INSPECTION AND SERVICING
NOTE:
If excessive wear, crack, defective
or
other damage
is
found on
any
component, replace,
CYLINDER
HEAD
1.
Remove all carbon from the combustion chamber.
NOTE:
•
Do not use
any
sharp edged tool in order to scrape
ca
rbon
off
th
e cylinder
head
or the head components.
• Be careful
not
to scuff
or
nick the met
al
surfaces when decar·
boning.
2.
Inspect the cylinder head for crack
in
the intake and the
exhaust ports, the combustion chamber and the head sur-
face.
Valve seat
Inspect the valve seats for crack or other damage.
Cylinder
head
di
sto
rtion
Using a straightedge an d the thickness gauge, measure th e
gasket surface of th e cylinder head at a total of six locations as
shown
in
the figure.
i
r'Mtl
09900-20803:
Thickness
gauge
Cy
li
nde
r
he
ad di
stor
tio
n:
Se
rvi
ce
limit
: 0.05
mm
(0.002 in)
lf the meas
ur
ement exceeds the service limit, r
es
urface or
replace
th
e cylinder head.
NOTE:
Th
e
cy
linder he
ad
can be resurfaced, using a surface plate
and
a
#4
00grit
wet sandpaper.
Mov
e
th
e c
yli
nder
head
in a figure eight pattern when sanding.
POWERUNIT
6·11
To Next Page
Loading...
