410289.81D | Genuine International® Coolant Thermostat

Functions: 
Temperature control: Maintains optimal engine operating temperature by controlling coolant flow.   
Warming up: When the engine is cold, the thermostat remains closed, directing coolant through a smaller circuit to quickly warm up the engine.   
Cooling down: Once the engine reaches operating temperature, the thermostat opens, allowing coolant to circulate through the radiator for cooling.   

This thermostat is important for maintaining the engine at the optimum operating temperature by regulating the flow of coolant. When the engine is cold, the thermostat is closed, helping it warm up quickly, and once operating temperature is reached, it opens, allowing coolant to circulate through the radiator for cooling. This ensures efficient engine operation and prevents it from overheating.

Navistar International Corporation, an American company, manufactures a wide range of vehicles, including trucks, buses, and defense vehicles, along with engines. It's the first to be EPA-certified for meeting 2007 standards. They also provide high-quality replacement parts and accessories, ensuring top performance. Navistar is actively developing electric and hybrid solutions for transportation, serving logistics, construction, and public transport sectors.