Sierra Classic 3500 4WD V8-8.1L (2007)
1. Apply sealant to the valve rocker arm stud-to-cylinder head threads. Refer to Sealers, Adhesives, and Lubricants for the correct part number.
Notice: Refer to Fastener Notice in Service Precautions.
2. Install the pushrod guides and valve rocker arm studs.
Tighten the studs to 50 Nm (37 ft. lbs.).
3. Important: The exhaust valve pushrods (2) are longer than the intake valve pushrods (1).
Install the valve pushrods.
4. Coat the valve rocker arm and valve rocker arm ball bearing surfaces with lubricant. Refer to Sealers, Adhesives, and Lubricants for the correct
part number.
5. Install the valve rocker arms, the valve rocker arm balls, and the valve rocker arm nuts.
Tighten the nuts slowly to 35 Nm (26 ft. lbs.) while guiding the tips of the rocker arms over the tips of the valves.
6. Install the valve rocker arm cover.
