In the cooling system of an automobile engine, the thermostat is a crucial component that plays a significant role in ensuring the engine operates correctly. So, how do we determine if the thermostat is damaged?
Firstly, we can observe the water flow in the coolant reservoir to make an assessment. After starting the engine, open the coolant reservoir cap and observe whether there is a circulating flow of coolant. If not, it indicates that the thermostat may be damaged.
Additionally, we can assess the thermostat's condition by sensing the temperature difference between the upper and lower hoses. After starting the engine, wait for about 3 minutes and use your hand to feel the temperature difference between the upper and lower hoses. Normally, a functional thermostat will result in a higher temperature in the upper hose and a lower temperature in the lower hose. However, if the temperatures of the upper and lower hoses remain the same, or both hoses are cool when the engine water temperature reaches 90°C, the thermostat is likely damaged.
Furthermore, a boiling test can be performed by removing the thermostat and placing it in boiling water. If the thermostat opens smoothly without sticking as the water temperature rises, it indicates that the thermostat is functioning properly. Conversely, if it fails to open or shows signs of sticking, the thermostat is likely damaged.
Therefore, using the above methods, we can relatively accurately determine if the thermostat is faulty and take appropriate repair measures. It is recommended for vehicle owners to promptly inspect the thermostat when abnormal temperatures are detected and to take the vehicle to a repair shop for maintenance to prevent further damage to the engine caused by high temperatures.
