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, Intake/Exhaust

Intake Stem Outer Diameter Standard 0.2736 - 0.2741 Inch (in)
Service Limit 0.273 Inch (in)
Exhaust Stem Outer Diameter Standard 0.2726 - 0.274 Inch (in)
Service Limit 0.272 Inch (in)
Intake Stem to Guide Clearance Standard 0.001 - 0.0025 Inch (in)
Service Limit 0.004 Inch (in)
Exhaust Stem to Guide Clearance Standard 0.0015 - 0.0032 Inch (in)
Service Limit 0.005 Inch (in)
Intake Total Length Standard 5.45 Inch (in)
Service Limit 5.45 - 5.48 Inch (in)
Exhaust Total Length Standard 5.46 - 5.48 Inch (in)
Service Limit 5.45 - 5.48 Inch (in)
Intake Head Diameter Standard 1.5699 - 1.5799 Inch (in)
Exhaust Head Diameter Standard 1.3335 - 1.3437 Inch (in)
Intake Margin Width Standard 0.0378 - 0.0496 Inch (in)
Service Limit 0.035 Inch (in)
Exhaust Margin Width Standard 0.0441 - 0.0559 Inch (in)
Service Limit 0.039 Inch (in)
Face Angle (Intake and Exhaust) Standard 44.75 - 45.25 Degrees (deg)
Service Limit 45.0 - 45.5 Degrees (deg)
Valve Tip Protrusion Standard 1.900 - 1.919 in.
Service Limit 1.921 in.