Why is there still engine sound after the car is turned off?
2 Answers
There is still engine sound after the car is turned off because the electric fan is still working. The main reasons and precautions are as follows: Main reasons: The engine sound after the car is turned off is due to the electric fan working. Modern cars are designed with a delayed cooling function to prevent the engine or turbocharger from overheating. This function operates based on the water temperature measured by sensors until it drops within the set range, thereby better protecting the engine and turbocharger and extending their service life. Precautions: Wash and maintain the car before parking. Park the car in a garage or in a dry and shady place as much as possible, away from trees and billboards. Check the tire pressure and inflate in time if the pressure is insufficient. Pay attention to the aging condition of the tires.
I remember once after a long drive home, I turned off the engine but still heard a roaring sound, which was quite strange. Later I learned that this is usually the cooling fan still working. Right after the engine stops, the temperature is very high, so the computer controls the fan to keep running for a few minutes to dissipate heat and prevent engine damage from overheating. This is especially common after highway driving or in hot weather. My car has a turbocharger, which supposedly needs even more cooling, otherwise the internal components may age faster. The sound mostly comes from the fan, but it could also be residual operation of the water pump or compressor. Don’t worry, it’s a normal protective mechanism. Only if the sound is unusually loud or lasts too long should you take it to a repair shop for inspection. For regular maintenance, pay attention to cleaning the radiator area to avoid dust buildup and clogging.
