Piston, Pin, and Connecting Rod Replacement: Inspection

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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): 21.962-21.965 mm (0.8646-0.8648 in.)
- Service Limit: 21.954 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: Setting Zero 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 on the piston.
Piston Pin-to-Piston Clearance
- Standard (New): -0.0050 to +0.0010 mm (-0.00020 to +0.00004 in.)
- Service Limit: 0.004 mm (0.0002 in.)
Fig 3: Checking Difference Between Piston Pin Diameter And 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): 0.005-0.014 mm (0.0002-0.0006 in.)
- Service Limit: 0.019 mm (0.0007 in.)
Fig 4: Measuring Piston Pin-To-Connecting Rod Clearance
Courtesy of AMERICAN HONDA MOTOR CO., INC.