Machinery Truck Diesel QSB6.7 ISF3.8 Engine Parts Coolant Thermostat 5256423

The core function of our automotive thermostat is to automatically regulate the coolant’s path. During a cold start, the thermostat remains closed. This prompts the coolant to circulate in a small loop within the engine block, allowing the engine to warm up quickly. This process reduces wear and tear and also improves fuel economy. Once the engine reaches its optimal temperature, the thermostat opens sensitively. This redirects the coolant to the radiator for a large circuit. It effectively dissipates excess heat, ensuring the engine operates within an efficient and safe range.