Valve, Intake/Exhaust

Head Thickness:
Intake Valves (Standard) 0.8 - 1.2 mm (0.03 - 0.047 inch)
Intake Valves (Minimum Limit) 0.6 mm (0.024 inch)
Exhaust Valves (Standard) 0.8 - 1.2 mm (0.03 - 0.047 inch)
Exhaust Valves (Minimum Limit) 0.7 mm (0.027 inch)

Head Angles for Refinishing
Area Above Seat Contact Surface 15°
Seat Contact Surface 45°

Seating Contact Width (All) 1.1 - 1.3 mm (0.0433 - 0.0512 inch)

Valve Stem Outside Diameter:
Intake Valves 5.465 - 5.480 mm (0.2152 - 0.2157 inch)
Exhaust Valves 5.440 - 5.455 mm (0.2142 - 0.2148 inch)

Valve Stem-to-Valve Guide Clearance:
Intake Valves (Standard) 0.020 - 0.047 mm (0.0008 - 0.0018 inch)
Intake Valves (Maximum Limit) 0.070 mm (0.0027 inch)
Exhaust Valves (Standard) 0.045 - 0.072 mm (0.0018 - 0.0028 inch)
Exhaust Valves (Maximum Limit) 0.090 mm (0.0035 inch)

Valve Lash
Cold Adjustment Coolant Temperature 25°C (77°F)
Intake 0.13 - 0.17 mm (0.005 - 0.007 inch)
Exhaust 0.13 - 0.17 mm (0.005 - 0.007 inch)

Hot Adjustment Coolant Temperature 68°C (154°F)
Intake 0.17 - 0.21 mm (0.007 - 0.008 inch)
Exhaust 0.17 - 0.21 mm (0.007 - 0.008 inch)