Cylinder head and Valves/Specifications CTM3274 (01JUL99) 05-4 Saran Liter Engines 060799 PN=41 SPECIFICATIONS DIMENSIONS OF NEW PARTS WEAR TOLERANCE Thickness of new cylinder head . . . . . . . . . . . . . . . . . . . 104.87—105.13 mm (4.129—4.139 in.) Maximum permissible amount to be machined from cylinder head . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.76 mm (0.03 in.) Minimum thickness of cylinder head . . . . . . . . . . . . . . . . 104.11 mm (4.099 in.) Maximum permissible out-of-flat of cylinder head sealing surface . . . . . . . . . . . . . . . . . . . . . . . . . . 0.08 mm (0.003 in.) Combustion face surface finish . . . . . . . . . . . . . . . . . . . approx.
0.0025 mm C.L.A.* (0.0001 in. C.L.A.) Valve stem diameter (standard) Intake valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.864—7.884 mm (0.3096—0.3104 in.) Exhaust valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.848—7.874 mm (0.3090—0.3100 in.) Bore for valve stem . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.912—7.938 mm (0.3115—0.3125 in.) Clearance between bore and valve stem . . . . . . . . . . . . . 0.05 to 0.10 mm 0.15 mm (0.002 to 0.004 in.) (0.006 in.) Valve stem oversize, stem diameter larger than standard by . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.38 mm (0.015 in.) 0.76 mm (0.030 in.) Valve seat angle (intake and exhaust) . . . . . . . . . . . . . . 30˚ Valve face angle (intake and exhaust) . . . . . . . . . . . . . . 29.25˚ Maximum valve seat runout . . . . . . . . . . . . . . . . . . . . . 0.08 mm (0.003 in.) Maximum valve face runout . . . . . . . . . . . . . . . . . . . . . 0.038 mm (0.0015 in.) Valve recess (below cylinder head surface): Intake valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.61—1.11 mm 1.63 mm (0.024—0.044 in.) (0.064 in.) Exhaust valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.22—1.72 mm 2.26 mm (0.048—0.068 in.) (0.089 in.) Valve seat width (intake and exhaust) . . . . . .
. . . . . . . . 1.50—2.00 mm (0.059—0.079 in.) (Continued on next page) * C.L.A. (Center Line Average) corresponds to a measure of surface texture. CD,3274,G05,49 -19-04JAN99 05 4