3) Valve seat
•
Contacting face amount
Measure the contacting face between
intake valve and exhaust valve seat for
valve seat wear, and replace if the mea-
sured value exceeds the specified limit.
Valve contact width
•
Install the valve into the valve seat on the
cylinder head, and check the amount of
depression of the valve from the lower
portion of the cylinder head using a dial
gauge.
Valve Depression
If the amount of depression is beyond
the specified limit, replace the valve seat.
•
For removal of the valve seat, apply arc
welding work to two points of valve seat
insert, and pull out the valve seat insert
with inner extractor.
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