CLEANING AND INSPECTION CONTINUED
6. Check piston clearance in sleeves as follows:
a. Measure inside diameter of six cylinder sleeves (Figure 2, Item 1) with a dial bore gauge. Take
measurements at right angles.
Figure 2. Checking Sleeve ID.
Piston is cam ground, therefore it has two different diameters. Diameter across piston pin
bosses is less than diameter across thrust face. In order to check piston to sleeve
clearance, it is necessary to measure skirt at 90 degrees to pin centerline.
b. Measure outside diameter of piston (Figure 3, Item 1) at bottom of skirt.
Figure 3. Checking Piston Outside Diameter.