Important:
| • | Make sure that the block gasket surfaces are clean. |
| • | The head gasket material is soft. Handle the gasket with care. Make sure
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. |
- Install the cylinder head gaskets to the block, over the cylinder head dowel
pins.
- Install the cylinder heads to the block, over the cylinder head gaskets
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.
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.
- Install the cylinder head bolts using the installation and tightening sequence
(1-17).
Tighten
| • | 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 bolts to 75 N·m (55 lb ft). |
| • | In sequence (1-17), retighten all of the bolts to 75 N·m
(55 lb ft). |
| • | In sequence (1-17), tighten all of the bolts an additional 90 degrees-100 degrees
(1/4 plus turn). |
