K 3500 Truck 4WD V8-5.7L VIN R (1998)
The discoloration on the bearings ranges from faint yellow to dark blue and results from overload or an incorrect lubricant. Excessive heat causes
softening of the races or the rollers. In order to check for loss of temper on the races and the rollers, perform a file test. A file drawn over a tempered
part will grab and cut the metal and fail the file test. A file drawn over a hard part will glide readily with no metal cutting.
If overheating damage is indicated, perform the following:
1. Replace the bearings.
2. Check the seals and the other related parts.
MISALIGNMENT
The outer race is misaligned due to a foreign object.
1. Clean the related parts.
2. Replace the bearing.
3. Ensure the races are properly sealed.
CRACKED INNER RACE
The race is cracked due to improper fit, cocking, or poor bearing seats.
1. Replace the bearing.
