BUSHING 6N8442 - Caterpillar

The Electronic Control Module produces high voltage. To prevent personal injury make sure the Electronic Control Module is not powered and do not come in contact with the fuel injector solenoid terminals while the engine is running.
Valve lash is measured between the rocker arm and the bridge for the valves. All of the clearance measurements and the adjustments must be made with the engine stopped. The valves must be fully closed.If the measurement of the valve lash is in the acceptable range, no adjustments are necessary. The range is given in Table 1.
Table 1
Valve Lash Check: Engine Stopped
Valves Acceptable Valve Lash Range
Inlet 0.42 to 0.58 mm (0.017 to 0.023 inch)
Outlet 0.92 to 1.08 mm (0.036 to 0.043 inch) If the measurement is not within this range, adjustment is necessary. Refer to Testing And Adjusting, "Valve Lash and Valve Bridge Adjustment".