Piston Ring, Engine

Piston ring side clearance
Groove 1 0.05 - 0.082 mm (0.002 - 0.003 in)
Groove 2 Mahle 0.04 - 0.072 mm (0.0016 - 0.0028 in)
Groove 2 KS 0.05 - 0.082 mm (0.002 - 0.003 in)
Groove 3 0.023 - 0.137 mm (0.0009 - 0.005 in)

Piston ring End gap
Groove 1 0.20 - 0.45 mm (0.008 - 0.018 in)
Groove 2 0.20 - 0.45 mm (0.008 - 0.018 in)
Groove 3 0.38 - 1.40 mm (0.015 - 0.055 in)