Cylinders, Pistons & Piston Rings Inspection: Cylinders
- Inspect cylinder walls for scratches, roughness, or ridges which indicate excessive wear. If cylinder bore is very rough or deeply scratched, or ridged, rebore cylinder and use over size piston.
- Using a cylinder gauge, measure cylinder bore in thrust and axial directions at 2 positions (1, 2) as shown in the figure. If any of the following condition is noted, rebore cylinder.
- Cylinder bore dia. exceeds limit.
- Difference of measurements at 2 positions exceeds taper limit.
- Difference between thrust and axial measurements exceeds out-of-round limit.
Cylinder bore dia. limit: 88.050 mm (3.4665 in.)
Taper and out-of-round
Limit: 0.10 mm (0.004 in.)
NOTE: If any one of six cylinders has to be rebored, rebore all six to the same oversize. This is necessary for the sake of uniformity and balance.