   Fig 3: Cylinder Head

   Courtesy of GENERAL MOTORS COMPANY
7. Cylinder Head Bolt (1) - Install [10x] - Do NOT tighten.
8. Tighten the 10 cylinder head bolts (1) in the sequence as shown, in five passes:
   Fig 4: Cylinder Head Bolt Tightening Sequence

   Courtesy of GENERAL MOTORS COMPANY
   CAUTION: Refer to Fastener Caution .
   CAUTION: Refer to Torque-to-Yield Fastener Caution .
   1. First pass in sequence to 25 N.m (18 lb ft).
   2. Second pass in sequence to an additional 90 degrees, using the EN-45059  meter.
   3. Third pass in sequence to an additional 90 degrees, using the EN-45059  meter.
   4. Fourth pass in sequence to an additional 90 degrees, using the EN-45059  meter.
   5. Final pass in sequence to an additional 90 degrees, using the EN-45059  meter.