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 GAP:
Top Ring:
Standard (New) 0.20 - 0.35 mm (0.008 - 0.0014 inch)
Service Limit 0.60 mm (0.024 inch)
Second Ring:
Standard (New) 0.40 - 0.55 mm (0.016 - 0.022 inch)
Service Limit 0.70 mm (0.028 inch)
Oil Ring:
Standard (New) 0.20 - 0.70 mm (0.08 - 0.028 inch)
Service Limit 0.80 mm (0.031 inch)

RING TO GROOVE CLEARANCE
Top Ring:
Standard (New) 0.035 - 0.060 mm (0.0014 - 0.0024 inch)
Service Limit 0.13 mm (0.005 inch)
Second Ring:
Standard (New) 0.30 - 0.055 mm (0.0012 - 0.0022 inch)
Service Limit 0.13 mm (0.005 inch)