- Coat the valve rocker arm and valve rocker arm ball bearing surfaces with prelube GM P/N 1052367 or equivalent.
- Install the valve pushrods.
- Set the number one cylinder to top dead center (TDC) on the compression stroke.
- Loosely install the following parts:
- Tighten the intake rocker arm bolts on cylinders 1, 2, 5 and 7.
- Tighten the exhaust rocker arm bolts on cylinders 1, 3, 4 and 8.
- Rotate the crankshaft one full turn (360 degrees).
- Tighten the intake rocker arm bolts on cylinders 3, 4, 6 and 8.
- Tighten the exhaust rocker arm bolts on cylinders 2, 5, 6 and 7.
Important: Be sure to keep parts in order. Parts must be put back from where they were removed.
Important: Be sure that the valve pushrods seat in the valve lifter sockets.
Important: The 7.4L engine uses different length intake and exhaust valve pushrods.
The exhaust valve pushrods are longer than the intake valve pushrods.
| 4.1. | The valve pushrod guides |
| 4.2. | The valve rocker arms |
| 4.3. | The valve rocker arm balls |
| 4.4. | The valve rocker arm 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.
Important: It is necessary to follow the following procedure for proper valve train alignment.
Tighten
Tighten the above intake rocker arm bolts to 54 N·m (40 lb ft).
Tighten
Tighten the above intake rocker arm bolts to 54 N·m (40 lb ft).
Tighten
Tighten the above intake rocker arm bolts to 54 N·m (40 lb ft).
Tighten
Tighten the above intake rocker arm bolts to 54 N·m (40 lb ft).
