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 Spring: Service and Repair

Special Tools:






Removal and Installation
1. Remove the hydraulic lash adjusters.
2. Pressurize the cylinder using compressed air.





3. Using the special tool, remove the key, retainer, and valve spring.
4. To install, reverse the removal procedure.