1. Check: piston pin
Blue discoloration/grooves → Replace, then inspect the lubrication system.
2. Measure: piston pin outside diameter (a)
Out of specification → Replace the piston pin.
Piston pin outside diameter: 21.991-22.000 mm
3. Measure: piston pin bore inside diameter (b)
Out of specification → Replace the piston.
- Piston pin bore inside diameter: 22.004-22.015 mm
4. Calculate: piston-pin-to-piston clearance
Out of specification → Replace the piston pin.
Piston-pin-to-piston clearance = Piston pin bore size (b) - Piston pin outside diameter (c)
- Piston-pin-to-piston clearance: 0.004-0.024 mm