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



Minimum Dimensions:

Short Intake Valve mm 31.8

Long Intake Valve mm 10.2

Short Exhaust Valve mm 31.8

Long Exhaust Valve mm 10.2

Cracks Between The Valve Seats Or Between A Valve Seat And The Spark Plug Thread

width of max. 0.5 mm