What causes abnormal noise when stepping on the accelerator after replacing the timing belt?

[Gayle]

Abnormal noise when stepping on the accelerator after replacing the timing belt may be caused by excessive clearance in components like the drive shaft, poor lubrication, or improper assembly during maintenance. Minor noises: Minor noises, such as the sparking sound from high-voltage electricity leakage or slight looseness in rolling bearings, are generally low in volume and indicate minor wear on components. These issues typically do not worsen significantly over time, and the vehicle can continue to operate normally without immediate repair. Moderate noises: Moderate noises, such as those from the flywheel bearing or clutch release bearing, significantly affect vehicle performance but can still maintain key technical functions in the short term. These noises are usually louder and indicate greater wear on components, requiring timely repair.