Q: How to Maintain Your Thermostat for Optimal Engine Coolant Performance on 2008 Dodge Challenger?
A: When servicing the engine coolant thermostat, always begin by unhooking and separating from the negative battery cable. After that, drain the coolant from the system. At the thermostat housing, take out the top radiator hose. Since the thermostat O-ring belongs to the thermostat, you should not service it by itself. In the end, unscrew the housing mounting bolts, take out the thermostat housing and remove the thermostat.