Piston Ring, Engine

COMPRESSION RINGS
Groove Clearance:
Production Top 0.050-0.090 mm (0.0019-0.0035 inches)
Production 2nd 0.050-0.090 mm (0.0019-0.0035 inches)
Service Limit (Maximum) 0.107 mm (0.0042 inches)
Gap-Production:
Top 0.25-0.40 mm (0.010-0.016 inches)
2nd (Maximum) 0.46-0.66 mm (0.018-0.026 inches)
Gap-Service Limit (Maximum) 0.88 mm (0.035 inches)

OIL RING
Groove Clearance:
Production 0.051-0.17 mm (0.002-0.007 inches)
Service Limit (Maximum) 0.20 mm (0.008 inches)
Gap-Production 0.25-0.76 mm (0.010-0.030 inches)
Gap-Service Limit (Maximum) 1.65 mm (0.065 inches)