The engine should be warmed up before the engine is returned to full operation. Damage to valves and components during operation in very cold temperature conditions can result from engine operation for short intervals. Damage to the engine can occur from starting the engine and stopping the engine many times without allowing the engine to reach normal operating temperature. The fuel and the oil are not completely burned in the combustion chambers while the engine is operating below the normal operating temperature. This fuel and oil causes soft carbon deposits on the valve stems. Generally, these deposits do not cause problems because these deposits are burned off during operation at normal engine temperatures. When the engine is started and the engine is stopped frequently the engine may not reach the normal operating temperature. This will cause the carbon deposits to become thicker. This will prevent the free operation of the valves. This can also cause the following conditions: valves to stick, pushrods to bend and other damage to valve train components. Operate the engine at no load until the coolant temperature is at a minimum temperature of
Make another walk-around inspection. Inspect the engine for fluid leaks and air leaks. The time that is needed for the engine to reach the normal mode of operation is usually less than the time that is needed for a walk-around inspection.
- Ensure that the gauges are in the normal ranges for the engine rpm.
- Increase the engine rpm to rated rpm. Always increase the engine speed to rated rpm before applying the load.
- Adjust the voltage and the frequency, if necessary.
- Close the main circuit breaker in order to apply the load.
- Continue to check the gauges and the generator.