Cylinder Head Installation

Special Tools 

EN 45059  Angle Meter

For equivalent regional tools, refer to Special Tools 

Fig 1: Cylinder Head Bolts
Courtesy of GENERAL MOTORS COMPANY
NOTE:

Do not use any sealing material. Ensure that all mating surfaces are clean and free of debris.

1. If necessary, install NEW cylinder head locating pins.
2. Install the cylinder head gasket (3) to the block.
3. Install the cylinder head (2). Ensure the number 1 cylinder is at top dead center (TDC). The key on the crankshaft should be on top in the 12 o'clock position.
Fig 2: Cylinder Head Bolt tightening Sequence
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Refer to Fastener Caution .

CAUTION:

This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

4. Install the NEW cylinder head bolts.
   1. tighten the bolts in sequence to 30 N.m (22 lb ft).
   2. tighten the bolts an additional 190 degrees in sequence using the EN 45059  meter.