Crankshaft Main Bearing: Service and Repair

Bearing Inspection

1. Inspect bearings for the following defects:

1. Cratering - fatigue failure

2. Spot polishing - incorrect seating

3. Imbedded dirty engine oil

4. Scratching - dirty engine oil

5. Base exposed - poor lubrication

6. Both edges worn - journal damaged

7. One edge worn - journal tapered or bearing not seated