Piston Ring, Engine

Piston Ring
Ring-to-groove clearance
Top
Standard or new 0.045-0.090 mm (0.0018-0.0035 in.)
Service limit 0.13 mm (0.005 in.)
Second
Standard or new 0.040-0.065 mm (0.0016-0.0026 in.)
Service limit 0.13 mm (0.005 in.)
Oil
Standard or new 0.020-0.050 mm (0.0008-0.0020 in.)
Service limit 0.08 mm (0.003 in.)

Ring end gap
Top
Standard or new 0.20-0.30 mm (0.008-0.012 in.)
Service limit 0.60 mm (0.024 in.)
Second
Standard or new 0.40-0.50 mm (0.016-0.020 in.)
Service limit 0.75 mm (0.030 in.)
Oil
Standard or new 0.10-0.30 mm (0.004-0.012 in.)
Service limit 0.80 mm (0.031 in.)