3-36 ENGINE
• After installing the valve guides, re-finish their guiding bores
using the reamer.
• Clean and oil the guides after reaming.
09916-33210: Valve guide reamer
09916-34542: Reamer handle
NOTE:
* Be sure to cool down the cylinder head to ambient air temper-
ature.
* Insert the reamer from the combustion chamber and always
turn the reamer handle clockwise.
VALVE SEAT WIDTH INSPECTION
• Visually check for valve seat width on each valve face.
• If the valve face has worn abnormally, replace the valve.
• Coat the valve seat with Prussian Blue and set the valve in
place. Rotate the valve with light pressure.
• Check that the transferred blue on the valve face is uniform all
around and in center of the valve face.
09916-10911: Valve lapper set
• If the seat width W measured exceeds the standard value or
seat width is not uniform, reface the seat using the seat cutter.
Valve seat width W:
Standard: 0.9 – 1.1 mm (0.035 – 0.043 in)
If the valve seat is out of specification, re-cut the seat.
SAMPLE
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