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Cylinder Bore Taper

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to SPECIFICATIONS (2.5L), SPECIFICATIONS (Hybrid), SPECIFICATIONS (3.0L) and SPECIFICATIONS (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: Measuring Cylinder Bore
    G06064069Courtesy of FORD MOTOR CO.