Chapter IV Disassembly & Repair
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make it contact with the central part of the conical surface
of valve.
Grind the top edge of valve seat with a 32° grinder (the
contact is too high).
Grind the top edge of valve seat with a 45° grinder (the
contact is too low).
Ensure that the contact width of completed valve is withing
the specified range.
e) Grind slightly with a 45° grinder to remove all burrs
on the edge of valve seat.
f) Check the width of valve seat after re-repairing the valve
seat. Coat colorant on the conical surface of valve, insert
the valve and press it for several times, and ensure that it does
not rotate it on the valve seat. Where the conical surface of
valve is coated the colorant uniformly as shown as figure, it
indicates the valve contacts with the conical surface of
valve seat well.
g) Coat abradant on the conical surface of valve seat
and abrade the valve seat by rotating valve abrasive
tool.
h) Check the valve clearance after assembly.
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