Datsun 1000 Workshop Manual page 168

7
Check the ignition timing
with
a
timing light
and
check and
adjust
the dwell
angle
if necessary
8 Instal
the
vacuum
advance line
TO TIME ENGINE AND
SET
IGNITION
TIMING
Static
method
1 Ensure
that the
contact
breaker points
are
clean
and
adjusted to the specified clearance
2 Rotate the crank
haft until No
1
piston
is at
tdc
at
the end of the
compression
stroke
3
Align
the
pointer
on
the
timing
cover
with the
extreme
left hand mark
on
the
crankshaft pulley
when
viewing
the
pulley
from the
front of the
car
4
The
position
of the
rotor
should be in
alignment
with No I
high
tension
lead terminal
of
the
cap and the
contact breaker
points
should be
just starting to
open
5 To
adjust
loosen the
anchor plate
to
mounting
bracket
screw
and
move
the
distributor body
in the
direction
required
then
retighten
the
screw
6 Road test the
vehiCle and
make
final adjustments
to
obtain best
performance
and
smoothest
operation
TO ADJUST
IGNITION
TIMING
AND
DWELL
ANGLE
Using instruments
1
Connect
a
tachometer dwell meter
and
timing
light
to
the
engine
according to
the manufacturer
s
instructions
2 Start the engine and
bring to
normal
operating
temperature
3
Adjust
the
engine
igle
speed to specifications
Electrical
System
22
4 Disconnect the
vacuum
line
from
the
vacuum
advance unit and check the
advance
position
with the
timing light
each division
on
the
crankshaft pulley equals
5
degrees
refer
specifications
for the correct
setting
5
Adjust
the
timing position
by loosening
the
mounting plate retaining
bolt and
rotate
the
distributor
body
in the
slot if the
adjustment is not possible
at this
point
it will be necessary
to
loosen the
screw
holding the
mounting plate to
the
distributor
body
both
these
screw
holes
are
elongated
for this
adjustment
6 After
the
COffect
timing position
has been
determi ed
make
sure
the
mounting plate to engine
retaining
bolt and the
mounting plate to
distributor
body
screws are
firmly
tightened
7 Check the
contact
dwell refer Specifications
for
the correct setting adjust by opening
or
closirig
the contact
breaker
pain t
gap
the engine
will have to
be stopped
and
the distributor cap
and
rotor button
removed to
carry out
this
operation
8 After
setting
the
contact
dwell
at
idle speed
increase
the
engine speed
t0
approximately
2500 rpm
checking
the
dwell
angle
as
the
rpm
s
increase
Any
variation
greater
than
specifications
indicate
orn
parts
within
the distributor in which
case
the
distributor
will
have to
be
removed for uverhaul
9
After
checking
and adjusting the dwell angle
recheck the
ignition timing
and
adjust
if necessary
10 Reconnect the
va uum
advance line and
adjust
the engine
idle
to speCifications
11 Remove the
test
instruments and reconnect
any
disconn ctcd wiring etc
POINTER
IGNITION
TIMING
MARKS
Showing
Ignition
Timing
Marks and Distributor Advance and Retard Scale
169