Table of Contents
Advertisement
HONDA
EP5000-EPS500S
•
VALVE GUIDE REAMING
• For best
results,
be sure the cylinder head is at room
temperature before reaming valve
guides.
n
Coat the reamer and valve guide with cutting
oil.
2)
Rotate the reamer clockwise through the valve guide the
full length of the
reamer.
3)
Continue to rotate the reamer clockwise while
removing
it
from the valve guide.
4)
Thoroughly
clean the cylinder head to remove any
cut-
ting
residue.
5)
Check the valve guide
bore;
it should be
straight,
round
and centered
in the valve guide.
Insert the valve and
check
operation.
If the valve does not operate
smoothly,
the guide
may have been bent during
installation.
Replace the valve guide if it is bent or
damaged.
6)
Check the Valve Guide-to-Stem Clearance (P.
10-4).
d.
VALVE
SEAT
RECONDITIONING
1)
Thoroughly
clean the combustion
chamber
and valve
seats to remove carbon
deposits.
Apply a light coat of Prussian Blue or erasable felt-tipped
marker ink to the valve
face.
2)
Insert the valve, and snap it closed against its seat several
times.
Be sure the valve does not rotate on the
seat.
The
transferred marking compound will show any area of the
seat that is not
concentric.
•
Follow the instructions
of the valve seat cutter manu-
facturer.
3)
Using a
45°
cutter,
remove enough material to produce a
smooth and concentric seat.
Turn the cutter
clockwise,
never counterclockwise.
Continue to turn the cutter as you lift it from the valve
seat.
4)
Use the
30°
-
32°
and
60°
cutters to narrow and adjust
the valve seat so
that
it contacts the middle of the valve
face.
The
30°
-
32°
cutter removes material from the top
edge (contact too
high).
The
60°
cutter
removes
material
from the bottom edge (contact too
low).
Be sure that the
width of the finished valve
seat
is within
specification.
[S.;:ZOL)
VALVE GUIDE
REAMER
07984 - ZE20000
@
~
o
@
~
X
CONTACT TOO
HIGH
CONTACT TOO LOW
10-5
Advertisement
Table of Contents
