Piston Ring, Engine

RING GROOVE CLEARANCE
Ring groove clearance:
No. 1: 0.02 to 0.07 mm (0.0008 to 0.0028 in.)
No. 2: 0.02 to 0.06 mm (0.0008 to 0.0024 in.)
Oil: 0.07 to 0.15 mm (0.0028 to 0.0060 in.)

PISTON RING END GAP
Standard end gap:
No. 1: 0.30 to 0.40 mm (0.0118 to 0.0157 in.)
No. 2: 0.40 to 0.50 mm (0.0157 to 0.0197 in.)
Oil (Side rail): 0.10 to 0.40 mm (0.0039 to 0.0157 in.)

Maximum end gap:
No. 1: 1.0 mm (0.039 in.)
No. 2: 1.1 mm (0.043 in.)
Oil (Side rail): 1.0 mm (0.039 in.)