SECTION 4. DISASSEMBLY AND SERVICE
8)
PISTON PIN-TO-PISTON PIN BORE CLEARANCE
Use an inside micrometer and an outside micrometer to measure piston pin bore’s inside diameter and
piston pin’s outside diameter, then use the measured values to calculate the difference; if difference is
beyond service limit, replace piston or piston pin according
to wear status.
Standard
Service limit
0.004-0.016 mm
0.06 mm
9) CYLINDER I.D.
Standard
Service limit
48.6 mm
48.765 mm
CONNECTING ROD
If the connecting rod is bent or twisted, or its big end’s bearing bush and small end shaft housing’s outer ring
has play, or one of its sides has cracks, the connecting rod must be scrapped and replaced with a new one.
1) CONNECTING ROD SMALL END I.D.
If it is smaller than standard, or beyond service limit,
replace the connecting rod.
Standard
Service limit
12.006 mm
12.07 mm
2) CONNECTING ROD BIG END I.D.
If it is smaller than standard, or beyond service limit,
replace the connecting rod.
Standard
Service limit
22.015 mm
22.065 mm
- 23 -
