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): 17.996-18.000 mm (0.7085-0.7087 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 Dial Indicator
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check the difference between the piston pin diameter and the piston pin hole diameter in the piston.
Piston Pin-to-Piston Clearance

Standard (New): 0.010-0.017 mm (0.0004-0.0007 in.)

Fig 3: Measuring Piston Pin-To-Piston Clearance
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check the difference between the piston pin diameter and connecting rod small end diameter.
Piston Pin-to-Connecting Rod Interference

Standard (New): 0.019-0.036 mm (0.0007-0.0014 in.)

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