- 1. Painting (formation of holes) - fatigue wear.
- 2. Polished in places - incorrect fit.
- 3. Embedded particles - contaminated engine oil.
- 4. Scratches - contaminated engine oil.
- 5. Scoring - poor lubrication.
- 6. Wear of both edges - damage to the neck.
- 7. Wear on one edge - neck taper or incorrect fit.

The publication was copied from a web resource [LRMAN.RU]
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