(1) VALVE GUIDE REAMER
Valve Seat Inspection/Refacing
This machine's intake and exhaust valves are titani-
um.
If the brown coating of the valve is removed, or the
metal surface is appeared, replace the valve with a
new one.
Clean the intake and exhaust valves thoroughly to
remove carbon deposits.
Ream the valve guide to remove any carbon build-
up.
(1) VALVE LAPPING TOOL
Apply a light coating of Prussian Blue to the valve
seat.
Tap the valves and seats using a rubber hose or
other hand lapping tool.
Remove the valve and inspect the valve seat face.
If a valve face is burned or badly worn or if it con-
tacts the seat unevenly, replace the valve.
The valve seat contact should be within the speci-
fied width and even all around the circumference.
4-34
Engine Servicing
Valve spring
Check the valve springs for fatigue or damage.
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