Valve, Intake/Exhaust

Intake Stem Outer Diameter
Standard 6.949-6.962 mm (0.2736-0.2741 in.)
Service Limit 6.935 mm (0.273 in. min.)
Exhaust Stem Outer Diameter
Standard 6.931-6.950 mm (0.2736-0.274 in.)
Service Limit 6.915 mm (0.272 in. min.)
Valve Guide Inner Diameter
Standard 6.987-7.013 mm (0.2751-0.2761 in.)
Service Limit 7.050 mm (0.278 in. max.)
Valve Guide Outer Diameter 11.393-11.407 mm (0.44885-0.4491 in.)
Intake Stem to Guide Clearance
Standard 0.025-0.064 mm 0.001-0.0025 in.)
Service Limit 0.115 mm (0.004 in. max.)
Exhaust Stem to Guide Clearance
Standard 0.037-0.082 mm (0.0015-0.0032 in.)
Service Limit 0.135 mm (0.005 in. max.)
Intake Total Length
Standard 138.53-139.05 mm (5.45-5.47 in.)
Service Limit 138.48-139.10 mm (5.45-5.48 in.)
Exhaust Total Length
Standard 138.73-139.25 mm (5.46-5.48 in.)
Service Limit 138.68-139.30 mm (5.45-5.48 in.)
Intake Head Diameter 39.87-40.13 mm (1.5699-1.5799 in.)
Exhaust Head Diameter 33.87-34.13 mm (1.3335-1.3437 in.)
Intake Margin Width
Standard 0.96-1.11 mm (0.0378-0.0496 in.)
Service Limit 0.90 mm (0.035 in. min.)
Exhaust Margin Width
Standard 1.12-1.27 mm (0.0441-0.0559 in.)
Service Limit 1.00 mm (0.039 in. min.)
Face Angle (Intake and Exhaust)
Standard 45.0-45.5° (44.75-45.25°)
Service Limit 45.0°-45.5° (45.0°-45.5°)
Valve Tip Protrusion
Standard 48.25-48.75 mm (1.900-1.919 in.)
Service Limit 48.80 mm (1.921 in. max.)