What are the symptoms of a failing thrust bearing?
2 Answers
Automotive thrust bearing failure symptoms include a "clicking" noise when turning the steering wheel, or a "thumping" sound when rotating the steering wheel while stationary or at low speeds. Other signs include steering wheel vibration, heavier steering feel, noticeably increased tire noise during driving, abnormal sounds when passing over speed bumps, vehicle pulling to one side, damage to the steering system, and suspension system damage. More detailed explanations are as follows: 1. Automotive thrust bearings, also known as pressure bearings, are most commonly found in MacPherson strut suspension systems. This is because the MacPherson strut design uses the spring shock absorber as the load-bearing pillar, which also serves as the pivot point for left and right steering movements in combination with the steering knuckle. 2. The thrust bearing is located at the top of the shock absorber, positioned between the spring and the shock absorber top mount. It must withstand vertical pressure while allowing free rotation, making it a crucial component for MacPherson suspension systems.
I encountered this issue last time when making a turn. As soon as I turned the steering wheel, there was a squeaking noise from the front of the car, sounding like metal rubbing, especially noticeable at low speeds. Even on slightly uneven roads, the steering wheel would shake, making the steering feel less smooth. If you get out and inspect the suspension area, you might notice that if the plain bearing is worn, shaking the wheel by hand will feel loose. Over time, the car becomes less stable, with poor shock absorption over speed bumps or potholes, causing a lot of bouncing. If not repaired promptly, it could even affect steering control, posing some risk, especially at high speeds. It's advisable to have a mechanic check these components during regular maintenance and replace them early to avoid bigger problems down the line. In short, abnormal noises and steering difficulties are common symptoms.
