5_108.bk Page 230 Thursday, October 4, 2001 11:45 AM
REPAIR INSTRUCTIONS 304
Figure 304 — Head Bolt Torque Sequence Chart
Push Rod Installation
Valve Yoke Installation
INSPECTION
DESCRIPTION
Check the push rods. Replace any push rods that have loose ends, are bent, or show signs of excessive wear.
There are two exhaust valves and two inlet valves for each cylinder. Each rocker arm, in conjunction with the valve yoke, operates both valves together, in a set (exhaust or inlet), per cylinder.
INSTALLATION INSTALLATION
Used push rods have established wear patterns. Push rods being returned to service should be installed in the same position from which they were removed. 1. Apply lubricating oil to spherical end of the push rod and insert it into the lifter opening. Ensure that it has engaged the lifter by lifting it slightly. If the lifter has been properly contacted, some resistance will be felt in the rod as the lifter is raised. 2. Repeat step 1 until all 12 push rods are in position.
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Used yokes have established wear patterns. Yokes being returned to service should be installed in the same position from which they were removed. Refer to Figure 305. 1. Lubricate the yoke guide pins (6) with clean engine oil. 2. Place the valve yokes (2) on the yoke guide pins from which they were removed. Slightly rock the yokes from side to side to be sure they are seated on the valve stems (5).
