Piston Ring, Engine

Piston Rings
Piston Ring End Gap - First Compression Ring 0.20-0.40 mm (0.008-0.016 in.)
Piston Ring End Gap - Second Compression Ring 0.40-0.60 mm (0.016-0.024 in.)
Piston Ring End Gap - Oil Control Ring - Rails 0.25-0.75 mm (0.010-0.030 in.)
Piston Ring to Groove Clearance - First Compression Ring 0.04-0.08 mm (0.0015-0.0031 in.)
Piston Ring to Groove Clearance - Second Compression Ring 0.030-0.070 mm (0.0012-0.0028 in.)
Piston Ring to Groove Clearance - Oil Control Ring 0.030-0.130 mm (0.0012-0.0051 in.)
Piston Ring Thickness - First Compression Ring 1.170-1.190 mm (0.0461-0.0469 in.)
Piston Ring Thickness - Second Compression Ring 1.170-1.190 mm (0.0461-0.0469 in.)
Piston Ring Thickness - Oil Control Ring - Rail - Maximum 0.43 mm (0.0169 in.)
Piston Ring Thickness - Oil Control Ring - Spacer 1.900-1.980 mm (0.0748-0.0780 in.)