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THE IGNITION
SYSTEM
B
the t11ginc is now
rotakd
until the notch in the
rear flange of the crankshaft
pulley
is in line with
the small projection on the timing chain case the
piston os e<actly at
T.O.C.
(s<e
Fig. B.3).
(2)
Stt
the
contact breaker points to
·014
to
-()16
in.
('35
to
·40
mm.)
when
in
their
posit
ion of
m~•imum
opening.
(3)
Insert the
d istributor into
its housing. and engage
the
drive
dog lugs
with
the drive
shaft slots (both
of
which are offset)
by slowly
rotating the rotor
arm.
(4)
Sorew
in
the two
bolts securing
the distributor
clamp plate to
the distributor
housing but do
not
tighten them.
Failllfe
to
lea~e
these
bolts
slack
"
'ill
ca-
•isalignmmt
of
the distnl>utor
rtsUiting
in
ucusive
wur
of
tbe
ch-ive
gears.
(S}
Position the
distributor
so
that the vacuum
control
unit
side
of the body is uppermost with the
unit
diaphragm to
the
rear.
{6)
Rotate the distributor
body
anti-clockY.ise
until
the points are
fully
closed.
Then
~lowly
rotate
it
in
a
clockwise
direction until the points
just
commence
to open. Secure
the
d
istributor body
in this position
by tightening
up
the clamp plate
pinch-bolt
and
nut,
give
the engine a few turns
to
allow
alignment of
the gears
to take
place. and
then
fully
tighten the
two clamp plate bolts. Check
that the
rotor
arm is opposite
the
correct segment
for tlte cylinder which is at the top of its compres-
sion
stroke.
IMPORTA~I.
-To
obtain
an aemrate setting
••
dectrkal
method
should
be used
to
cletmnlne the
octul
posltioo
at
'lth.ich
the
poiats
breok,
and the
followin&
method
e1111 be
used:
With the
low-tension
lead cennected
to the
dis-
tributor,
tum
Oft
the
ignition
s..itch
and
cennect a
ll·•olt lamp
in parallel witb
the
centact
bt'eaker
points (i.e. one
lead from
the
distributor
low·
Cension
terminal
and the
other
to
earth)
and
turn the
d~ributor a~
detailed
in
paragraph
6
until the
lamp
lights,
which
indicates
tbat
the
points have
just
opeotil.
(7) After locking the distributor,
re--<:lteelc the
timing.
Section B.8
DISMA1'ITUNG
THE DISTRIBlfTOR
The contact breaker plate
may
be removed
as
an
assembly
to give acoess to the
centrifugal
weights without
completely dismantling
the
d istributor. To do
this
r.move the rotor arm and
withdraw
the slotted nylon
low-ten.,on
terminal
post
from the distributor
body.
Take out
the
two screws
which
secure the pla te
MGA
(fwin Cam)
Issue
3.
27165
UC!"'"'""
CONT.&
e"U"......._-::t
.,..
-"'~
/
(:)..,
f
o\CT
8A(AI\(~
QA.H PL,.Oiol(
Fig.
8.4
CON
tACT
6A(Aoi.(A
t-tlt[A
(APA.CflOR
The components ports of the
DM2.P4
distributor
assembly to the
distributor body, ease
up the
plate, and
unbook the
flexible
actuating link connected
to the
contact
breaker
plate.
The
following procedure is necessary if
the
distributor
is to be completely stripped.
Before dismantling, note
the positions in whieh
the various components
ane fitted
in
o
rder
that they may be replaeed
correctly.
(I) Spring back the clips and remo•·e
the moulded cap.
(2)
Lift
the rotor off
the
top
o
f
the
spindle.
If
it
is a
tight
fit
it
must
be
levered off careflllly witlt
a
screwdriver.
8.5
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