Inspect And Grind Valves; Inspect And Clean Valve Seats - Toyota 3F-E Repair Manual Supplement

ENGINE MECHANICAL — Cylinder Head
Length
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11. INSPECT AND GRIND VALVES

(a)
Grind the valve only 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:
Intake
Exhaust 1.7 — 2.3 mm (0.067 — 0.091 in.)
Minimum margin thickness:
Intake
Exhaust 1.2 mm (0.047 in.)
If the valve head margin thickness is less than minimum,
replace the valve.
(d)
Check the valve overall length.
Standard overall length:
Intake
Exhaust 128.0 mm (5.039 in.)
Minimum overall length:
Intake
Exhaust 127.5 mm (5.020 in.)
If the valve overall length is less than minimum, replace
the valve.
EM2534
(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.
CAUTION: Do not grind off more than the minimum
overall length.

12. INSPECT AND CLEAN VALVE SEATS

(a) Using a 45° carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
I
C^
EM1 379
1.5 — 2.1 mm (0.059 — 0.083 in.)
1.0 mm (0.039 in.)
124.8 mm (4.913 in.)
124.3 mm (4.894 in.)
EM-23