Checking the cylinder and piston

1. Check:

• Piston wall
• Cylinder wall Vertical scratches Replace the
  cylinder, and replace the piston and piston rings as a set.

2. Measure:

• Piston-to-cylinder clearance

a. Measure cylinder bore "C" with the cylinder bore gauge.

NOTE:

Measure cylinder bore "C" by taking side-to-side and front-to-back measurements of the cylinder.

Then, find the average of the measurements.

b. If out of specification, replace the cylinder, and replace the piston and piston rings as a set.

c. Measure piston skirt diameter D "a" with the micrometer.

b. 5.0 mm (0.20 in) from the bottom edge of the piston

d. If out of specification, replace the piston and piston rings as a set.

e. Calculate the piston-to-cylinder clearance with the following formula.

f. If out of specification, replace the cylinder, and replace the piston and piston rings as a set.