Operation CHARM: Car repair manuals for everyone.

Piston Ring

Compression Ring (Top) to Ring Groove Clearance 0.04 - 0.072 Millimeter (mm)
Compression Ring (Bottom) to Ring Groove Clearance 0.30 - 0.50 Millimeter (mm)
Oil Ring (Steel Rail) Clearance 0.40 - 1.40 Millimeter (mm)
Ring Gap Compression (Top) 0.20 - 0.25 Millimeter (mm)
Compression (Bottom) 0.012 - 0.020 Inch (in)
Oil ring (Steel Rail) 0.016 - 0.035 Inch (in)
Ring Width Upper Compression Ring 0.011811 - 0.019685 Inch (in)
Lower Compression Ring 0.011811 - 0.019685 Inch (in)
Oil Control Ring 0.015748 - 0.055118 Inch (in)