Tools Required

Caution: Refer to Safety Glasses Caution in the Preface section.





Notice: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.

Important: 

•	Do not use the cylinder head bolts again. Install NEW cylinder head bolts during assembly.

•	Do not use any type sealant on the cylinder head gasket, unless specified.

•	The cylinder head gaskets must be installed in the proper direction and position.

1. Clean the engine block cylinder head bolt holes, if required.

Thread repair tool J 42385-107 may be used to clean the threads of old threadlocking material.

2. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463), or equivalent, into the hole.
3. Clean the cylinder head bolt holes with compressed air.
4. Check the cylinder head locating pins for proper installation.



5. Inspect the displacement markings (1) on the gasket, for proper usage.




Important: When properly installed, the tab on the right cylinder head gasket will be located right of center or closer to the front of the engine.

6. Install the NEW right cylinder head gasket onto the locating pins.



7. Install the cylinder head onto the locating pins and the gasket.
8. Install the NEW cylinder head bolts.

Notice: Refer to Fastener Notice in the Preface section.




9. Tighten the cylinder head bolts.

Tighten

1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 N·m (22 lb ft).
2. Tighten the M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using the J 45059 .
3. Tighten the M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees using the J 45059 .
4. Tighten the M8 cylinder head bolts (11,12,13,14,15) to 30 N·m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.