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-Inspection

Valve-Inspection





1. Inspect the following valve areas:
1 the end of the stem for grooves or scoring
2 the valve face and the edge for pits, grooves or scores
3 the valve head for signs of burning, erosion, warpage and cracking
4 the valve margin for wear