8131159
Thermostat Housing
Volvo

The thermostat housing is a critical engine cooling system component that houses the thermostat and directs coolant flow between the engine and radiator. It connects to coolant hoses and mounting surfaces, sealing interfaces with gaskets or O-rings to prevent leaks. Depending on design, it channels heated coolant toward the radiator or back into the engine to regulate operating temperature, support rapid warm-up, and protect against overheating. The housing is built to resist cracking from thermal cycling and vibration, with mounting points and ports arranged for reliable hose connections and sensor integration in many Volvo configurations. Replacing a worn or damaged housing restores predictable cooling performance, reduces the risk of coolant loss, and simplifies maintenance compared to older designs. Ensure correct thermostat and gasket compatibility, clean mating surfaces, and proper torque to achieve a reliable seal. Source One Parts Center