Piston Ring, Engine

PISTON RING GAP & GROOVE CLEARANCE

Piston Ring End Gap
First Compression Ring 0.15-0.30 mm (0.006-0.012 in)
Second Compression Ring 0.20-0.45 mm (0.008-0.018 in)
Oil Control Ring - Rails 0.15-0.51 mm (0.006-0.020 in)

Piston Ring to Groove Clearance
First Compression Ring 0.04-0.08 mm (0.0015-0.0031 in)
Second Compression Ring 0.030-0.070 mm (0.0012-0.0030 in)
Oil Control Ring 0.027-0.176 mm (0.0011-0.0069 in)