Toyota T100 1996 Service Manual page 870

EM−42
Sharp 6 mm Reamer
Margin Thickness
1996 TOYOTA T100 (RM449U)
ENGINE MECHANICAL (5VZ−FE)
P20985
44.5°
Z00054
EM0181
Overall Length
EM2534
EM0255
− CYLINDER HEAD
(h) Using a sharp 6 mm reamer, ream the guide bushing to
obtain the standard specified clearance (See step 9) be-
tween the guide bushing and valve stem.
11. 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°
(c) Check the valve head margin thickness.
Standard margin thickness:
1.0 mm (0.039 in.)
Minimum margin thickness:
0.5 mm (0.020 in.)
If the margin thickness is less than minimum, replace the valve.
(d) Check the valve overall length.
Overall length:
Standard
Minimum
If the overall length is less than minimum, replace the valve.
(e) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, resurface the tip with a grinder or
replace the valve.
NOTICE:
Do not grind off more than the minimum.
Intake 95.15 mm (3.7461 in.)
Exhaust 94.90 mm (3.7362 in.)
Intake 94.60 mm (3.7244 in.)
Exhaust 94.40 mm (3.7165 in.)