Wheel Bearings Diagnosis (Tapered): Smears

Fig 1: Identifying Smears

Courtesy of GENERAL MOTORS CORP.

The smearing of the metal is due to slippage. Slippage can be caused by the following factors:

• Poor fits
• Lubrication
• Overheating
• Overloads
• Handling damage

If this condition occurs, perform the following:

1. Check the seals.
2. Check for proper fit.
3. Check for proper lubrication.
4. Clean all the parts and the housings.
5. Replace the bearings. Refer to WHEEL HUB, BEARING, AND SEAL REPLACEMENT in Front Suspension.