SERVICE MANUAL CYLINDER HEAD & VALVES Section 3 SPECIFICATIONS CHART 400 Series Values Dimension Title Intake Exhaust Number of Valves per Cylinder 1 1 Valve Seat Runout in Cylinder Head 0.05 mm = (0.002 in) 0.05 mm = (0.002 in) Valve Face Runout 0.038 mm = (0.0015 in) 0.038 mm = (0.0015 in) Valve Stem Diameter 9.444 mm = (0.3718 in) 9.444 mm = (0.3718 in) 9.462 mm (0.3725 in) 9.462 mm (0.3725 in) Valve Face Angle 3000’-3015’ 4500’-4515’ Valve Seat Insert Angle 3000’-3015’ 4500’-4515’ Valve Seat Width 1.91 mm = (0.075 in) 1.91 mm = (0.075 in) 2.26 mm (0.085 in) 2.26 mm (0.085 in) Minimum Valve Face Margin 2.24 mm = (0.088 in) 1.14 mm = (0.045 in) Valve Head Recession From Face 0.00 mm = (0.000 in) 0.00 mm = (0.000 in) of Cylinder Head 0.36 mm (0.014 in) 0.36 mm (0.014 in) Valve Seat Insert Counterbore 50.70 mm = (1.996 in) 41.25 mm = (1.624 in) Diameter 50.72 mm (1.997 in) 41.28 mm (1.625 in) Depth of Valve Seat Insert 12.93 mm = (0.509 in) 11.56 mm = (0.455 in) Counterbore 12.98 mm (0.511 in) 11.66 mm (0.459 in) Valve Guide Type Replaceable Replaceable Valve Guide Length 69.85 mm = (2.750 in) 69.85 mm = (2.750 in) Valve Guide I.D. 9.500 mm = (0.3740 in) 9.500 mm (0.3740 in) (Reamed After Assembly) 9.525 mm (0.3750 in) 9.525 mm (0.3750 in) Valve Guide O.D. 15.900 mm = (0.6260 in) 15.900 mm = (0.6260 in) 15.913 mm (0.6265 in) 15.913 mm (0.6265 in) Maximum Allowable Stem Clearance in Guide 0.15 mm = (0.006 in) 0.15 mm = (0.006 in) Before Replacing Valve Guide Bore Diameter (Ream Through After 9.4107 mm = (0.3750 in) 9.4107 mm = (0.3750 in) Assembly) 9.4996 mm (0.3740 in) 9.4996 mm (0.3740 in) Valve Guide Interference Fit 0.0203 mm = (0.0008 in) 0.0203 mm = (0.0008 in) Dimension 0.0660 mm (0.0026 in) 0.0660 mm(0.0026 in) Valve Guide Height From Cylinder 30.66 mm = (1.207 in) 32.69 mm = (1.287 in) Head Surface 31.17 mm (1.227 in) 33.20 mm (1.307 in) CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 7