3967195 | 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 is an American company specializing in the production of trucks, buses, diesel engines and other transport equipment. They are known for their products for various industries including logistics, construction and public transport. The company is also actively working on the development of electric and hybrid solutions for the transport industry.