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

Valve Seat

Seat Angle Standard 45 Degrees (deg)
Seat Diameter Intake Standard 1.299 Inch (in)
Exhaust Standard 1.102 Inch (in)
Runout Maximum 0.002 Inch (in)
Valve Seat Width Intake and Exhaust Standard 0.035-0.051 Inch (in)
Intake Service Limit 0.079 Inch (in)
Exhaust Service Limit 0.098 Inch (in)