Piston Ring, Engine

PISTON RING
Piston 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 0.03 to 0.11 mm (0.0011 to 0.0043 in.)

Specified end gap
No. 1 0.30 to 0.95 mm (0.0118 to 0.0374 in.)
No. 2 0.50 to 1.05 mm (0.0197 to 0.0413 in.)
Oil (side rail) 0.15 to 1.00 mm (0.0059 to 0.0394 in.)