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

Piston Rings:
Compression Ring Width:
Top Ring 1.170 - 1.190 mm (0.0461 - 0.0469 inch)
Second Ring 1.470 - 1.490 mm (0.0578 - 0.0586 inch)
Compression Ring Gap:
Top Ring 0.15 - 0.30 mm (0.006 - 0.012 inch)
2nd Ring 0.25 - 0.40 mm (0.0098 - 0.0160 inch)
Compression Ring Side Clearance In The Groove:
Top Ring 0.040 - 0.080 mm (0.0016 - 0.0031 inch)
Oil Ring Gap 0.25 - 0.76 mm (0.0098 - 0.0299 inch)
Oil Rail Width 0.385 - 0.440 mm (0.0151 - 0.0173 inch)