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 ring groove clearance
No.1 0.02 - 0.07 mm (0.0008 - 0.0028 inch)
No.2 0.02 - 0.06 mm (0.0008 - 0.0024 inch)
Oil 0.07 - 0.15 mm (0.0028 - 0.0060 inch)
Piston ring end gap
Standard
No. 1 0.30 - 0.40 mm (0.0118 - 0.0157 inch)
No.2 0.40 - 0.50 mm (0.0157 - 0.0197 inch)
Oil (Side rail) 0.10 - 0.40 mm (0.0039 - 0.0157 inch)
Maximum
No.1 1.0 mm (0.039 inch)
No.2 1.1 mm (0.043 inch)
Oil (Side rail) 1.0 mm (0.039 inch)