If it has the 3.5 motor, it may be a matter of bleeding the air out properly. There are several more common causes of overheating.
check thermostat. check engine fan coolant sensor possible locations radiator or thermostat housing. check electric fan working
The thermostat on a 2.7L Dodge Intrepid is under the housing where the lower radiator hose attaches to the engine.
There's a gasket between the thermostat and the block that you need to replace.
Follow the top radiator hose to the engine. It goes to the thermostat housing. Remove the 2 bolts in the housing and the thermostat is right below it.
Under the housing where the lower radiator hose hooks to the engine.
It is under the housing that the upper radiator hose hooks to on the engine.
I would start with checking your thermostat and thermostat housing. See if its regulating. If it is not replace the thermostat.
follow the top radiator hose to the engine and there will be two half inch bolts pull the housing off and that is your thermostat, replace in same position as the old one. p.s. is car overheating may not be thermostat, you can test thermostat in pan of boiling water and see if it opens or closes.
It is not where the housing is. You have to lift car and its behind alternater.. not easy but possible
Under the housing where the lower radiator hose hooks to the engine.
the thermostat will be under the THERMOSTAT HOUSING, which is where the TOP radiator hose fits on ie(radiator to thermostat housing) this keeps the engine at an OPTIMUM temperature BUT can be A cause of OVERHEATING IF malfunctioning
Follow the lower radiator hose to the block. The thermostat is under the housing the lower hose hooks to.