Operation CHARM: Car repair manuals for everyone.
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Piston Ring, Engine

Piston ring gap
top upper compression ring
Standard 0.23 - 0.52 Millimeter (mm)
LImit 0.80 Millimeter (mm)
intermediate compression ring
Standard 0.49 - 0.78 Millimeter (mm)
Limit 1.00 Millimeter (mm)
Oil control (steel ring)
Standard 0.23 - 0.66 Millimeter (mm)
Limit 1.00 Millimeter (mm)
Piston ring side clearance
Top Upper And Intermediate Compression Ring 0.025 - 0.066 Millimeter (mm)
Piston ring oil control (pack) ring 0.004 - 0.170 Millimeter (mm)
Piston ring width
top upper and intermediate compression ring 1.17 - 1.19 Millimeter (mm)
Oil control (pack) ring 2.854 - 3.008 Millimeter (mm)