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Crankshaft Main Bearing Journal Diameter

WARNING: This page is about a different car, the 2011 Ford Pickup, 2011 Ford F550 Super Duty, 2011 Ford F450 Super Duty, and 2011 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean the crankshaft with a suitable solvent. Dry with compressed air.
  2. Use a stiff nylon brush to clean all internal oil passages of the crankshaft. Loosen all accumulated dirt, sludge and deposits. Flush oil passages with a suitable solvent.
  3. Inspect crankshaft journals for scratches, grooves and scoring.
  4. Inspect crankshaft main bearings for scratches, grooves, scoring, pitting and inconsistent coloring.
  5. Use a 75-100 mm (3-4 in) micrometer to measure the diameter of each journal. Measure each journal at 2 points, 90 degrees apart. Move the micrometer over the entire width of the journal. For additional information, refer to SPECIFICATIONS  in this service information.
    Fig 1: Measuring Crankshaft Main Bearing Journal Diameter
    G07480768Courtesy of FORD MOTOR CO.
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