What is the problem when the steering wheel makes noise at full lock?

[ValerieLee]

Steering wheel making noise at full lock is due to: 1. The plane bearing under the steering wheel is damaged; 2. The ball joint of the stabilizer link is loose. During car steering, the front suspension system is subjected to constantly changing forces, with internal stress accumulation. When steering reaches a certain degree, increased stress causes instantaneous displacement at the loose ball joint, resulting in vibration and abnormal noise. The plane bearing, also known as the pressure bearing, is located at the top of the front shock absorber where it connects to the vehicle body. Its working principle is that when the car turns, the shock absorber rotates with the wheel, and the plane bearing is required to complete this rotation between the shock absorber and the vehicle body. If such abnormal noise occurs, it should be promptly inspected and repaired, otherwise it may cause the steering wheel to become unable to turn.