What Causes Abnormal Noise During Engine Acceleration?

[AnnaFitz]

Acceleration is the operation that most tests the quality of a car, and many car problems will manifest during acceleration, so regular maintenance is essential. The reasons for abnormal noise during engine acceleration are: transmission noise; valve noise; engine noise. The reasons for abnormal noise after a cold start are: belt slipping on the generator: intense friction and vibration between the belt and the pulley produce noise at a certain frequency. Belt slipping may be due to a loose belt, so it's important to have it checked at a repair shop promptly; usually, it's the sound of the valves: after a car has been parked for a long time, the engine oil returns to the bottom, meaning the top of the engine, or the valve chamber, will have less oil. Because the valves lack the sealing and lubrication provided by the oil, you may hear a lot of noise the next morning when starting the car.