F 150 4WD Pickup V8-5.4L VIN V Flex Fuel (2006)
Crankshaft Main Bearing: Service and Repair
Bearing Inspection
1. Inspect bearings for the following defects.
Possible causes are shown:
1. Cratering - fatigue failure.
2. Spot polishing - incorrect seating.
3. Imbedded dirt 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.
