NOTE:
Identify each part as it is removed so that each item can be reinstalled in its original location.
Inspect the rocker arm shaft and the rocker arms.
If reused, the rocker arms must be installed in the their original locations.
Remove the rocker shaft bolt before removing the rocker shaft from the rocker shaft holder bridge.
Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to any contact points, the bearing surfaces, and lost motions.
When replacing the rocker arm assembly, remove the fastening hardware from the new rocker arm assembly.

Secondary HO2S Replacement
Special Tools Required
O2 Sensor Wrench Snap-on S6176 or equivalent, commercially available
Disconnect the secondary HO2S connector (A).
Raise the vehicle on a lift.
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Output Shaft (Countershaft) Speed Sensor Replacement (M/T)
M/T
Raise the vehicle on a lift.
Disconnect the output shaft (countershaft) speed sensor connector (A).
Remove the output shaft (countershaft) speed sensor (B).
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Visual Index
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