Piston, Engine

Checking piston ring end gap
^ Insert ring at a right angle to cylinder wall from above to lower cylinder opening approximately 15 mm cylinder edge. When inserting use pistons without rings








Checking piston ring side clearance
^ Before measuring] clean piston ring groove

Checking pistons
Special Tools and Equipment





^ External micrometer 75-100 mm
^ Measure approximately 10 mm from the lower edge at a 90°angle to piston pin axis.
^ Deviation from nominal dimension: maximum 0.04 mm
Specified dimension, Refer to Piston, Engine, Specifications, piston and cylinder measurements





Piston installed position and allocation piston/cylinder
^ Mark installed position and allocation to cylinder on piston head using chalk or water-proof felt pen.

Note: Do not use a center punch or scribe, since the piston head coating will be damaged.

^ Installation position:
Arrow on piston head points to belt pulley side





Piston and cylinder measurements
1) Dimensions exclude graphite coating (thickness 0 02 mm). The graphite coating wears off.