Piston Ring, Engine

Piston Ring Gap and Groove Clearance

Side Clearance
No 1 Ring 0.03 - 0.07 mm (0.0012 - 0.0027 in.)
Limit 0.1 mm (0.004 in.)
No 2 Ring 0.03 - 0.07 mm (0.0012 - 0.0027 in.)
Limit 0.1 mm (0.004 in.)
Oil Ring 0.06 - 0.15 mm (0.0024 - 0.0059 in.)
Limit 0.2 mm (0.008 in.)

End Gap
No 1 Ring 0.17 - 0.32 mm (0.0067 - 0.0126 in.)
Limit 0.6 mm (0.0236 in.)
No 2 Ring 0.32 - 0.47 mm (0.0126 - 0.0185 in.)
Limit 0.7 mm (0.0275 in.)
Oil Ring 0.20 - 0.70 mm (0.0078 - 0.0275 in.)
Limit 0.8 mm (0.0315 in.)

Ring Groove Width
No 1 Ring Groove 1.22 - 1.24 mm (0.0480 - 0.0488 in)
Limit 0.1 mm (0.004 in.)
No 2 Ring Groove 1.22 - 1.24 mm (0.0480 - 0.0488 in)
Limit 0.1 mm (0.004 in.)
Oil Ring Groove 2.01 - 2.03 mm (0.0791 - 0.0799 in.)
Limit 2.05 mm (0.0807 in.)