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ID
19
OPERATION
No.
ID
112-O
: Adjust&
valve rocker clearances
0~.
ID
112-O
55
1
2
3
PARTICULAR
POINTS
Valve clearance = 0.008"
(0.20
mm>
for the inlet valves and 0.010"
(0.25 mm) for the exhaust valves.
Adjust the valves of one cylinder with the piston at T.D.C., end of compression, the valve of the corresponding
cylinder is then at the point of balance.
(1st cylinder, the valves of the 4th cylinder being at the point of balance, 3rd cylinder, the valves of the 2nd cylinder being at the point of
balance, 4th cylinder, the valves of the 1st cylinder being at the point of balance, 2nd cylinder, the valves of the 3rd cylinder being at
the point of balance.)
ADJUSTING.
Remove
the
air
filter
and
pipe
assembly
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..*.*.......*.......................
12-17
mm
box
spanners
To
remove
the
cylinder
head
cover
(see
Pl.
1)
:
a)
Disconnect
the
leads
from
the
sparking
plugs.
Remove
the
rubber
(41)
and
bakelite
(42)
caps
from
the
sparking
plug
tubes.
b)
Remove
the
sparking
plugs
(spanner
1603-T,
see
Pl.
16,
fig.
4)
so as
to
avoid
breaking
the
electrodes
when
moving
the
cylinder
head
cover
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..~.....................
c)
Rkmove
the
cylinder
head
cover;
do
not
mislay
the
sealing
joints
(2)
for
the
sparking
plug
tubes
. . .'. . . . . . . . .
Adjust
the
clearance
of the
valve
rockers
to
:
0.008"
(0.
20 mm)
for
the
inlet
valves;
0. 010"
(0.
25 mm)
for
the
exhaust
valves.
Adjust
the
valves
of
one
cylinder
with
the
piston
at
T.D.
C.
(end
of compression
stroke).
The
valve
of
the
corresponding
cylinder
is
then
at
point
of balance,
that
is,
the
inlet
valve
is
at
start
of
admission
and
the
exhaust
valve
at the
end
of
exhaust
(turn
the
engine
over
by
means
of the
starting
handle).
Adjust
the
valves
of
:
1st
cylinder,
the
valves
of the
4th
cylinder
being
at point
of
balance.
3rd
cylinder,
the
valves
of the
2ndcylinder
being
at point
of
balance.
4th
cylinder,
the
valves
of
the
1st
cylinder
being
at point
of balance.
2nd
cylinder,
the
valves
of the
3rd
cylinder
being
at point
of balance.
Fit
the
cylinder
head
cover
(see
Pl.
1) using
"Hermetic"
compound
to
stick
the
gasket
on
the
cover
only,
Make
sure
that
the
sealing
joints
(2)
are
properly
located
in
the
sparking
plug
tube
cups
(1).
Tighten
the
cylinder
head
fixing
nuts
(leather
and
plain
washers)
I-.-
..-......................................
Fit
the
air
filter
and
pipe
assembly.
Tighten
the
fixing
nuts
(spring
washers).
Tighten
the
hose
clip
on
the
pipe
to
the
carburettor
. . . . . . . . . . .._.......................................................................
-
TOOLS
Spanner
1603-T
12 mm
box
spanner
'
12 mm
box
spanner
12-17
mm
box
spanners
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