Dimension & Clearance Specifications - Piston Rings

Piston Rings (End Gap Measured In Cylinder Bore)
Piston Compression Ring Gap
Production-Top Groove 0.25 - 0.40 mm (0.010 - 0.016)
Production-2nd Groove 0.46 - 0.66 mm (0.018 - 0.026 inch) Max
Piston Compression Ring Gap
Service-Top Groove 0.5 (0.19 inch) Max
Service-2nd Gap 0.8 mm (0.31 inch) Max
Piston Compression Ring Groove Clearance
Production-Top Groove 0.030 - 0.070 mm (0.0012 - 0.0027 inch)
Production-2nd Groove 0.040 - 0.080 mm (0.0015 - 0.0031 inch)
Service 0.085 mm (0.0033 inch) Max
Piston Oil Ring Gap
Production 0.25 - 0.76 mm (0.010 - 0.029 inch)
Service 0.90 mm (0.035 inch) Max
Piston Oil Ring Groove Clearance
Production 0.046 - 0.096 mm (0.0018 - 0.0037 inch)
Service 0.10 mm (0.0039 inch) Max