Tools Required

J 36660-A Torque Angle Meter

1. Remove the heater hoses. Refer to Heater Hose Assembly Replacement in Heating, Ventilation, and Air Conditioning.
2. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
3. Remove the engine coolant air bleed pipe. Refer to Coolant Air Bleed Pipe Assembly Replacement in Engine Cooling.
4. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side in Engine Exhaust.



5. Remove the engine wiring harness clip bolt (3) from the right cylinder head.




Important: The cylinder head bolts are NOT reusable.

6. Remove the cylinder head bolts.

Notice: After removal, place the cylinder head on 2 wood blocks in order to prevent damage to the sealing surfaces.

7. Remove the cylinder head.



8. Remove the gasket.
9. Discard the gasket.
10. Discard the cylinder head bolts.
11. Clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection in Engine Mechanical - 5.7 L Unit Repair.

Important: 

Caution: Wear safety glasses in order to avoid eye damage.

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.

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

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

2. Spray cleaner GM P/N 12346139, P/N 12377981, or equivalent into the hole.
3. Clean the cylinder head 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: 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.

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 36660-A .
3. Tighten the M11 cylinder head bolts (1-8) to 90 degrees and the M11 cylinder head bolts (9 and 10) to 50  degrees a final pass in sequence using J 36660-A .
4. Tighten the M8 cylinder head bolts (11-15) 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.




10. Install the engine wiring harness clip bolt (3) to the rear of the right cylinder head.

Tighten
Tighten the engine wiring harness clip bolt to 50 N·m (37 lb ft).

11. Install the exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side in Engine Exhaust.
12. Install the engine coolant air bleed pipe. Refer to Coolant Air Bleed Pipe Assembly Replacement in Engine Cooling.
13. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
14. Install the heater hoses. Refer to Heater Hose Assembly Replacement in Heating, Ventilation, and Air Conditioning.