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3.
2
CYLINDER HEAD
19
C.
Inspection
1.
Inspect gasket
surfaces
for
evidence of blow
by or distortion.
If
surfaces
are
warped by more
than 0.05mm l0.002inl
correct
by
lapping
on
a
surface
plate.
(Refer to
Fig. 3. 17)
2.
Remove the
carbon
from the co:nbustion cham-
ber
with
a carbon
scraper, being careful not
to
scratch or damage the
chamber
surface.
Wash
off
the
carbon.
D.
ReassembO
y
l.
Insure that the cylinde
r
head
gasket
,
three
guide pins, and the two
cylinder
stud gaskets
are properly
installed.
(Refer to
Fig. 3. 18)
2.
Assemble the component parts
of the
cylinder
head.
Route the cam chain through the proper
passageway and connect.
!Refer to
Fig. 3. 50)
NOTE:
a. Gently
install the head on
the cylinder
and
properly
flt
the guide pins
into the
head.
b. Be careful not
to
allov
;
the ends of the cam
chain to fall into the case.
3.
Install copper sealing washers
and
cap nuts
on the two right-hand studs, and
install
flat wash-
ers (special item) and hex nuts
on the
other
six
studs,
and torque the units.
NOTE:
a.
The two right-hand stud holes are
oil passage-
ways ; therefore,
if
the copper
washer
is
installed incorrectly,
oil leak will occur.
!The
oil flow
to
the head can
be
checked
by
loosening these cap nuts. l
b. Torquing of
the
head nuts should be performed
starting from the inside and work ing outward
diagonally
as shown in Fig. 3. 19.
Use a
Fig. 3. 17
Measuring
flatness of
gasket
surface
CD
Thickness gauge
@
Square
scale
Fig.
3. 18
Insurance before reassembling the
cylinder
parrs
CD
Cylinder
head gasket
@
12 mm
guide
pins
@
Cy
linder stud gaskets
Fig. 3. 19
Tightening
sequence
CD
Cap nuts
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