This thermostat regulates the engine coolant flow to maintain the operating temperature within the designed range. It opens at a set temperature to allow coolant circulation through the radiator and closes when the engine is cold to speed warm-up. A stuck-open thermostat causes the engine to run below optimal temperature, reducing efficiency and increasing fuel consumption. A stuck-closed unit leads to overheating. This component is manufactured by Bepco to match the original housing geometry and seal surface, ensuring proper seating in the thermostat housing without modification. Replace the housing gasket on reinstallation.