Piston Ring, Engine

Piston ring
Ring-to-groove clearance
Top
Standard or new 0.065-0.090 mm (0.0026-0.0035 in.)
Service limit 0.15 mm (0.006 in.)
Second
Standard or new 0.030-0.055 mm (0.0012-0.0022 in.)
Service limit 0.13 mm (0.005 in.)
Ring end gap
Top
Standard or new 0.15-0.30 mm (0.006-0.012 in.)
Service limit 0.60 mm (0.024 in.)
Second
Standard or new 0.35-0.50 mm (0.014-0.020 in.)
Service limit 0.65 mm (0.026 in.)
Oil
Standard or new 0.20-0.70 mm (0.008-0.028 in.)
Service limit 0.80 mm (0.031 in.)