Inspect And Clean Valve Seats - Toyota Celica 2000 Repair Manual

ENGINE MECHANICAL
(c)
If the margin thickness is less than minimum, replace the valve.
EM0131
(d)
Over a l l Lengt h
If the overall length is less than minimum, replace the valve.
{e)
If the valve stem tip is worn, replace the valve.
1 1 .
(a)
(b)
Resur f a ce
A01Dl3
If the valve seat 45$ residuary width less than minimum. replace
the cylinder head.
(c)
(d)
CYUNDER HEAD
Check the valve head margin thickness.
Standard margin thickness: 1.0 mm {0.039 in.)
Minimum margin thickness: 0.7 mm (0 . 028 in.)
Check the valve overall length.
Standard overall length:
1ZZ-FE
Intake 88.65 mm (3.4902 in.)
Exhaust 88.69 mm (3.4917 in.)
2ZZ-GE
Intake 111.3 mm (4.382 1n.)
Exhaust 111.7 mm (4.398 in.)
Minimum overall length:
1ZZ-FE
Intake 88.35 mm (3.4783 in.)
Exhaust 88.39 mm (3.4799 in.)
2ZZ-GE
Intake 110.9 mm {4.366 in.)
Exhaust 111.3 mm (4.382 in.)
Check the surface of the valve stem tip for wear.

INSPECT AND CLEAN VALVE SEATS

•
Using a carbide cutter, resurface the valve seats.
45
Remove only enough metal to clean the seats.
After resurfacing the valve seat
ary width of the valve seat
Minimum residuary length:
Intake 3.3 mm (0.130 in.)
Exhaust 3.2 mm (0.126 in.)
Check the valve seating position.
Apply a light coat of prussian blue (or white lead) to the
valve face. Lightly press the valve against the seat. Do not
rotate valve.
Check the valve face and seat for the following:
If blue appears 360° around the face, the va!ve is
concentric. If not. replace the valve.
EM-51
·, measure the residu­
45
45 �.