Toyota 3S-GE Repair Manual page 108

EG-94
ENGINE — ENGINE MECHANICAL
fig?'
,' Q 'i' \ C /g
C"
P16713 P16681
l
y 1
(
C
Sharp/)
6 mm
Reamer
/,\
Z1 'I974
lr—
Margin Thickness
EM0181
i
(g) Using a sharp 6 mm reamer, ream the guide bushing
to obtain the standard specified clearance (See step5
above) between the guide bushing and valve stem.
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°
\Q'"'" 44.5"
Y
EM0254 EM01B0 100954
(0) 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.
Q (d) Check the valve overall length.
Standard overall length:
lntake
99.80 — 100.20 mm (3.9291 — 3.9449 in.)
Overall Length Exhaust
98.85 - 99.25 mm (3.8917 — 3.9075 in.)
Minimum overall length:
Intake
gggg M534 99.30 mm (3.9094 in.)
Exhaust
98.35 mm (3.8720 in.)
If the overall length is less than minimum, replace the
valve.