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)

Or, hide this message: temporarily or permanently

Valve Spring

Free Length
Standard
Intake [01]
Exhaust [02]
Service Limit
Intake [03]
Exhaust 1.612 inches
[01] -- Outer Nihon Hatsujo, 1.616 inches; inner Nihon Hatsujo, 1.424 inches; Chuo Hatsujo, 1.425 inches.
[02] -- Nihon Hatsujo, 1.6520 inches; Chuo Hatsujo, 1.6510 inches.
[03] -- Outer Nihon Hatsujo, 1.5850 inches; Chuo Hatsujo & inner Nihon Hatsujo, 1.3900 inches.