What Causes the Noise When Turning the Steering Wheel While Braking in Place?
2 Answers
Turning the steering wheel while braking in place produces abnormal noises due to differences in the vehicle's steering structure or excessive friction between the tires and the ground. Below are detailed explanations of the specific causes: Vehicle's Steering Structure: When turning the steering wheel in place, the steering wheels do not rotate around the center of the tires but rather roll with the tires. This is because the rotation center of the tires is not at their geometric center but at the rotation center of the steering knuckle. As a result, noise occurs when turning the steering wheel while braking in place. Friction Between Tires and Ground: When turning the steering wheel in place, the wheels actually roll in a circular motion centered on the steering knuckle axis. At this time, turning the steering wheel while braking inevitably hinders the rolling of the wheels, causing friction sounds between the tires and the ground. Additionally, it may create a tendency for relative movement between the brake pads and the brake disc, resulting in creeping sounds from the brake pads and disc. Driving Precautions: Avoid turning the steering wheel in place; try to steer only after the vehicle starts moving. Once the vehicle is parked, return the steering wheel to the neutral position to prevent unnecessary load on the suspension system and tires. When making a U-turn, avoid turning the steering wheel to the extreme lock position.
I had a similar experience when driving my dad's old SUV. When I stepped on the brake and turned the steering wheel while stationary, I heard a creaking sound like metal rubbing. After consulting a mechanic, I learned that it was actually the brake pads and brake discs fighting against each other. When the brakes are fully applied and the wheels are locked, forcing the steering wheel to turn puts extra pressure on the suspension and braking components. The steering mechanism pushes the tires to move, and the edges of the brake pads may rub against the caliper bracket, causing the noise. This is especially noticeable when the car is cold or after rain when the brake discs are rusty. As long as there's no abnormal noise when turning while driving, there's no need to worry too much. However, if you hear similar sounds during normal driving when turning, it's important to check the steering ball joints or plain bearings immediately.
