Valve Guide Replacement - Honda Fourtrax Rancher AT 2004 Service Manual

CYLINDER HEADIV ALVEI CAMSHAFT
VALVE GUIDE REPLACEMENT
Be sure to wear
heavy gloves to
avoid burns when
handlmg the heattW
cyimder head.
Using a torch to
heal the cylinder
head may cause
w,l(page.
Take care nor to tilt
or lean the ref/mer
In
the gUide while
reaming.
Use Cuffing 011 on
the reamer durmg
this operation.
8-12
Mark new valve guides at the specified height indi-
cated below, using a marker. Chill the new valve
guides in a freezer for about an hou r.
Heat the cylinder head to 130°C_140°C (275°F-
290°F) with
a
hot plate or oven. Do not heat the cyl-
inder head beyond 150°C (300
e
n.
Use temperature
indicator sticks, available from welding supply
stores, t o be sure the cylinder head is heated to the
proper temperature.
Support the cylinder head and drive the valve
guides out of the cylinder head from the combus-
tion chamber side using the special tool.
TOOL:
Valve guide remover, 5.5 mm 07742·0010100
While the cylinder head is still heated, remove the
new valve guides f rom the freezer and drive them
into the cylinder head from the rocker arm side until
the exposed height is at the specified val ue (at the
mark).
TOOL:
Valve guide driver, 5.5 mm 07742·0010100
VALVE GUIDE PROJECTION:
IN: 15.8 - 16.0 mm (0.62 - 0.63
in )
EX : 15.8 - 16.0 mm (0.62 - 0.63 in)
l et the cylinder head cool to room temperature.
Ream the new valve guides.
Insert the reamer from t he combustion chamber
side of the head and always rotate the reamer clock-
wise.
TOOL:
Valve guide reamer, 5.5 mm 07984-2000001 or
07984-2000000
(U.S.A. only)
Clean the cylinder head thoroughly to remove any
metal particles aher reaming and reface the valve
seat (page 8-14).