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Cylinder Bore Taper

  1. Measure the cylinder bore at the top, middle, and bottom of piston ring travel in two directions as indicated. Verify the cylinder bore is within the wear limit. The difference indicates the cylinder bore taper. Bore the cylinder to the next oversize.
    • Refer to ENGINE for the procedure.
      Fig 1: Measuring Cylinder Bore At Top
      G03446448Courtesy of FORD MOTOR CO.
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