Section 03-00: Engine, Service | 1996 All F-150, F-250, F-350, F-Super Duty and Bronco Vehicles Equipped with 4.9L, 5.0L, 5.8L or 7.5L Gasoline Engines, and 7.3L Diesel Engines Workshop Manual |
Cleaning
NOTE: Do not scrape gum or varnish deposits from the bearing shells.
Bearings that are to be reused should be identified so they can be installed in their original locations.
Clean the bearing inserts and caps thoroughly in solvent, and dry them with compressed air.
Inspection
Inspect each bearing carefully. Bearings that have a scored, chipped or worn surface should be replaced. Typical examples of unsatisfactory bearings and their causes are shown in the illustration. The copper lead bearing base may be visible through the bearing overlay. If the base showing is less than 20 percent of the total area, the bearing is not excessively worn. It is not necessary to replace the bearing if the bearing clearance is within recommended limits. Check the clearance of bearings that appear to be satisfactory with Plastigage® D81L-6002-B or equivalent as described in Crankshaft Main or Connecting Rod Bearings, Fitting in this section.
| Item | Part Number | Description |
|---|---|---|
| 1 | 6333 | Connecting Rod Bearing |
| A | — | Fatigue Failure — Craters or Pockets |
| B | — | Improper Seating — Bright (Polished) Sections |
| C | — | Dirt Scratching, Imbedding |
| D | — | Overlay Wiped Out — Lack of Oil or Improper Clearance |
| E | — | Hourglass — Overlay Gone from Edges |
| F | — | Radius Ride |
| G | — | Edge Worn — Bearing Off Location |