Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Piston Ring, Engine

GENERAL SPECIFICATIONS

Piston Rings
Piston Ring End Gap First Compression Ring 0.20 0.40 mm (0.008 0.016 in)
Piston Ring End Gap Second Compression Ring 0.35 0.55 mm (0.014 0.022 in)
Piston Ring End Gap Oil Control Ring Rails 0.25 0.76 mm (0.010 0.030 in)
Piston Ring to Groove Clearance First Compression Ring 0.04 0.08 mm (0.0015 0.0031 in)
Piston Ring to Groove Clearance Second Compression Ring 0.030 0.069 mm (0.0012 0.0027 in)
Piston Ring to Groove Clearance Oil Control Ring 0.090 0.106 mm (0.0035 0.0042 in)
Piston Ring Thickness First Compression Ring 1.170 1.190 mm (0.0461 0.0469 in)
Piston Ring Thickness Second Compression Ring 1.471 1.490 mm (0.0579 0.0587 in)
Piston Ring Thickness Oil Control Ring Rail Maximum 0.43 mm (0.0169 in)
Piston Ring Thickness Oil Control Ring Spacer 1.574 1.651 mm (0.0620 0.0650 in)
Pistons and Pins Piston Piston Diameter 14.5 mm up 85.967 85.982 mm (3.3845 3.3851 in)