EM/Engine Mechanical, page 54

EG–54
ENGINE – ENGINE MECHANICAL

P02190 P02188                                    Z02414

(d)  Using SST and a hammer, tap in a new guide bushing to the
     specified protrusion height.
     SST 09201–10000 (09201–01060), 09608–30022
          (09608–05010)
     Protrusion height:
          Intake
               12.3–12.7 mm (0.484–0.500 in.)
          Exhaust
               11.4–11.8 mm (0.449–0.465 in.)

HINT: Different bushings are used for the intake and exhaust.

Intake                    Exhaust

38.5 mm                  40.5 mm
(1.516 in.)              (1.594 in.)

P04791

Sharp
6 mm
Reamer

P02181 P02071                                    Z02415

(e)  Using a sharp 6 mm reamer, ream the guide bushing to obtain
     the standard specified clearance (See step 6) between the
     guide bushing and valve stem.

EM0254 EM0180                                    Z00054

7.   INSPECT AND GRIND VALVES
(a)  Grind the valve enough to remove pits and carbon.
(b)  Check that the valve is ground to the correct valve face angle.
     Valve face angle:
          44.5°

44.5°

(c)  Check the valve head margin thickness.
     Standard margin thickness:
          0.8–1.2 mm (0.031–0.047 in.)
     Minimum margin thickness:
          0.5 mm (0.020 in.)
     If the margin thickness is less than minimum, replace the
     valve.

Margin Thickness

EM0181