What are the reasons for the engine temperature always being too high?
2 Answers
There are several main reasons for engine overheating: 1. Insufficient coolant: A lack of coolant can cause the engine temperature to rise. In this case, you should check the coolant level and add more if necessary to reach the appropriate level. 2. Faulty cooling fan: If the cooling fan malfunctions, the heat generated during high-speed operation cannot be effectively transferred to the coolant, affecting heat dissipation. This can lead to an increase in coolant temperature, potentially causing boiling and other issues. 3. Faulty water pump: Water pump failures can include seized bearings or damaged impellers. While seized bearings are relatively rare, damaged impellers—such as cracked impellers or impellers loosened from the pump shaft—are more common. These issues can slow down the coolant circulation, making the engine prone to overheating.
In my over ten years of driving, the thing I fear the most is when the temperature gauge suddenly spikes. That one time on the highway, the cooling system failed, causing the temperature to shoot straight into the red zone. There could be several possible reasons: insufficient or leaking coolant, meaning there's too little liquid in the radiator; the water pump not turning or having worn blades, hindering fluid circulation; the thermostat stuck in the closed position, preventing water from entering the radiator; the fan motor burning out or failing to start, making heat dissipation impossible; internal blockage or external dirtiness of the radiator, reducing heat exchange efficiency. Driving habits can also contribute, like continuous uphill driving with the AC on, causing the engine to overheat. Now, I always remind myself to check the coolant level, replace aging fluid in time, and stay alert when the fan makes noise. If the problem recurs, it's best not to tinker with it yourself—get it repaired immediately. High engine temperature can easily damage core components, and the repair costs can be heartbreaking.
