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When an engine is to be stored for a period of time, special precautions should be taken to protect the interior and exterior of the engine. ‪

Cleaning the Engine

Please follow the equipment manufacturer's operating instructions for using high-pressure cleaning equipment. ‪

Information on suitable cleaning and protective products is available from any authorized dealer. ‪


To prevent damage to engine components during the cleaning process, keep the water moving at all times. Never direct water onto electrical components, plug connectors, seals or flexible hoses. ‪

Comply with the minimum working distance between the high-pressure nozzle and the surface being cleaned: ‪

  • Approximately 28 inches (700 mm) for circular pattern jets
  • Approximately 12 inches (300 mm) for 25-degree flat jets and dirt cutters

Cleaning the Cooling System

Clean the cooling system as follows: ‪

Note: Collect the used coolant, cleaning solutions, and washing liquids. Dispose of them in accordance with applicable laws regarding the protection of the environment.


Clean at moderate pressures only; otherwise the fins of the radiator grille could be damaged. ‪


To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 40 psi (276 kPa) air pressure.

  1. Remove debris (dust, insects, etc.) from the fins of the radiator grille by blowing them through with compressed air or spraying them out with water. Work from the rear of the radiator (in the opposite direction of the normal cooling air flow).
  2. Drain the coolant when the engine is cold. For detailed procedures, see the vehicle/chassis maintenance manual. For types of coolant,
  3. If the HVAC unit is connected to the cooling system, open the regulating valves all the way.

Degreasing the Cooling System

Degrease the cooling system as follows: ‪

  1. Fill the cooling system with a 5% solution (1.6 ounces per quart of water50 grams per liter) of a mildly alkaline cleaning agent, such as sodium carbonate.


    Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.

    • Always start and operate an engine in a well ventilated area.
    • If operating an engine in an enclosed area, vent the exhaust to the outside.
    • Do not modify or tamper with the exhaust system or emission control system.
  2. Run the engine at moderate speed until the thermostat starts to open, at an operating temperature of approximately 176F (80C). Then run it for about five minutes longer. Shut down the engine and allow it to cool to approximately 112F (50C).
  3. Drain all the cleaning solution.
  4. Flush the cleaning solution from the cooling system.
    1. Immediately after draining the cleaning solution, flush the system with clean water.
    2. Once the clean water has drained, fill the system again with clean water.
    3. Run the engine. Allow the engine to warm up to approximately 176F (80C), and then run it about five minutes longer.
    4. Drain the hot water.
  5. Fill the cooling system with new coolant. For detailed procedures, see the vehicle/chassis maintenance manual. For types of coolant,


Required protective measures for the MBE 4000 engine depend on the following: ‪

  • The length of time that the engine will be out of service
  • The climate and conditions where the engine is stored

After cleaning, engines should, whenever possible, be placed in a dry, well-ventilated place. ‪

In all cases, protect the engine against direct exposure to moisture (rain/splash water). ‪

If the engine is to be out of service for 12 months or less, anticorrosion measures are not necessary, provided that the place of storage are dry and well-ventilated as described above. ‪

If the engine is to be out of service for over 12 months, or under extraordinary storage or transportation conditions, then special protective measures are necessary. Information is available from any authorized dealer. It is strongly recommended that you request this information. ‪

Note: If the engine is to be out of service for over 18 months, the oil must be changed before the engine can be brought back into service.