Piston, Pin, and Connecting Rod Replacement: Inspection

NOTE: Inspect the piston, piston pin, and 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 0.8646-0.8648 in.)

Service Limit: 21.953 mm (0.8643 in.)

Fig 1: Measuring Diameter Of Piston Pin
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Zero the dial indicator to the piston pin diameter.

Fig 2: Identifying Piston Dial Indicator
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check the difference between the piston pin diameter and piston pin hole diameter in the piston.
Piston Pin-to-Piston Clearance

Standard (New): -0.005 to +0.002 mm -0.00020 to +0.00008 in.)

Service Limit: 0.005 mm (0.0002 in.)

Fig 3: Checking Piston Pin Hole Diameter
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 0.0002-0.0006 in.)

Service Limit: 0.02 mm (0.0008 in.)

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