3-24 ENGINE
• Cool down the new valve guides in a freezer for about one
hour and heat the cylinder head to 100 – 150 °C (212 – 302
°F) with a hot plate.
• Apply engine oil to the valve guide hole.
• Drive the valve guide into the hole using the valve guide
remover.
\ 09916-44310: Valve guide remover (4.95 mm)
NOTE:
Install the valve guide until the contacts with the cylinder head.
• After installing the valve guides, re-finish their guiding bores
using the reamer.
• Clean and engine oil the guides after reaming.
\ 09916-34570: Valve guide reamer (5.0 mm)
09916-34542: Reamer handle
NOTE:
* Be sure to cool down the cylinder head to ambient air tempera-
ture.
* 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 a red lead (Persian Blue) and set the
valve in place. Rotate the valve with light pressure.
• Check that the transferred red lead (blue) on the valve face is
uniform all around and in center of the valve face.
\ 09916-10911: Valve lapper set
Do not use a burner to heat the valve guide hole to
prevent cylinder head distortion.
Failure to oil the valve guide hole before driving the
new guide into place may result in a damaged guide or
head.
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