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, Intake/Exhaust

Valves
Face Angle - Intake and Exhaust 44.5 - 45°
Head Diameter
Intake 34.67 - 34.93 mm (1.364 - 1.375 in.)
Exhaust 28.32 - 28.52 mm (1.114 - 1.122 in.)
Valve Length (Overall)
Intake 112.76 - 113.32 mm (4.439 - 4.461 in.)
Exhaust 110.89 - 111.69 mm (4.365 - 4.397 in.)
Valve Stem Diameter
Intake 5.934 - 5.952 mm (0.2337 - 0.2344 in.)
Exhaust 5.906 - 5.924 mm (0.2326 - 0.2333 in.)

Valve Margin
Intake 1.2 - 1.7 mm (0.047 - 0.066 in.)
Service Limit 0.95 mm (1/32 in.)
Exhaust 0.985 - 1.315 mm (0.038 - 0.051 in.)
Service Limit 1.05 mm (3/64 in.)