Why does the engine keep making noise after turning off?
1 Answers
The reasons why the engine keeps making noise after turning off: When the engine temperature is too high, even after the car is turned off and the key is removed, the water temperature inside the engine does not drop immediately. The radiator fan needs to continue cooling, and the cooling system will automatically activate to lower the engine temperature. Once the appropriate water temperature is reached, the fan will stop running. This means that even after the car is turned off, the fan may still be working. If this happens frequently, check whether the engine coolant is insufficient or if there are other reasons causing the engine to overheat. Another reason is that when the car is running, gasoline is burned, and through complex chemical reactions, some of the energy is converted into heat, which is expelled through the exhaust system. The muffler is located at the end of this system and functions to reduce exhaust noise. While working, the muffler is subjected to the impact of hot airflow and naturally heats up. After parking, due to thermal expansion and contraction, it may produce noise, sometimes quite loud, which is a normal phenomenon.