Why is the engine noise loud during acceleration?

[GrantDella]

The reasons for loud engine noise during acceleration are as follows: 1. Engine mount aging or loosening: Engine mounts are rubber blocks placed between the engine and the vehicle frame. Their purpose is to reduce vibration and cushioning during engine operation and to secure the engine in place. Once these mounts age or become loose, the engine will shake, and the faster the speed, the louder the shaking noise. Solution: Tighten or replace the engine mounts. 2. Improper use of engine oil: If the oil viscosity is too low, it will cause insufficient lubrication, leading to wear and abnormal noise from engine components; if the oil viscosity is too high, it will increase the engine load, also resulting in noise. Solution: Use the oil grade specified in the vehicle manual and avoid mixing different brands of oil. 3. Engine carbon deposits: When there is excessive carbon buildup inside the engine, the vehicle's ignition energy, air intake efficiency, and air-fuel mixture ratio will be affected, leading to unstable power output. Both idling and acceleration will exhibit shaking, and noise will enter the cabin. Solution: Visit a 4S shop for targeted treatment, such as an engine cleaning service to remove carbon deposits.