What Causes the Squeaking Sound During Low-Speed Turns?
2 Answers
Low-speed turning squeaking may be caused by slipping of the power steering pump drive belt, unloading idle rotation of the steering pump, brake pads rubbing against the brake disc, or issues with the vehicle's drivetrain system. Below are detailed explanations: 1. The steering pump is driven by a belt. If the friction between the belt and pulley is insufficient, the belt will slip on the pulley, producing a squeaking sound. Possible causes include an overly loose belt adjustment, excessive wear on the pulley groove, or poor fit between a new belt and an old pulley. 2. When turning the vehicle, if the steering resistance exceeds the system's maximum pressure, the steering pump will unload and idle to protect the pump and steering gear. Typically, a "squeaking" unloading sound can be heard. This phenomenon is more pronounced when the steering fluid is contaminated, the steering filter is clogged, or there is air in the hydraulic system. The resistance encountered during low-speed or stationary steering is the greatest. Friction between the steering linkage and the power assist rod can also cause abnormal noises. In such cases, the vehicle should be placed on a lift for a thorough chassis inspection, ensuring to turn the steering wheel to full lock before observation.
I've been driving for decades and have encountered the issue of squeaking during low-speed turns several times. It's usually due to wear in the ball joints of the steering system, especially the tie rod ends, which can produce noise from friction when lacking lubrication. Loose suspension components like shock absorbers or control arms can also cause such sounds. My old car had this problem last time—it made a particularly loud noise when turning, and after inspection, it turned out the CV joint was damaged. Replacing the part fixed the noise. Underinflated tires can also increase friction. It's important to address this early, as it could affect handling—safety first. I recommend getting a comprehensive inspection of the chassis components at a repair shop to prevent minor issues from turning into major repairs. Remember, regular lubrication of suspension parts can prevent such noises.
