2010 Lincoln MKS Owner Guide 2nd Printing - Page 321

Maintenance and Specifications concentration should be maintained at 50/50 coolant and distilled water, which equates to a freeze point of -34°F (-36°C). Coolant concentration testing is possible with a hydrometer or antifreeze tester. The level of coolant should be maintained at the FULL COLD level or within the COLD FILL RANGE in the coolant reservoir. If the level falls below, add coolant per the instructions in the Adding engine coolant section. Your vehicle was factory-filled with a 50/50 engine coolant and water concentration. If the concentration of coolant falls below 40% or above 60%, the engine parts could become damaged or not work properly. A 50/50 mixture of coolant and water provides the following: • Freeze protection down to -34°F (-36°C). • Boiling protection up to 265°F (129°C). • Protection against rust and other forms of corrosion. • Proper function of calibrated gauges. When the engine is cold, check the level of the engine coolant in the reservoir. • The engine coolant should be at the FULL COLD level or within the COLD FILL RANGE as listed on the engine coolant reservoir (depending upon application). • Refer to scheduled maintenance information for service interval schedules. • Be sure to read and understand Precautions when servicing your vehicle in this chapter. If the engine coolant has not been checked at the recommended interval, the engine coolant reservoir may become low or empty. If the reservoir is low or empty, add engine coolant to the reservoir. Refer to Adding engine coolant in this chapter. Note: Automotive fluids are not interchangeable; do not use engine coolant, antifreeze or windshield washer fluid outside of its specified function and vehicle location. 321 2010 MKS (mks) Owners Guide, 2nd Printing USA (fus)