Inspect And Clean Valve Seats - Toyota 22R-E Service Manual

EG1–26
ENGINE – ENGINE MECHANICAL
(e) Check the valve overall length.
Standard overall length:
Intake 113.5 mm (4.468 in.)
Exhaust 112.4 mm (4.425 in.)
Minimum overall length:
Intake 113.0 mm (4.449 in.)
Exhaust 111.9 mm (4.406 in.)
If the valve overall length is less than minimum, re–
place the valve.

12. INSPECT AND CLEAN VALVE SEATS

(a) Using a 45S carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
(b) Check the valve seating position.
Apply a light coat of prussian blue (or white lead) to
the valve face. Install the valve. 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 360S around the face, the valve is
concentric. If not, replace the valve.
If blue appears 360S around the valve seat, the
guide and seat are concentric. If not, resurface
the seat.
Check that the seat contact is on the middle of
the valve face with the following width:
1.2 – 1.6 mm (0.047 – 0.063 in.)
If not, correct the valve seat as follows:
If seating is too high on the valve face, use 30S
and 45S cutters to correct the seat.