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

Valve spring free length (approx.) 45.5 mm (1.6598 inch)
Valve spring squareness 2 degrees
Valve spring compression pressure 711.47 N @ 26.19 mm (159.9 ft. lbs. - 1.031 inch)
Valve spring installed height 36.14 mm (1.4228 inch)
Valve spring installed pressure 289.1 N @ 36.14 mm (64.99 ft. lbs. - 1.4228 inch)
Valve spring installed pressure-service limit 10% pressure loss 28.02 mm (1.103 inch)