Piston, Pin, and Connecting Rod Replacement: Inspection

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

Piston Pin Diameter

Standard (New): 17.996-18.000 mm (0.7085-0.7087 in.)

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

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

Standard (New): 0.010-0.018 mm (0.0004-0.0007 in.)

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

Standard (New): 0.020-0.036 mm (0.0008-0.0014 in.)

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