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What Causes the Noise When Turning the Steering Wheel to Full Lock?

2 Answers

CoraAnn

07/29/25 8:01pm

Noise when turning the steering wheel to full lock occurs because the power steering pump is damaged, preventing the power steering fluid from circulating or causing obstruction. Solutions: 1. Try to avoid holding the steering wheel at full lock for extended periods; 2. If full lock is necessary, keep the duration as short as possible to avoid damaging the power steering pump. The power steering pump is a component that enhances and stabilizes vehicle performance, primarily assisting the driver in adjusting the vehicle's direction. When the car is turning, the torque sensor detects the steering wheel's torque and intended direction of rotation. These signals are sent to the electronic control unit via the data bus. Based on the transmitted torque, intended direction, and other data signals, the electronic control unit issues commands to the motor controller. The motor then outputs the required amount of rotational torque, thereby providing power steering assistance.

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Myron

08/14/25 3:59pm

I've also experienced the clunking sound when turning the steering wheel to full lock before. After consulting an experienced mechanic, I learned there are several main causes. The most common is worn steering ball joints - these components at the steering knuckle endure daily exposure and easily become loose, making a "click" sound at full lock. Another issue could be the power steering pump, especially in older hydraulic-assisted vehicles where full lock causes oil pressure to surge, making the belt squeal if it slips. Additionally, gear wear in the steering gear itself or loose positioning pins can create abnormal noises at extreme angles. From my own experience, loose chassis bolts can also cause this - I once heard metal clanging sounds on a bumpy road. Never ignore such noises - it's safest to get the car lifted for inspection at a repair shop early. Prolonged full-lock steering significantly reduces steering gear lifespan.

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