Keep the questions as broad as possible. Make sure you take notes and put them on the repair order.
These types of bearings are used by Toyota, VW and many other import nameplates.
Wheel speed data for the majority of Mercedes vehicles comes from active wheel speed sensors.
The classic symptom of a bad wheel bearing is typically a cyclic chirping, squealing or growling noise.
Damaged parts or improper torquing can cause premature hub failure and issues with overall vehicle performance.
Andrew Markel introduces a TSB from Nissan involving noise from the area of the CV joint, and discusses what could be causing the noise. Sponsored by Nissan.
Better designs are needed to accommodate large diameter wheels, which apply a heavier bending movement on the hub’s flange. Also, many of today’s vehicles have twice the power compared to new models of just a decade ago. This extra power can cause stress on the splines and stub axle.
This 2014 Fiat Abarth was brought in with the customer being concerned about a noise coming from the left rear. He was convinced that it was a tire. The noise was cyclical and it increased with speed. During inspection, the bearing had no detectable play, the tires were evenly worn, and no ABS wheel speed sensor codes were present. On the lift, the left bearing was significantly noisier than the right bearing when turned by hand. But, no extra play could be detected.
I know some of you think the wheel bearing replacement does not merit an article, but this attitude can cause a comeback for late-model European vehicles. Wheel bearings are changing because the vehicles they are attached to and the brake rotors located on the other side are evolving. This has changed the designs and specifications for most bearings.
Andrew Markel discusses wheel bearing flanges and how runout in one component can translate into more runout in the bearing. Sponsored by FAG, a Schaeffler brand.
Andrew Markel discusses bearing installation and how the torque specification of axle nuts should be closely followed. Sponsored by FAG.
Andrew Markel discusses pre-loading wheel bearings, and how it affects the geometry of the inside of the bearing. Sponsored by FAG.