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 Guide Inner Diameter

VALVE GUIDE INNER DIAMETER

1. Use a ball gauge to determine the inner diameter of the valve guides in 2 directions at the top, middle and bottom of the valve guide.

NOTE:Valve guides tend to wear in an hourglass pattern The ball guide can be inserted into the combustion chamber side of the valve guide, if necessary.

2. Measure the ball gauge with a micrometer.

3. If the valve guide is not within specifications, install a new cylinder head assembly.