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): 22.961-22.965 mm (0.9040-0.9041 in.)

Service Limit: 22.953 mm (0.9037 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: Setting Dial Indicator To Zero Position
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): -0.002 to +0.005 mm (-0.00008 to +0.00020 in.)

Service Limit: 0.010 mm (0.0004 in.)

Fig 3: Checking Difference Between Piston Pin Diameter And Piston Pin Hole Diameter In Piston
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the piston pin-to-connecting rod clearance.
NOTE: When replacing the connecting rod, also replace the piston pin as a set.

Piston Pin-to-Connecting Rod Clearance

Standard (New): 0.018-0.035 mm

(0.0007-0.0014 in.)

Service Limit: 0.04 mm (0.0016 in.)

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