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Cylinder Bore Taper

NOTE: Refer to the appropriate ENGINE - 3.5L for the specification.
  1. Measure the cylinder bore at the top, middle and bottom of piston ring travel in 2 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 limit.
    Fig 1: Checking Cylinder Bore At Top
    G06064069Courtesy of FORD MOTOR CO.
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