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






THICKNESS:
Top Ring: 1.728 - 1.740 mm (0.0680 - 0.0685 inch)
Second Ring: 1.980 - 1.996 mm (0.0780 - 0.0779 inch)
Oil Scraper Ring: 2.934 - 3.052 mm (0.1155 - 0.1202 inch)

SIDE CLEARANCE:
First Ring: 0.040 - 0.072 mm (0.0016 - 0.0028 inch)
Second Ring: 0.040 - 0.072 mm (0.0016 - 0.0028 inch)

END GAP:
First Ring: 0.300 - 0.500 mm (0.0118 - 0.0197 inch)
Second Ring: 0.300 - 0.450 mm (0.0118 - 0.0177 inch)
Oil Scraper Ring: 0.380 - 1.400 mm (0.0149 - 0.0551 inch)