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





Piston ring groove width

No.1 1.23 - 1.25 mm ( 0.0484 - 0.0492 in)
No.2 1.23 - 1.25 mm ( 0.0484 - 0.0492 in)

Piston ring side clearance

No.1 0.04 - 0.08 mm ( 0.0016 - 0.0031 in)
No.2 0.04 - 0.08 mm ( 0.0016 - 0.0031 in)
Oil ring 0.06 - 0.15 mm (0.0024 - 0.0059 in)






Piston ring end gap

No.1 0.17 - 0.32 mm (0.0067 - 0.0126 in)
No.2 0.37 - 0.52 mm (0.0146 - 0.0205 in)
Oil ring 0.20 - 0.70 mm (0.0079 - 0.0276 in)