Valve Guide Replacement - Honda Transalp XL700V Manual

VALVE GUIDE REPLACEMENT

Refinish the valve seats whenever the valve guides
are replaced to prevent uneven seating.
Chill new valve guides in a freezer section of refrig-
erator for about an hour.
Heat the cylinder head to 130 – 140°C (275 – 290°F)
Using a torch to
with a hot plate or oven. Do not heat the cylinder
heat the cylinder
head beyond 150°C (300°F). Use temperature indica-
head may cause
tor sticks, available from welding supply stores, to
warping.
be sure the cylinder head is heated to the proper
temperature.
To avoid burns, wear insulated gloves when han-
dling the heated cylinder head.
Support the cylinder head and drive out the old
Be careful not to
guides from the combustion chamber side of the
damage the
head.
cylinder head.
TOOL:
Valve guide driver, 5.5 mm
Adjust the valve guide driver to the valve guide
height.
TOOL:
Valve guide driver
VALVE GUIDE PROJECTION ABOVE CYLINDER
HEAD:
IN: 12.5 – 12.7 mm (0.49 – 0.50 in)
EX: 16.7 – 16.9 mm (0.66 – 0.67 in)
Drive new guides in from the camshaft side of the
cylinder head to the valve guide height while the
cylinder head is still heated.
Let the cylinder head cool to room temperature,
then ream the new valve guides.
TOOL:
Valve guide reamer, 5.510 mm
• Take care not to tilt or lean the reamer in the
guide while reaming. Otherwise, the valves
maybe installed slanted, causing oil leakage
from the stem seal and improper valve seat con-
tact. This may prevent valve seat refacing.
• Insert the reamer from the combustion chamber
side of the head and always rotate the reamer
clockwise.
Clean the cylinder head thoroughly to remove any
metal particles after reaming.
Reface the valve seat (page 8-21).
07742-0010100
07743-0020000
PROJECTION
VALVE GUIDE REAMER
07984-2000001
CYLINDER HEAD/VALVES
VALVE GUIDE DRIVER
VALVE GUIDE DRIVER
8-19