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 Lifter Installation

1. Dip the valve lifters in prelube GM P/N 12345501 or equivalent.





2. Install the valve lifters.
3. Install the valve lifter guides.
4. Install the valve lifter guide bolts.
^ Tighten the valve lifter guide bolts to 30 Nm (22 ft. lbs.).

NOTICE: Refer to Fastener Notice in Service Precautions.