Sealed Cooling System Cap

The cap must be fully tightened to prevent loss of engine coolant (antifreeze), and to ensure that the engine coolant returns to the radiator from the coolant recovery reservoir, if equipped.

Inspect and clean the cap if foreign material has accumulated on the sealing surfaces.

• Do not open the cooling system when the engine is hot. Never add engine coolant (antifreeze) when the engine is overheated. Do not loosen or remove the cap to cool down an overheated engine. Heat causes pressure to build up in the cooling system. To avoid burns or injury, do not remove the cap while the system is hot or under pressure.
• Do not use any sealing cap other than the one specified for your vehicle. Personal injury or engine damage may result.