Engines The two most commonly used terms associated with preparation of equipment for low temperature operation are "winterization" and "arctic specifications." est Freightliner dealer or Cummins engine dealer, to obtain the special items required. Winterization of the engine and/or components, so that starting and operating are possible in the lowest tem- perature to be encountered, requires: CAUTION "Antileak" antifreezes are not recommended for use in Cummins engines. Although these antifreezes are chemically compatible with DCA water treatment, the "antileak" agents may clog the coolant filters. Adequate lubrication with low-temperature lubri- cating oils.
Protection from the cold air (insulation). The metal temperature does not change, but the rate of heat dissipation is affected. IMPORTANT: Fuel heaters used on vehicles with Cummins engine systems could cause high fuel temperatures that affect engine performance and operation of the electronic engine controls. If a fuel heater is used, make sure it has thermostatic con- trols. If the fuel heater has a timer, set the timer to activate only for a limited period of time before the engine starts. Make sure the fuel heater is used only for starting the engine. Fuel of the proper grade for the lowest tempera- ture.
Using a block heater to raise the engine block and component temperatures to at least (–32°C) for starting in lower temperatures. Electrical equipment capable of operating in the lowest expected temperature. All switches, con- nections, and batteries in the electrical system should be inspected, and kept in good condition to prevent losses through poor contacts. Engine Break-In Cummins Engines Arctic specifications refer to the design of mate- rial and specifications of components necessary for satisfactory engine operation in extremely low temperatures to (–53°C). Contact the near- Cummins engines are run on a dynamometer before being shipped from the factory.
In most applications, the engine can be put to work immediately, but, during the initial 100 hours or 3000 miles (4000 km) of service the 4.4