2012 Jeep Wrangler Owner Manual - Page 535

MAINTAINING YOUR VEHICLE 533 Cooling System Pressure Cap 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 reserve tank. Disposal Of Used Engine Coolant Used ethylene glycol based engine coolant (antifreeze) is a regulated substance requiring proper disposal. Check with your local authorities to determine the disposal rules for your community. To prevent ingestion by animals or children, do not store ethylene glycol based The cap should be inspected and cleaned if there is any engine coolant (antifreeze) in open containers or allow it accumulation of foreign material on the sealing surfaces. to remain in puddles on the ground. If ingested by a child or pet, seek emergency assistance immediately. Clean up WARNING! any ground spills immediately. The warning words DO NOT OPEN HOT on the Engine Coolant Level cooling system pressure cap are a safety precaution. The coolant bottle provides a quick visual method for Never add engine coolant (antifreeze) when the endetermining that the coolant level is adequate. With the gine is overheated. Do not loosen or remove the cap engine idling, and warm to normal operating temperato cool an overheated engine. Heat causes pressure to ture, the level of the engine coolant (antifreeze) in the build up in the cooling system. To prevent scalding bottle should be between the ranges indicated on the or injury, do not remove the pressure cap while the bottle. system is hot or under pressure. 7