Piston Ring, Engine

Piston ring
Groove clearance
No. 1 ring 0.17 to 0.22 mm (0.0067 to 0.0087 in.)
No. 2 ring 0.17 to 0.21 mm (0.0067 to 0.0083 in.)
Oil ring 0.21 to 0.29 mm (0.0083 to 0.0114 in.)
End gap
No. 1 ring
Standard 0.22 to 0.32 mm (0.0087 to 0.0126 in.)
No. 2 ring
Standard 0.50 to 0.60 mm (0.0197 to 0.0236 in.)
Oil ring
Standard 0.10 to 0.35 mm (0.0039 to 0.0138 in.)
No. 1 ring
Maximum 0.89 mm (0.0350 in.)
No. 2 ring
Maximum 1.35 mm (0.0531 in.)
Oil ring
Maximum 0.73 mm (0.0287 in.)