2011 Jeep Patriot Owner Manual - Page 420

418 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 (antifreeze) accumulation of foreign material on the sealing surfaces. solution. The use of lower quality water will reduce the WARNING! amount of corrosion protection in the engine cooling system. • The warning words "DO NOT OPEN HOT" on Please note that it is the owner's responsibility to mainthe cooling system pressure cap are a safety pretain the proper level of protection against freezing accaution. Never add engine coolant (antifreeze) cording to the temperatures occurring in the area where when the engine is overheated. Do not loosen or the vehicle is operated. remove the cap to cool an overheated engine. Heat causes pressure to build up in the cooling system. NOTE: Mixing engine coolant (antifreeze) types will To prevent scalding or injury, do not remove the decrease the life of the engine coolant (antifreeze) and pressure cap while the system is hot or under will require more frequent coolant changes. pressure. Cooling System Pressure Cap • Do not use a pressure cap other than the one The cap must be fully tightened to prevent loss of engine specified for your vehicle. Personal injury or encoolant (antifreeze) and to ensure that engine coolant gine damage may result. (antifreeze) will return to the radiator from the coolant recovery bottle.