Piston Ring: Testing and Inspection

^ Piston ring end gap by inserting each piston ring into cylinder bore, positioning ring at a point 120 mm (4.72 inch) from the top. Use the top of a piston to push ring in squarely. Measure ring end gap with a feeler gage. The cylinder bore top must be free of carbon before inserting the piston ring.
- Piston upper compression ring end gap specification is 0.20 to 0.35 mm (0.0079 to 0.0137 inch).
- Piston lower compression ring end gap specification is 0.20 to 0.35 mm (0.0079 to 0.0137 inch).
- Piston oil ring end gap specification is 0.20 to 0.70 mm (0.0079 to 0.0275 inch).