CYLINDER
HEADIV
ALVES
Ream the
new
valve
guide
after installation.
Use
CUtting
011
on
Insert the reamer
from
the
combustion
chamber
the reamerdunng side
of
the
head and always rotate
the
reamer clock-
"I!!""""-!~!"'''''!~
/hls
opera/J()(I
wise. r
TOOL:
Valve guide reamer, 5.0
mm
07984-
MA
60001 or
01984·MA60000
(U.S.A.
only)
Clean the
cylinder
head
thoroughly
to
remove
any
metal particles.
Refaee the valva seat (page 7.
12
).
VALVE SEAT INSPECTION/REFACING
Clean
the
intake and
exhaust
valves
thoroughly
to
~""!
I
.!:':~ND-
I
-A1!!NG
i'6
~~
~
....
...
remove carbon deposits.
~
The
valves
cannof
be
ground
If
8
valve
face
is
burned
or
Apply
a
light
coal
ing
of
Prussian Blue to the valve
seat.
lap
the valves and seats using a rubber hose
or
other
hand-lapping
1001.
Remove and inspect the valves.
Inspect
the
width
of
ea
ch valve seat.
badlywom
01
rf
If
STANDARD: 1.0 _ 1.3
mm
(0.
04
- 0.05 in)
COOfacrs
rM
sear
SERVICE LIMIT: 2.0
mm
(0.08 in)
uneven/),. replace
rhe
valve.
If the seat is
100
wide,
100
narrow
or
has
low
spots,
the seat
must
be ground.
VALVE SEAT REFACING
t
t
//
\
./
1.
0-1.3
mm
(0.04 - 0.05 in)
• Follow the refacing manufacturer's operating
,------------------,
instructions
.
•
Be
careful
nOI
to
grind
the
seat
mo
re than neces·
say.
7-12
g \
45
0
6
L
'
~2
0
6 \
60
0
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