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

Free Length (Approx) Intake and Exhaust 1.9134 inch
Spring Force (Valve Closed) Intake and Exhaust 70.92722 - 79.24515 lbs. @ 1.6099 inch
Spring Force (Valve Open) Intake and Exhaust 176.6998 - 193.3357 lbs. @ 1.167 inch
Number of Coils Intake and Exhaust 6.69
Wire Diameter Intake and Exhaust 0.1685 - 0.1715 inch
Installed Height
Spring Seat to Bottom of RetainerNominal
Intake 1.613 inch
Exhaust 1.606 inch