What Causes Abnormal Noises When a Car Turns?
3 Answers
Possible reasons for abnormal noises when a vehicle turns include aging or excessive play in the steering tie rod ball joint, which requires replacement of the steering tie rod ball joint, followed by a four-wheel alignment. Other potential causes include leaking of the steering gear dust cover, excessive gear clearance in the steering mechanism, potential failure of the shock absorber top mount or thrust bearing requiring replacement, improper tension or aging of the power steering belt, etc. Additional details are as follows: Power Steering System: Modern mid-to-high-end cars and heavy-duty vehicles commonly use power steering systems, which significantly improve the ease of vehicle operation and enhance driving safety. The power steering system is based on the mechanical steering system with the addition of a power-assisted device that relies on the engine's output power. Cars generally employ a rack-and-pinion power steering mechanism. This type of steering system is simple in structure, highly responsive, easy to operate, and, since it is fully enclosed, requires no regular inspection or adjustment. Maintenance Methods: Regularly check the fluid level in the power steering reservoir. When hot (approximately 66°C, feeling hot to the touch), the fluid level must be between the HOT and COLD marks. When cold (approximately 21°C), the fluid level must be between the ADD and COLD marks. If the fluid level does not meet the requirements, it is necessary to add DEXRON2 power steering fluid (hydraulic transmission fluid).
When there's abnormal noise during car turns, I think the most common cause is a problem with the suspension system, such as aging shock absorbers or worn rubber bushings on the control arms, causing metal parts to rub and produce squeaking sounds. Once during a long-distance drive, I heard strange noises when turning and later found out it was a bad wheel bearing that produced a humming sound when the load increased during turns. The steering system is also prone to issues, like loose ball joints or tie rods, which can create clicking noises at large turning angles. Additionally, uneven tire wear or insufficient tire pressure may cause friction noises, and stuck brake calipers in the braking system can also produce abnormal sounds. I experienced a similar issue with a friend's car. The first step is to simply check under the chassis for any loose components after parking, but for safety, it's best to have a professional repair shop conduct a comprehensive inspection. Unrepaired suspension problems can lead to loss of control risks. Regular maintenance of suspension components can prevent these abnormal noises from occurring.
I also encountered abnormal noises when turning in my own car, and you can do some preliminary checks yourself. Check if the tire pressure is normal, as uneven pressure can increase noise; listen to the source of the sound—noises from the front could indicate a faulty power steering pump or steering column, while noises from the rear are common in rear-wheel-drive cars due to worn differentials or drive shafts. Brake pads sticking can also produce scraping sounds during turns, and loose stabilizer bar links may create metallic clanging noises. I think it's important not to overlook these small details, as recording the type of sound and the scenario in which it occurs can help technicians diagnose the issue. Once, my car made a humming noise during sharp turns, which went away after replacing the bearings. I recommend visiting a 4S shop as soon as possible for a thorough inspection using computer diagnostic tools to avoid larger repairs. Pay attention to the frequency of abnormal noises while driving, as this can help you detect potential issues earlier.
