(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.
(c) Check the valve face and seat for the following:
• If blue appears 360 around the face, the valve is
concetric. 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:
1.2 – 1.6 mm (0.047 – 0.063 in.)
8. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45 carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
If not, correct the valve seats as follows:
(1) If the seating is too high on the valve face, use
3a and 45 cutters to correct the seat.
(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.
–ENGINE ENGINE MECHANICAL
EG2–68
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