A Thermostat Housing is part of an internal combustion engine's cooling system that contains the thermostat, which is a valve that regulates the flow of coolant through the engine. It is made of metal or plastic and is located on the engine block or cylinder head.Attributes: • Prevent the engine from overheating• Anodized for corrosion resistanceApplications:A Thermostat Housing allows the direct flow of coolant and prevents coolant leaks.