Replacement, Engine Overhaul

REMOVAL
1. Remove the cylinder head bolts.





2. Remove the cylinder heads.





3. Remove the cylinder head gaskets.

INSTALLATION
- Tools Required
- J 39664 Manifold Cover Set, Or Equivalent

NOTE:
- 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 manufactures 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.

1. Install the head gasket to the block, over the dowel pins.
2. Install the cylinder head.
- Make sure that the gasket surfaces are clean.
- Carefully guide the head into place, over the cylinder head dowel pins.





3. Install the cylinder head bolts.
- Make sure that the bolt threads are clean.
- Apply the thread sealant GM P/N 12345382, or equivalent, to the bolt threads and under the bolt heads.
(1) Tighten all of the cylinder head bolts to 25 Nm (20 ft. lbs.).
(2) In sequence, tighten all of the bolts to 75 Nm (55 ft. lbs.) plus additional 90-100° (1/4 plus turn).
4. Install the manifold cover set to the intake ports.