Honda HS828 Manual page 57

c.
VALVE GUIDE REPLACEMENT
1)
Chill the replacement valve guides in the freezer section of a
refrigerator for about
an
hour
2)
Use a hot plate or oven to heat the cylinder head evenly to
150'C i300'F)
Check the temperature with a temperature indicating stick
(available at welding supply stores) or equivalent.
To avoid burns, use heavy gloves when handling the heated
cylinder head. · - - - - - - - - - - - - ·--·-----
CAUTION:
• Do not use a torch to heat the cylinder head;
warpage of the cylinder head may result.
• Do not get the head hotter than 150°C (300°F);
excessive heat may loosen the valve seats.
3) Remove the heated cylinder head from hot plate and support it
with wooden blocks. Drive the valve guides out of the head
from the combustion chamber side.
TOOL:
VALVE GUIDE DRIVER, 6.6 mm 07942-6570100
CAUTION:
When driving the valve guides out, be careful not to damage
the head.
4) Remove the new valve guides from the refrigerator one at a
time as needed.
5) Install the new valve guides from the valve spring side of the
cylinder head. Drive each valve guide to the specified height
(measured from the top of the valve guide to the cylinder
casting as shown).
6) After installation, inspect the valve guide for damage. Replace
the guide
if
damaged.
IN
3.0
mm
(0.12
in)
EX
3.0 mm (0.12 in)
• VALVE GUIDE REAMING
NOTE~·---------~--------~--~~~------,
~
best results, be sure the cylinder head is at room
~-- t~mper~~--~~-fore ream!::~~-e
gu_•_d_e_s _ _ _ _ _ _ _ _
~
1)
Coat the reamer and valve guide with cutting oil.
2) Rotate the reamer clockwise through the valve gu1de the full
length of the reamer.
3) Continue to rotate the reamer clockwise while removing
it
from
the valve guide.
TOOL:
HS928
VALVE GUIDE REAMER, 6.6 mm
07984-ZE2000D, OR
07984-ZE2000C
HONDA.
HSB2B
Is -;;;OL I
VALVE GUIDE DRIVER,
6.6 mm
07942-6570100 ----.....
Is -;;;OL I
VALVE GUIDE REAMER,
6.6 mm
07984-ZE2000D, OR
07984-ZE2000C