Thermostat Housing Assembly 4133L507, 4225430M1 Perkins

The Perkins 4133L507 / 4225430M1 Thermostat Housing Assembly is a genuine AGCO cooling system component engineered to provide precise engine temperature regulation and reliable coolant flow management for Perkins 1100 Series diesel engines. Combining the thermostat and water outlet housing into a single OEM-calibrated assembly, this unit helps maintain optimal operating temperature, reduce thermal stress, and improve overall engine efficiency under heavy-duty working conditions. Manufactured from high-strength aluminum alloy with stainless steel and brass internal components, the assembly is designed to withstand continuous exposure to coolant pressure, vibration, corrosion, and extreme temperature fluctuations commonly found in agricultural and industrial machinery. Its integrated wax-pellet thermostat mechanism begins opening at approximately 82°C (180°F), allowing accurate coolant circulation control between engine bypass passages and the radiator system. During cold starts, the assembly directs coolant through the internal bypass circuit to accelerate engine warm-up and improve combustion efficiency. Once operating temperature is reached, the thermostat progressively opens to route coolant toward the radiator, helping stabilize engine temperature and protect critical engine components from overheating or thermal fatigue. Designed to OEM specifications, the 4133L507 thermostat housing assembly ensures precise fitment, reliable sealing performance, and long service life in Perkins-powered agricultural, construction, and industrial equipment applications.