What Causes the Steering Wheel to Make Noise When Turned to the Full Lock?
2 Answers
It could be due to damage to the planar bearing under the steering wheel. Another possibility is a loose tie rod end ball joint of the stabilizer bar. When the car is turning, the front suspension system is subjected to constantly changing forces, leading to the accumulation of internal stress. When the steering reaches a certain point, the increased stress causes an instantaneous displacement at the loose ball joint, resulting in vibration and noise. Below are some explanations regarding steering wheel noise: 1. Planar bearing damage: There is a continuous friction sound when the steering wheel is turned. This noise is likely caused by a damaged planar bearing under the steering wheel. The planar bearing, also known as the thrust bearing, is located at the top of the front shock absorber where it connects to the vehicle body. Its function is to allow the shock absorber to rotate with the wheel during steering, while the planar bearing facilitates the rotation between the shock absorber and the vehicle body. If this noise occurs, it should be checked promptly; otherwise, it may eventually prevent the steering wheel from turning. 2. Loose tie rod end ball joint of the stabilizer bar: This situation is likely caused by a loose tie rod end ball joint of the stabilizer bar. During steering, the front suspension system experiences continuously changing forces, leading to the accumulation of internal stress. When the steering reaches a certain point, the increased stress causes an instantaneous displacement at the loose ball joint, resulting in vibration and noise. As the steering angle increases further, this stress causes the loose part to slip, generating vibration.
I've been driving for over a decade and have encountered steering wheel knocking sounds at full lock multiple times. This is usually caused by excessive system load at extreme positions, with common reasons being aging power steering pumps or insufficient fluid - the system produces humming or clunking noises under high pressure. My old car had this issue, and the mechanic found worn pump shaft bearings during inspection - replacement fixed it. Another possible cause is loose or dry universal joints in the steering mechanism, creating squeaking sounds from increased friction at full lock. I recommend prompt inspection since neglect could risk steering failure. For maintenance, ensure proper power steering fluid levels and timely fluid changes. Minimize full-lock steering maneuvers - when parking, leave slight steering room. Spending small amounts on prevention avoids major issues - very cost-effective.
