Piston Ring, Engine

Piston Ring
Piston ring groove clearance
No.1 0.03 to 0.08 mm (0.0012 to 0.0031 in.)
No.2 0.02 to 0.06 mm (0.0008 to 0.0024 in.)
Oil (Side rail) 0.03 to 0.11 mm (0.0012 to 0.0043 in.)

End gap
No.1 0.30 to 0.40 mm (0.0118 to 0.0157 in.)
Maximum 0.95 mm (0.0374 in.)
No.2 0.50 to 0.60 mm (0.0197 to 0.0236 in.)
Maximum 1.05 mm (0.0413 in.)
Oil (Side rail) 0.15 to 0.40 mm (0.0059 to 0.0157 in.)
Maximum 1.00 mm (0.0394 in.)