Tools Required
J 36660-A Torque Angle Meter
- Install the left cylinder head gasket to the block, over the cylinder head dowel pins.
- Install the left cylinder head to the block, over the cylinder head gasket and the cylinder head dowel pins.
- Apply the thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the bolt threads and under the bolt heads.
- Install the cylinder head bolts using the installation and tightening sequence (1-17).
- In sequence (1-17), tighten all of the cylinder head bolts to 25 N·m (20 lb ft).
- In sequence (1-17), tighten all of the cylinder head bolts to 75 N·m (55 lb ft).
- In sequence (1-17), retighten all of the cylinder head bolts to 75 N·m (55 lb ft).
- Using the J 36660-A , tighten all of the cylinder head bolts in sequence (1-17) an additional 90 degrees-100 degrees, 1/4 plus turn.
Important:
• Make sure that the block gasket surfaces are clean. • The head gasket material is soft. Handle the gasket with care. Ensure
the gasket surface is not creased or dented. • Do not use a sealer on the head gasket. The head gasket is made with
sealant on the gasket surface. Additional sealer may cause leakage or malfunction.
In addition, some sealers may attack the initial sealant on the gasket.
Notice: Do not reuse the cylinder head bolts. NEW cylinder head bolts must be used. The cylinder head bolts are torque-to-yield bolts and cannot be reused once the initial torque is applied. During the initial torque of the cylinder head bolt the cylinder head bolt is stretched to achieve proper clamp load. Proper clamp load will not be achieved if a used cylinder head bolt is torqued again. A stretched cylinder head bolt can also break when torqued. Failure to replace the used cylinder head bolts with NEW cylinder head bolts can lead to improper clamp loads and extensive engine damage.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten
