Toyota 1HD-FT Repair Manual page 62

ENGINE - ENGINE MECHANICAL
EG-49
Overall Length
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/
'-
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(e) Check the valve overall length.
Standard overall length:
Intake
126.85 - 127.45 mm (4.9941 - 5.0177 in.)
Exhaust
126.43 - 127.03 mm (4.9775 - 5.0012 in.)
Minimum overall length:
Intake
126.85 mm (4.9941 in.)
Exhaust
126.43 mm (4.9775 in.)
If the overall length is less than minimum. replace the
valve.
(d) Check the valve stem tip for wear.
If the valve stem
tip
is worn, replace the valve.
7. 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 light coat of prussian blue (or white lead) to
the valve face. lightly press the valve against the
seat. Do not rotate valve.
(e) Check the valve face and seat for the following:
• If blue appears 360
0
around the valve face. the
valve is concentric. If not. replace the valve.
• If blue appears 360
0
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:
Intake
1.4 - 1.8
mm
(0.055 - 0.071
in.)
Exhaust
1.6 - 2.0 mm (0.063 - 0.079 in.)