Toyota 2VZ-FE, Manual

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(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.
Standard overall length:
Intake 96.1 mm (3.783 in.)
Exhaust 96.2 mm (3.787 in.)
Minimum overall length:
Intake 95.6 mm (3.764 in.)
Exhaust 95.7 mm (3.768 in.)
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.
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.
(c) Check the valve face and seat for the following:
•
If blue appears 360
°
around the face, the valve is
concentric. If not, replace the valve.
•
If blue appears 360
°
around the valve seat, the
guide and face are concentric. If not, resurface the
seat.
•
Check that the seat contact is in the middle of the
valve face with the following width:
1.0–1.4 mm (0.039–0.055 in.)
EM-43
ENGINE MECHANICAL – Cylinder Heads