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)

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Valve Seat




Fig. 4 Valve Seats, Refacing:




Exhaust Valve Intake Valve
a = 33.2 mm 35.2 mm
b = 30.4 mm 32.8 mm
c = 2.4 mm .0 mm
d = 0.5-1.5 mm 0.5-1.5 mm
45° = valve seat angle
15° = correction angle