Toyota 3VZ–FE Troubleshooting Manual page 65

ENGINE TROUBLESHOOTING
11. INSPECT AND GRIND VALVES
(a) Grind the valve enough to remove pins and carbon.
(b) Check that the valve is ground to the correct valve face angle.
Valve face angle:
(c) Check the valve head margin thickness.
Standard margin thickness:
Minimum margin thickness:
If the margin thickness is less than minimum, replace the
valve.
(d) Check the valve overall length.
Standard overall length:
Intake
Exhaust
Minimum overall length:
Intake
Exhaust
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 minimum.
12. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45
carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
(b) Check the valve seating position.
Apply a thin coat of prussian blue (or white lead) to the valve
face. Lightly press the valve against the seat. Do not rotate
the valve.
– ENGINE MECHANICAL
44.5
1.0 mm (0.039 in.)
0.5 mm (0.020 in.)
95.15 mm (3.7461 in.)
94.90 mm (3.7362 in.)
94.6 mm (3.724 in.)
94.4 mm (3.717 in.)
EG–65