Tip - How to Change the Thermostat on a Nissan Frontier | eHow

The thermostat in your Nissan Frontier is required to regulate the flow of coolant through your motor. The thermostat will send enough coolant through the motor to keep the engine running smoothly. The thermostat also ensure the coolant system pressurizes enough to draw the heat out of the coolant. The excess heat is used to run the heater in the...