Thermostat Housings

The thermostat housing doubles as the coolant outflow in many internal combustion engines. It often sits on the cylinder head or engine block. It houses the thermostat, which aids in regulating the temperature at which the engine operates. It sits between the engine and the radiator since it is connected via hoses to the engine on one side and the radiator on the other.
The thermostat is shielded by the thermostat housing, which aids in preventing damage and coolant leaks. The thermostat housing used to be constructed of metal in earlier times, but manufacturers have recently begun making them out of plastic because it is simpler to create the intricate designs and, of course, it is less expensive.