2015 Ford Fiesta Owner Manual Printing 2 - Page 187

Maintenance Note: Coolant expands when it is hot. The level may extend beyond the MAX mark. Note: If the level is at the MIN mark, below the MIN mark, or empty, add coolant immediately. See Adding Engine Coolant in this chapter. Maintain coolant concentration 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, for example 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. Note: Do not use stop leak pellets, cooling system sealants or additives as they can cause damage to the engine cooling or heating systems. The vehicle warranty does not cover this damage. Note: During normal vehicle operation, the engine coolant may change color from orange to pink or light red. As long as the engine coolant is clear and uncontaminated, this color change does not indicate that the engine coolant has degraded or that you drain the engine coolant, flush the system or replace the engine coolant. • Do not mix different colors or types of coolant in your vehicle. Make sure the correct coolant is used. Mixing of engine coolants may harm the engine's cooling system. The use of incorrect coolant may harm engine and cooling system components and may void the warranty. Use prediluted engine coolant meeting the Ford specification. See Capacities and Specifications (page 241). In case of emergency, you can add a large amount of water without engine coolant in order to reach a vehicle service location. In this instance, you must have the cooling system drained, chemically cleaned with Motorcraft Premium Cooling System Flush, and refilled with engine coolant as soon as possible. Water alone (without engine coolant) can cause engine damage, for example corrosion, overheating or freezing. Do not use alcohol, methanol, brine or any engine coolants mixed with alcohol or methanol antifreeze. Alcohol and other liquids can cause engine damage, for example overheating or freezing. Do not add extra inhibitors or additives to the coolant. These can be harmful and compromise the corrosion protection of the engine coolant. Adding Engine Coolant WARNINGS 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, spilling coolant on hot engine parts can burn you. Do not put engine coolant in the windshield washer fluid reservoir. If sprayed on the windshield, engine coolant could make it difficult to see through the windshield. Do not add coolant further than the MAX mark. 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. • • • 184 Fiesta (CCT), enUSA, Second Printing