2013 Dodge Durango Owner's Manual - Page 630

628 MAINTAINING YOUR VEHICLE • Use only high purity water such as distilled or deionized The cap should be inspected and cleaned if there is any water when mixing the water/engine coolant (anti- accumulation of foreign material on the sealing surfaces. freeze) solution. The use of lower quality water will reduce the amount of corrosion protection in the engine WARNING! cooling system. • The warning words "DO NOT OPEN HOT" on the Please note that it is the owner's responsibility to maincooling system pressure cap are a safety precaution. tain the proper level of protection against freezing acNever add engine coolant (antifreeze) when the cording to the temperatures occurring in the area where engine is overheated. Do not loosen or remove the the vehicle is operated. cap to cool an overheated engine. Heat causes pressure to build up in the cooling system. To NOTE: Mixing engine coolant (antifreeze) types is not prevent scalding or injury, do not remove the recommended and can result in cooling system damage. pressure cap while the system is hot or under Drain, flush, and refill as soon as possible to avoid pressure. damage if coolant types are mixed in an emergency. • Do not use a pressure cap other than the one Cooling System Pressure Cap specified for your vehicle. Personal injury or engine damage may result. The cap must be fully tightened to prevent loss of engine coolant (antifreeze), and to ensure that engine coolant (antifreeze) will return to the radiator from the coolant recovery tank.