Valve, Intake/Exhaust
DIMENSIONSFace Angle (Intake and Exhaust)
Standard 45.0-45.5°
Service Limit 45.0-45.5°
Valve Tip Protrusion
Standard (New) 48.25-48.75 mm (1.900-1.919 inches)
Service Limit (Maximum) 48.80 mm (1.921 inches)
Outer Diameter
Intake Stem
Standard (New) 6.949-6.962 mm (0.2736-0.2741 inches)
Service Limit (Minimum) 6.935 mm (0.273 inches)
Exhaust Stem
Standard (New) 6.931-6.950 mm (0.2736-0.2740 inches)
Service Limit (Minimum) 6.915 mm (0.272 inches)
Total Length
Intake
Standard (New) 138.53-139.05 mm (5.45-5.47 inches)
Service Limit (Maximum) 138.48-139.10 mm (5.45-5.48 inches)
Exhaust
Standard (New) 138.73-139.25 mm (5.46-5.48 inches)
Service Limit (Maximum) 138.68-139.30 mm (5.45-5.48 inches)
Head Diameter
Intake
Standard (New) 39.87-40.13 mm (1.5699-1.5799 inches)
Exhaust
Standard (New) 33.87-34.13 mm (1.3335-1.3437 inches)
Margin Width
Intake
Standard (New) 0.96-1.11 mm (0.0378-0.0496 inches)
Service Limit (Minimum) 0.90 mm (0.035 inches)
Exhaust
Standard (New) 1.12-1.27 mm (0.0441-0.0559 inches)
Service Limit (Minimum) 1.00 mm (0.039 inches)