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General Procedure

NOTE: Refer to general specifications in the appropriate 303-01 engine section for the appropriate specification.

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 if the cylinder bore is not within specification.

Fig 1: Identifying Cylinder Bore Taper Measuring Procedure
G07420872Courtesy of FORD MOTOR CO.