What Causes the Noise When Stepping on the Brake and Turning the Steering Wheel in Place?
2 Answers
The noise is mainly caused by the friction between the tires and the ground, as well as noises from the brake discs, steering system, and suspension system. When turning the steering wheel in place, the steering wheels do not rotate around their geometric centers but rather roll slightly because the rotation center of the tire is not at its geometric center but at the rotation center of the steering knuckle. Therefore, from a microscopic perspective, the wheels perform a circular roll centered on the steering knuckle axis when turning in place. Noise occurs when turning the steering wheel in place: This phenomenon is more common in vehicles with mechanical hydraulic power steering (HPS), which is a mature and cost-effective technology. Mechanical hydraulic power steering converts part of the engine's power into hydraulic pump pressure, which then applies force to the steering system to turn the tires. When the steering wheel is kept straight, the pressure on both sides of the piston is equal. Once the steering wheel is turned, the mechanical control valve connected to the steering column opens. Tire squealing noise due to friction: When stepping on the brake and turning the steering wheel in place, the friction between the wheels and the ground produces a squealing noise. The increased force on the steering system can cause vibrations, resulting in a clunking sound. Although the suspension system is also under stress, it usually does not produce noise unless there are pre-existing issues, which might lead to cracking or creaking sounds. Of course, it's not entirely forbidden to step on the brake and turn the steering wheel in place, as there are situations, such as making tight turns in narrow spaces, where it is necessary. Therefore, it's not something to completely avoid—just minimize it when possible. If you must step on the brake and turn in place, avoid pressing it too hard; a light touch to restrict vehicle movement is sufficient.
I've been driving for over a decade and encountered this situation several times. When you step on the brake and turn the steering wheel while stationary, abnormal noises often occur due to wear in steering system components; for example, the power steering pump may hum under high pressure, or aging steering bearings may squeak under stress. Additionally, pressing the brake too hard can lock the wheels, causing friction sounds from bushings or ball joints when turning the steering wheel. Last time my car had this issue, it was due to loose steering linkage, and the noise disappeared after the mechanic adjusted it. I recommend avoiding forcefully turning the steering wheel while stationary to reduce component fatigue; regularly maintain and inspect the suspension and steering mechanism, and address any issues early to prevent minor problems from escalating into major failures, which could lead to higher costs and compromise driving safety.
