1999 GM 6.5L V8 – Cylinder Head Installation

Tools Required
J 39664 Manifold Cover Set

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.

1. Install the cylinder heads to the block, over the cylinder head gaskets and the cylinder head dowel pins.

2. Apply the thread sealant GM P/N 12345382, or equivalent, to the bolt threads and under the bolt heads.

Notice : Refer to Fastener Notice in Cautions and Notices.

3. 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 Ib ft).
• In sequence (1-17), tighten all of the bolts to 75 N-m (55 Ib ft).
• In sequence (1-17), retighten all of the bolts to 75 N-m (55 Ib ft).
• In sequence (1-17), tighten all of the bolts an additional 90 degrees-100 degrees (1/4 plus turn).

 

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