Operation CHARM: Car repair manuals for everyone.

Piston Ring

Piston Rings End Gap Compression Rings 1st Ring 0.20-0.35 Millimeter (mm)
2nd Ring 0.30-0.50 Millimeter (mm)
Oil Ring --- 0.25-0.76 Millimeter (mm)
Side Clearance Compression Rings 1st & 2nd Rings 0.02-0.04 Millimeter (mm)
Oil Ring 0.01-0.03 Millimeter (mm)