Service manual

ENGINE
PISTON INSPECTION
1. Measure piston outside diameter at a point 7mm up
from the bottom of the piston at a right angle to the
direction of the piston pin.
2. Subtract this measurement from the maximum cylinder
measurement obtained earlier.
Piston to Cylinder Clearance
Std: 0.02-0.05 mm
Limit: 0.1 mm
3. Measure piston pin bore. Replace piston if
out--of--round
4. Measure piston pin O.D. Replace piston pin if
out--of--round.
5. Measure connecting rod small end ID. Replace
crankshaft if out--of--round.
6. Measure piston ring to groove clearance by placing the
ring in the ring land and measuring with a thickness
gauge. Replace piston and rings if ring-to-groove
clearance exceeds service limits.
4.21