Valve Guide Projection In; Valve Guide Replacement - Honda C8R600F4 Service Manual

CYLINDER HEAD/VALVE
Check the cam chain tensioner and guide for exces-
sive wear or damage and replace them if necessary.
Install the cam chain tensioner and guide in the
reverse order of removal.
Apply locking TORQUE: Tensioner:
10 N·m (1.0 kgf·m, 7 lbf·ft)
agent to the ten-
Guide: 12 N·m (1.2 kgf.m, 9 lbf·ft)
sioner (socket)
bolt threads.
Install the right crankcase cover (page 9-14).
VALVE GUIDE REPLACEMENT
8-12
Chill new valve guides in the freezer section of a
refrigerator for about an hour.
Heat the cylinder head to 130-140 °C (275-290 °F)
with a hot plate or oven.
Wear heavy gloves to avoid burns when handling
the heated cylinder head.
CAUTION:
Using a torch to heat the cylinder head may cause
warpage.
Support the cylinder head and drive the valve
guides out of the cylinder head from the combus-
tion chamber side.
TOOL:
Valve guide driver
07JMD-KY20100
While the cylinder head is still heated, drive new
valve guides in the cylinder head from the
camshaft side until the exposed height is following
dimensions.
TOOL:
Valve guide driver
07JMD-KY20100
VAL VE GUIDE PROJECTION:
IN: 16.1 16.4 mm (0.63-0.65 in)
EX: 14.3-14.6 mm (0.56-0.57 in)
Let the cylinder head cool to room temperature.
CAM CHAIN TENSIONER
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CAM CHAIN GUIDE
VALVE GUIDE
DRIVER