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 rings-ring gap -compression (top) (inch) 1.0 Max (0.0394)
Piston rings-ring gap -compression (top) (inch) 1.0 Max (0.0394)
Oil ring-side clearance (inch) 1.25 Max (0.05)
Oil ring-compression (top) (inch) 0.0016-0.0031
Oil ring-compression (top) (inch) 0.0012-0.00031
Oil ring snug fit
Oil ring-service limit (inch) 015 Max (0.0006)
Ring gap-compression (top) (inch) 0.01-0.02
Ring gap-compression (bottom) (inch) 0.01-0.02
Ring gap-oil ring (steel rail) (inch) 0.006-0.026