2015 Lincoln MKX Owner Manual Printing 1 - Page 256

Maintenance ENGINE COOLANT CHECK 255 Checking the Engine Coolant The concentration and level of engine coolant should be checked at the intervals listed in Scheduled Maintenance Information. Note: Make sure that the level is between the COLD FILL RANGE marks on the coolant reservoir. Note: Coolant expands when it is hot. The level may extend beyond the upper COLD FILL RANGE mark. Note: If the level is at the lower COLD FILL RANGE mark, below the lower COLD FILL RANGE mark, or empty, add coolant immediately. See Adding Engine Coolant in this chapter. The coolant concentration should be maintained within 48% to 50% which equates to a freeze point between -30 °F (-34 °C) and -34 °F (-37 °C). Note: For best results, coolant concentration should be tested with a refractometer such as Robinair Coolant and Battery Refractometer 75240. We do not recommend the use of hydrometers or coolant test strips for measuring coolant concentrations. Note: Automotive fluids are not interchangeable; do not use engine coolant/antifreeze or windshield washer fluid outside of its specified function and vehicle location. Adding Engine Coolant WARNING: Do not add engine coolant when the engine is hot. Steam and scalding liquids released from a hot cooling system can burn you badly. Also, you can be burned if you spill coolant on hot engine parts. WARNING: Do not put engine coolant in the windshield washer fluid container. If sprayed on the windshield, engine coolant could make it difficult to see through the windshield. WARNING: To reduce the risk of personal injury, make sure the engine is cool before unscrewing the coolant pressure relief cap. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly.