Measuring Piston Ring End Gap

Important: Do not attempt to file the end of the piston ring for fit in the cylinder bore. Important: Measure the piston ring in the cylinder in which the piston ring will be used.





1. Place the piston ring into the cylinder bore.
2. Push the piston ring into the bore 6.5 mm (0.25 inch) below the piston ring travel area.
3. Insert a feeler gauge and measure the piston ring end gap.
- The proper top compression ring end gap is 0.23 - 0.38 mm (0.009 - 0.0149 inch).
- The proper second compression ring end gap is 0.44 - 0.64 mm (0.0173 - 0.0251 inch).
- The proper oil control ring end gap is 0.18 - 0.69 mm (0.007 - 0.0271 inch).