Dimension & Clearance Specifications - Valves

Valve Guide Inside Diameter 5.500-5.512 mm (0.2165-0.2170 inch)
Valve Head Thickness:
Intake Valves (Standard) 1.0 mm (0.039 inch)
Intake Valves (Minimum Limit) 0.6 mm (0.02 inch)
Exhaust Valves (Standard) 1.2 mm (0.047 inch)
Exhaust Valves (Minimum Limit) 0.7 mm (0.027 inch)
Valve Seating Contact Width:
Intake and Exhaust 1.30-1.50 mm (0.0512-0.0590 inch)
Valve Stem Outside Diameter:
Intake Valves 5.457-5.480 mm (0.2148-0.2157 inch)
Exhaust Valves 5.440-5.455 mm (0.2142-0.2148 inch)
Valve Stem Radial Runout (Minimum):
Intake and Exhaust 0.08 mm (0.003 inch)
Valve Stem-to-Valve Guide Clearance:
Intake Valves (Standard) 0.020-0.055 mm (0.0008-0.0022 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 Spring Free Length:
Standard 42.29 mm (1.6649 inch)
Limit (Minimum) 41.00 mm (1.6142 inch)
Valve Spring Preload:
Standard 20.9-23.5 kg at 32.6 mm (46.1-51.8 lb. at 1.28 inch)
Limit (Minimum) 18.7 kg at 32.6 mm (41.2 lb at 1.28 inch)
Valve Spring Squareness Deviation (Maximum) 2.0 mm (0.079 inch)