Engine Coolant Thermostat: Description
WARNING: This page is about a different car, the 2004 Dodge Intrepid, 2004 Chrysler Intrepid, 2004 Chrysler Concorde, and 2004 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
The thermostat on the 2.7L and 3.5L engines are located on the lower left side of engine, near the front (Fig 1) and (Fig 2). The thermostat on both engines are on the inlet side of the water pump. The thermostats have an air bleed located in the thermostat flange. The air bleed allows internal trapped air during cooling system filling to be released.