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

Valve Seating Surface, Angle 45.75 Degrees (deg)
Width, Exhaust 0.0512 - 0.0669 Inch (in)
Intake 0.0165 - 0.0323 Inch (in)
Runout - Maximum 0.0020 Inch (in)
Relief, Angle 20 Degrees (deg)
Width, Exhaust 0.0063 - 0.0142 Inch (in)
Intake 0.0043 - 0.0118 Inch (in)
Runout- Maximum 0.0020 Inch (in)
Undercut Angle, Exhaust 65 Degrees (deg)
Intake 65 Degrees (deg)