Cylinder Bore

Cylinder Bore Taper and Out-of-Round





1. NOTE: The main bearing caps or lower crankcase must be in place and tightened to the specified torque; however, the bearing shells should not be installed.

Measure the cylinder bore with an internal micrometer.
- Carry out the measurements in different directions and at different heights to determine if there is any out-of-roundness or tapering. If the measurement is out of the specified range, install a new block or hone out the cylinder block (if applicable/allowed).