Cylinder Head Installation - Left

Tools Required 

J 45059  Angle Meter

NOTE: The left and right cylinder head gaskets are not interchangeable. Improper placement of the cylinder head gasket will block coolant and oil passages. Blocked coolant and oil passages will cause severe engine damage.
Fig 1: Identifying Left & Right Cylinder Head Gaskets
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The stamped letter R or L, must face up. R is the right bank, L is the left bank.
1. Install the left cylinder head gasket of the correct grade. The left and right cylinder head gaskets are not interchangeable. Refer to Cylinder Head Gasket Selection .
2. Install the left cylinder head.
   Fig 2: View Of Left Cylinder Head & Gasket

   Courtesy of GENERAL MOTORS CORP.
NOTE: This component uses bolts with a preapplied molybdenum disulfide coating for thread lubrication. Do not remove the coating or use any additional lubricant. Improperly lubricated threads will adversely affect the bolt torque and clamp load. Improper bolt torque and clamp load can lead to engine damage.
NOTE: Refer to FASTENER NOTICE .
Fig 3: Cylinder Head Bolt Installation Sequence
Courtesy of GENERAL MOTORS CORP.
3. Install the NEW M12 cylinder head bolts. Reuse the M8 bolts.

   Tighten the M12 cylinder head bolts in three steps:

   Tighten: 

   1. Tighten the M12 bolts a first pass to 50 N.m (37 lb ft).
   2. Tighten the M12 bolts a second pass to 80 N.m (59 lb ft)
   3. Tighten the M12 bolts a third pass to 60 degrees, using J 45059  .
   4. Tighten the M12 bolts a final pass to 60 degrees, using J 45059  .
   5. Tighten the M8 bolts to 25 N.m (18 lb ft).