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Home >> Ford >> 2005 >> Excursion 5.4 L, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine System-General Information >> General Procedures >> Cylinder Bore Taper

Cylinder Bore Taper

  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: Identifying Cylinder Bore Measuring Directions
G03905260Courtesy of FORD MOTOR CO.