Engine Block: Inspection: Notes

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

Fig 2: Attaching Dial Indicator To Piston Pin Diameter
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 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.
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.