Honda WT30XK4, Manual

Page: 92 / 124

CYLINDER HEAD/VALVES
12-9
Drive the valve guides (1) out of the cylinder head from
the combustion chamber side.
When driving the valve guides out, be careful not to
damage the cylinder head.
Remove the new valve guides from the refrigerator one
at a time as needed.
Install the new valve guides from the valve spring side
of the cylinder head.
Exhaust valve guide (2):
Drive the exhaust valve guide until the valve guide clip
(3) is fully seated as shown.
Intake valve guide (4):
Drive the intake valve guide to the specified height
(measured from the end of the valve guide to the
cylinder head as shown).
After installing the valve guide, check the guide for
damage.
Replace the valve guide if damaged.
Let the cylinder head cool to room temperature.
Ream the valve guide.
VALVE GUIDE REAMING
For best results, be sure the cylinder head is at room
temperature before reaming valve guides.
Coat the reamer and valve guide with cutting oil.
Rotate the reamer clockwise through the valve guide
the full length of the reamer.
Turn the special tool (valve guide reamer) clockwise,
never counterclockwise.
Continue to rotate the special tool while removing it
from the valve guide.
Thoroughly clean the cylinder head to remove any
cutting residue.
TOOL:
Valve guide driver, 6.0 × 11.5 mm (2) 07942-6570100
COMBUSTION
CHAMBER SIDE
(1)
(2)
TOOL:
Valve guide driver, 6.0 × 11.5 mm (1) 07942-6570100
IN VALVE GUIDE INSTALLATION HEIGHT:
WT30XK4:
6 mm (0.24 in)
WT40XK3: 5 mm (0.20 in)
VALVE SPRING SIDE
WT30XK4: 6 mm (0.24 in)
WT40XK3: 5 mm (0.20 in)
(1)
(3)
(2)
(4)
TOOL:
Valve guide reamer, 6.612 mm (1)
07984-ZE2000D
(1)
COMBUSTION
CHAMBER SIDE
VALVE SPRING
SIDE
T-HANDLE
NWYT505
(Commercially available)
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