Radiator Pressure Cap: Description
WARNING: This page is about a different car, the 2004 Dodge Grand Caravan, 2004 Dodge Caravan, and 2004 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
The cooling system pressure cap is located on the radiator. The cap construction includes; stainless steel swivel top, rubber seals, and retainer, main spring, and a spring loaded valve (Fig 1).