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







Valve Springs Compression Pressure (Kg [Lb] @ Spec. Length)
Loaded 800.6 N (180 lbs.) @ 29.5 mm (1.16 in.)
Unloaded 288.1 N (65 lbs.) @ 40.1 mm (1.58 in.)
Valve Springs Free Length (Approximate) 46.7 mm (1.84 in.)
Valve Springs Assembled Height 40.08 mm (1.58 in.)
Valve Springs Service Limit 10% Force Loss @ Specified Height