Piston Ring, Engine

Piston ring
No.1 Ring groove clearance 0.030 to 0.080 mm (0.0012 to 0.0031 in.)
No.2 Ring groove clearance 0.020 to 0.060 mm (0.0008 to 0.0024 in.)
No.1 Standard end gap 0.300 to 0.500 mm (0.0118 to 0.0197 in.)
No.2 Standard end gap 0.400 to 0.600 mm (0.0157 to 0.0236 in.)
Oil (side rail) Standard end gap 0.150 to 0.500 mm (0.0059 to 0.0197 in.)
No.1 Maximum end gap 1.10 mm (0.0433 in.)
No.2 Maximum end gap 1.20 mm (0.0472 in.)
Oil (side rail) Maximum end gap 1.10 mm (0.0433 in.)