Series 50G/60G Troubleshooting – Section 4.11 Valve and Injector Operating Mechanisms

Section 4.11
Valve and Injector Operating Mechanisms

Check the Valve and Injector Operating Mechanisms for problems that could cause Knock as follows:‪

1. Remove upper portion of the rocker cover assembly. Refer to Series 60 Service Manual 6SE483 or Series 50 Service Manual 6SE50.

   Note: For best results, check the Valve and Injector Operating Mechanisms for problems with engine at room temperature.

2. Ensure the Valve and Injector Operating Mechanisms are in good operating condition. Refer to Series 60 Service Manual 6SE483 or Series 50 Service Manual 6SE50.
3. Check the valve lash. Ensure the Intake valve lash is set at 0.28 mm (0.011 in.) and the exhaust valve lash is set at 0.91 mm (0.036 in.). Refer to Series 60 Service Manual 6SE483 or Series 50 Service Manual 6SE50.

   Note: Valve Lash must be measured with engine at room temperature.

   1. If the valves are not set at proper lash values, reset the Intake valves at 0.28 mm (0.011 in.) and the exhaust valves at 0.91 mm (0.036 in.).
   2. If the valves are set at the proper lash values, check the Fuel Composition. Refer to "4.12 Fuel Composition" .
4. If the no longer knocks, troubleshooting is done.