Cylinder Bore Out-of-Round

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to the appropriate Engine Mechanical article for the specification.

Measure the cylinder bore in 2 directions. The difference is the out-of-round.

Fig 1: Identifying Cylinder Bore Out-Of-Round Measuring Directions
Courtesy of FORD MOTOR CO.