What Causes Abnormal Noises When a Car is Driving at Low Speed?

[Catherine]

Vehicle driving at low speed when there is abnormal noise reasons are as follows: 1. Excessive clearance between the piston and cylinder wall. 2. The piston pin is assembled too tightly or the connecting rod bearing is assembled too tightly. 3. Excessive clearance between the tappet and its guide hole. 4. Wear of the cam profile of the valve train. Solution for abnormal noise when the vehicle is driving at low speed: Do not try to solve it by yourself, you need to go to the 4S shop for professional maintenance personnel to check and repair according to the actual situation. More information about abnormal noise when the vehicle is driving is as follows: 1. Most common abnormal noises of the engine depend on the speed state of the engine. 2. There are also many abnormal noises in the engine that are obviously related to the load.