Piston Ring, Engine

Ring-to-ring clearance
Top
Standard 0.035-0.065 mm (0.0014-0.0025 in)
Maximum 0.15 mm (0.0059 in)
Second
Standard 0.030-0.070 mm (0.0012-0.0027 in)
Maximum 0.15 mm (0.0059 in)
Oil
Standard 0.060-0.150 mm (0.0024-0.0059 in)
Maximum 0.20 mm (0.008 in)
End gap [measured in cylinder]
Top 0.15-0.30 mm (0.006-0.011 in)
Second 0.30-0.45 mm (0.012-0.017 in)
Oil 0.20-0.70 m (0.008-0.027 in)
Maximum 1.0 mm (0.039 in)