Cylinder Head Installation (LEA, or LUK)

Special Tools 

EN 45059  Angle Meter

For equivalent regional tools, refer to Special Tools 

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

Do not use any sealing material.

1. Install the cylinder head gasket to the block.
2. Install the cylinder head. 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: Identifying Cylinder Head Bolt Tightening Sequence
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Refer to Fastener Caution .

NOTE:

Always use NEW cylinder head bolts.

3. Install the cylinder head bolts.
   1. Tighten the bolts in sequence to 30 N.m (22 lb ft).
   2. Tighten the bolts an additional 155 degrees in sequence using the EN 45059  meter.
Fig 3: Locating Front Cylinder Head Bolts
Courtesy of GENERAL MOTORS COMPANY
4. Install the front cylinder head bolts and tighten in sequence to 35 N.m (26 lb ft).