78. Cylinder Head Installation - Right
Cylinder Head Installation - Right- Tools Required
- J 36660-A Torque Angle Meter
- J 42385-100 Head/Main Bolt Thread Repair Kit
Caution: Refer to Safety Glasses Caution in Service Precautions.
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 reuse the cylinder head bolts. 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 thread locking material.
2. Spray cleaner GM P/N United States 12346139, GM P/N United States 12377981, GM P/N Canada 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. Install the NEW right cylinder head gasket onto the locating pins.
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, and the words "This Side Up", and the engine displacement will be visible.
6. Inspect the gasket for proper installation.
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 Service Precautions.
9. Tighten the cylinder head bolts.
9.1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 Nm (22 ft. lbs.).
9.2. Tighten the M11 cylinder head bolts (1-10) a second pass in sequence to 90° using the J 36660-A.
9.3. Tighten the M 1 1 cylinder head bolts (1,2,3,4,5,6,7,8) to 90° and the M11 cylinder head bolts (9 and 10) to 50° a final pass in sequence to using the J 36660-A.
9.4. Tighten the M8 cylinder head bolts (11,12,13,14,15) to 30 Nm (22 ft. lbs.). Begin with the center bolt (11) and alternating side-to-side, work outward, tightening all of the bolts.