Piston, Pin, and Connecting Rod Replacement: Inspection

NOTE: Inspect the piston, the piston pin, and the connecting rod when they are at room temperature.

Measure the diameter of the piston pin.
Piston Pin Diameter

Standard (New): 21.961-21.965 mm (0.86460-0.86476 in)

Service Limit: 21.954 mm (0.86433 in)

Fig 1: Measuring Piston Pin Diameter
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Zero the gauge (A) to the piston pin diameter.

Fig 2: Setting Dial Indicator To Zero Position At Piston Pin Diameter
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check the difference between the piston pin diameter and piston pin hole diameter on the piston.
Piston Pin-to-Piston Clearance

Standard (New): -0.0050-0.0030 mm (-0.000197-0.000118 in)

Service Limit: 0.004 mm (0.00016 in)

Fig 3: Measuring Piston Pin-To-Piston Clearance
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the piston pin-to-connecting rod clearance.
Piston Pin-to-Connecting Rod Clearance

Standard (New): 0.005-0.015 mm (0.00020-0.00059 in)

Service Limit: 0.019 mm (0.00075 in)

Fig 4: Measuring Piston Pin-To-Connecting Rod Clearance
Courtesy of AMERICAN HONDA MOTOR CO., INC.