Piston Ring, Engine

Piston Piston Bore Clearance - Production 0.018-0.061 mm (0.0007-0.0024 inch)
Piston Bore Clearance - Service 0.075 mm - Maximum (0.0029 inch - Maximum)
Piston Rings - End Gap Measured inch Cylinder Bore
Piston Compression Ring Gap - Production-Top Groove 0.25-0.40 mm (0.010-0.016 inch)
Piston Compression Ring Gap - Production-2nd Groove 0.38-0.58 mm (0.015-0.023 inch)
Piston Compression Ring Gap - Service-Top Groove 0.25-0.50 mm (0.010-0.020 inch)
Piston Compression Ring Gap - Service-2nd Groove 0.38-0.80 mm (0.015-0.031 inch)
Piston Compression Ring Groove Clearance - Production-Top 0.030-0.070 mm (0.0012-0.0027 inch)
Piston Compression Ring Groove Clearance - Production- 0.040-0.080 mm (0.0015-0.0031 inch)
Piston Compression Ring Groove Clearance - Service 0.030-0.085 mm (0.0012-0.0033 inch)
Piston Oil Ring Gap - Production 0.25-0.76 mm (0.010-0.029 inch)
Piston Oil Ring Gap - Service 0.005-0.090 mm (0.0002-0.0035 inch)
Piston Oil Ring Groove Clearance - Production 0.046-0.196 mm (0.0018-0.0077 inch)
Piston Oil Ring Groove Clearance - Service 0.046-0.200 mm (0.0018-0.0079 inch)