Piston Ring, Engine

Piston ring side clearance
Groove 1 0.040 - 0.072 mm (0.0016 - 0.0028 in)
Groove 2 0.030 - 0.062 mm (0.0012 - 0.0024 in)
Groove 3 0.020 - 0.055 mm (0.0008 - 0.0022 in)

Piston ring end gap
Groove 1 0.20 - 0.40 mm (0.008 - 0.016 in)
Wear Limit 0.8 mm (0.032 in)
Groove 2 0.20 - 0.40 mm (0.008 - 0.016 in)
Wear Limit 0.8 mm (0.032 in)
Groove 3 0.30 - 0.60 mm (0.012 - 0.024 in)
Wear Limit 1.2 mm (0.047 in)