Piston Ring, Engine

Piston rings
New ring to groove clearance:
Top compression ring 0.05 - 0.08 mm (0.0020 - 0.0031 inch)
2nd compression ring 0.04 - 0.07 mm (0.0012 - 0.0024 inch)
Oil control ring 0.010 - 0.180 mm (0.0004 - 0.0071 inch)

Ring fitted gap 20 mm (0.75 inch) from top of bore:
Top compression ring 0.20 - 0.35 mm (0.008 - 0.014 inch)
2nd compression ring 0.28 - 0.45 mm (0.011 - 0.018 inch)
Oil control ring 0.25 - 1.00 mm (0.010 - 0.039 inch)

Piston ring width:
Top compression ring 3.1 ± 0.15 mm (0.122 ± 0.006 inch)
2nd compression ring 3.15 - 3.45 mm (0.124 - 0.136 inch)
Oil control ring 2.286 - 2.438 mm (0.090 - 0.096 inch)