Primary Thermostat
The primary thermostat has two thermostatic devices in one assembly. It is located in the coolant crossover at the front of the engine. The thermostat regulates the engine coolant temperature by controlling the flow of coolant through the primary radiator. The two thermostatic devices do not open at the same coolant temperature. The opening temperatures are staggered by design, one opens at 90ยฐC (194ยฐF), other opens at 94ยฐC (201ยฐF).
Engine Coolant Temperature ECT Sensor
The ECT sensor is located in the coolant crossover, above the coolant pump and next to the thermostat housing.