MBE 900 OPERATOR'S GUIDE All information subject to change without notice. (Rev. 04/08) 53 DDC-SVC-MAN-0055 04/08 Copyright © 2008 DETROIT DIESEL CORPORATION Problem—The Engine Exhaust Is White Cause Remedy The fuel is of poor quality. Add fuel of the right quality. The intake air preheater is malfunctioning. Check the intake air preheater, and replace it, if necessary. The valves are not adjusted properly. Check the valve lash. Problem—The Engine Exhaust Is Black Cause Remedy The air filter and/or intake air system is clogged. Check the air restriction indicator. Clean the intake air system and replace the air filter if necessary. The exhaust brake valve is malfunctioning.
Have an authorized dealer check the operation of the valve. The intake air preheater is malfunctioning. Check that the heater is not staying on all of the time. The valves are not adjusted properly. Check the valve lash. There is damage to the fuel system: the fuel pump, one or more fuel injectors, or one or more unit pumps are damaged. Bring the vehicle to an authorized dealer for service. The charge-air temperature sensor is damaged. Bring the vehicle to an authorized dealer for service. There is internal damage to the engine. Bring the vehicle to an authorized dealer for service.