Piston Ring: Specifications

Piston and Connecting Rods
Piston Ring Thickness, Top 1.170-1.190 mm (0.0461-0.0469 inches)
Piston Ring Thickness, Second 1.471-1.490 mm (0.0579-0.0587 inches)
Piston Ring Thickness, Oil Control Rail 0.43 max
Piston Ring Thickness, Oil Control Spacer 1.574-1.651 mm
Ring-to-Groove Clearance, Top 0.04-0.08 mm
Ring-to-Groove Clearance, Second 0.030-0.069 mm (0.0012-0.0027 inches)
Ring-to-Groove Clearance, Oil Control 0.090-0.106 mm
Ring Gap, Top 0.20-0.40 mm (0.008-0.016 inches)
Ring Gap, Second 3.0.35-0.55 mm (0.014-0.022 inches)
Ring Gap, Oil Rails 0.25-0.76 mm (0.010-0.030 inches)

Engine Block/Piston Ring
Compression Rings Thickness 1.5 mm 0.0590 inches
Ring Groove Clearance 0.02-0.04 mm 0.0008-0.0015 inches
King Gap 0.30-0.50 mm 0.0118-0.0196 inches
Oil Ring Thickness 3.0 mm 0.1181 inches
King Groove Clearance 0.01-0.03 mm 0.0004-0.0012 inches
Ring Gap 0.40-1.40 mm 0.0157-0.0551 inches

Piston Ring
Compression Rings Thickness 1.5 mm 0.0590 inches
Ring Groove Clearance 0.02-0.04 mm 0.0008-0.0015 inches
King Gap 0.30-0.50 mm 0.0118-0.0196 inches
Oil Ring Thickness 3.0 mm 0.1181 inches
King Groove Clearance 0.01-0.03 mm 0.0004-0.0012 inches
Ring Gap 0.40-1.40 mm 0.0157-0.0551 inches