Valve Clearance: Specifications

GENERAL SPECIFICATIONS

Valve Train
Valve Guide Bore Diameter
Intake and Exhaust 7.017 - 7.042 mm (0.2762 - 0.2772 inch)
Valve Seats
Width Intake and Exhaust 2.0 - 2.5 mm (0.078 - 0.098 inch)
Angle 44.5 Degrees
Runout (T.I.R.) 0.035 mm (0.0013 inch)
Gasket Surface Flatness 0.08 mm (0.003 inch) over 152.0 mm (6.00 inch)
Valve Stem to Guide Clearance
Intake 0.026 - 0.071 mm (0.001 - 0.0027 inch)
Exhaust 0.038 - 0.083 mm (0.0015 - 0.0032 inch)
Valve Head Diameter
Intake 40.0 mm (1.57 inch)
Exhaust 33.0 mm (1.30 inch)
Valve Face Runout Limit 0.05 mm (0.002 inch)
Valve Face Angle 45.62 Degrees
Valve Stem
Diameter (Std.)
Intake 6.971 - 6.991 mm (0.2744 - 0.2752 inch)
Exhaust 6.959 - 6.979 mm (0.2739 - 0.2747 inch)
Oversize
Intake 8.340 - 8.320 mm (0.3283 - 0.3276 inch)
Exhaust 8.328 - 8.308 mm (0.3279 - 0.3271 inch)
Oversize
Intake 8.720 - 8.700 mm (0.3433 - 0.3425 inch)
Exhaust 8.708 - 8.688 mm (0.3428 - 0.3420 inch)
Valve Springs
Valve Open to Maximum Lift 912 N @ 29.74 mm (1.17 inch)
Valve Closed 304 N @ 40.52 mm (1.60 inch)
Free Length (Approximate) 46.4 mm (1.89 inch)
Installed Spring Height 44.17 - 41.98 mm (1.736 - 1.650 inch)
Service Limit 10% Force Loss @ Specified Height