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3. 2
CYLINDER
HEAD
31
4.
Tighten
the
torsi on bar holde
r
Use
the
torque wrench
to torq
ue the
torsion
bar in
the direct ion
marked
by
the
arrow
and
after insuring
that
it
has
been torqued
to
the
proper
value,
insert a
dowel p;n
and
then
tig hten
the
bolt, torque
to
512
to
640 kg-mm
(3.7-
4.63
ft.
lb.).
(Fig. 3. 49)
N.
Cam Chain Guid
e Roller Construction
There
ore
seven
cam
chai
n
guide
roller
s used
in this engine
to minimize
cam chain noise.
To
provide
greater durability to the
ca
m chain,
all
the
rol
lers ore mounted
on rubber.
Especially, on
those
rollers
whi
ch
supports heavy
loads, reve rse
T
type
rubber bushing are
press
fitted
.
Needle bearings
are
used
at
the tension area and also
at
the
C
area
s.
The
respective
guide ro
llers
are lubricat ed
by the
oi
l
spray
and mist.
(Fig. 3. 50)
0.
Cam Chain
Guide
Roller Disassembly
T
guide
roller
1 .
Remove either
the
inlet
or the
exhaust
cam-
shaft in
acc ordance
with
Section
3.2G.
2
.
Extrac
t the guide
rolle
r
pin.
Guide rollers A and R
Remove
the bracket bolts and
remove
the
rollers
.
B guide
roller
1.
Remove
the
cyli
nder
in
accordance
with
Section 3.
2 R.
2.
Rem
ove
the guide
ro
ller
pin.
P.
Cam
Chain
Guide- Roller Reassem
bly
NOTE
:
a.
When
assembling the parts
into
the
cylinder
head,
the movable parts must be oiled
before
assembly.
This
is necessary
because
it
will
required
some
time ofte
r
the
engine is in
operation
before
the
pressure
builds
up suffi-
cientl
y
to
lubrica
te
the
moving
ports.
b. Assemble
guide
rollers A,
C
and R in that
order.
After
complet
ing
the
guide
rollers
in-
stallation,
check to
the make
sure
that
they
all
operate
free
ly
.
Fig.
3.
49
Insure
that it
hos
been
ti ghtened
w.ith the
cor-
rect
torque
CD
Torsion bar
valve
spring
@
Torq
ue wre nch
(
R
)
Fig. 3. 50
Com
chai
n
guide roller
®
Attachment
(T)
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