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Connecting Rod Cleaning: Inspection

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  1. Using a suitable solvent, thoroughly clean the connecting rod and rod cap.
  2. Mark each connecting rod and its corresponding rod cap for correct installation.
  3. Measure the inside diameter of the piston pin bushing. Install a new connecting rod, if not within specification.
    Fig 1: Measuring Inside Diameter Connecting Rod
    G03887071Courtesy of FORD MOTOR CO.
  4. Using a suitable micrometer, measure the connecting rod bearing bore.
    1. Remove the connecting rod bearings from the connecting rod and the connecting rod cap. Install the connecting rod cap onto the connecting rod and tighten the bolts.
    2. Further tighten the connecting rod cap bolts.
      • Measure and record the connecting rod bearing bore as indicated. Install new connecting rods if not within specification.
        Fig 2: Measuring Inside Diameter Connecting Rod Big Bearing Bore
        G03887072Courtesy of FORD MOTOR CO.
  5. Using a suitable micrometer, inspect the connecting rod bearing bore taper.
    1. Measure the bearing bore inside diameter near the large chamfer.
      • Measure the bearing bore inside diameter near the small chamfer.
        • The difference between the 2 readings is the bore taper. Install new connecting rods if not within specifications.
          Fig 3: Measuring Connecting Rod Bearing Bore Taper
          G03887073Courtesy of FORD MOTOR CO.
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