Page 305 of 513
SERV
I
CE
0
M
ANUttlJ
j
f
l
DATSUN
1200
MODEL
B
110
SERIES
rNlSSAN
I
NISSAN
MOTOR
CO
LTD
TOKYO
JAPAN
J
f
p
l
SECTION
ET
GII
EMISSION
CONTROL
AND
TUNE
UP
EMISSION
CONTROL
SYSTEM
AND
ENGINE
TUNE
UP
SERVICE
DATA
AND
SPECIFICATIONS
TROUBLE
DIAGNOSES
AND
CORRECTIONS
Ell
El
25
El
26
Page 306 of 513

EMISSION
CONTROL
AND
TUNE
UP
EMISSION
CONTROL
SYSTEM
AN
D
ENGINE
TUNE
UP
CONTENTS
BASIC
MECHANICAL
SYSTEM
ET
Checking
and
adjusting
dash
pot
Adjusting
intake
and
exhaust
valve
automatic
transmission
model
only
ET
9
clearances
ET
1
Checking
carburetor
return
spring
ET
9
Checking
and
adjustin9
drive
belt
ET
2
Checking
choke
mechanism
choke
valve
Retightening
cylinder
head
bolts
manifold
and
linkagel
ET
9
nuts
and
carburetor
securing
nuts
ET
2
Checking
anti
dieseling
solenoid
ET
9
Checking
engine
oil
ET
2
Replacing
fuel
filter
ET
10
Replacing
oil
filter
ET
3
Checking
fuel
lines
hoses
pipings
Changing
engine
coolant
L
L
C
ET
3
connections
etc
ET10
Checking
cooling
system
hoses
and
THROTTLE
OPENER
CONTROL
SYSTEM
ET
10
connections
ET
4
Checking
and
adjusting
throttle
opener
ET
13
Checking
vacuum
fittings
hoses
and
TRANSMISSION
CONTROLLED
VACUUM
connections
ET
4
ADVANCE
SYSTEM
ET
17
Checking
engine
compression
ET
4
Checking
electrical
advance
control
system
ET
19
Checking
exhaust
manifold
heat
control
AUTOMATIC
TEMPERATURE
CONTROL
AIR
valve
ET
5
CLEANER
A
T
C
AIR
CLEANER
ET
20
IGNITION
AND
FUEL
SYSTEM
ET
5
Replacing
carburetor
air
cleaner
filter
ET
20
Checking
battery
ET
5
Checking
hot
air
control
valve
ET
20
Checking
and
adjusting
ignition
timing
ET
5
CRANKCASE
EMISSION
CONTROL
Checking
or
replacing
distributor
breaker
SYSTEM
ET
22
point
condenser
and
spark
plugs
ET
6
Checking
or
replacing
PCV
valve
ET
23
Checking
distributor
ignition
wiring
and
Checking
ventilation
hoses
ET
23
ignition
coil
ET
7
EVAPORATIVE
EMISSION
CONTROL
Checking
distributor
cap
and
rotor
ET
7
SYSTEM
ET
23
Adjusting
carburetor
id
Ie
rpm
and
Checking
engine
compartment
hose
mixture
ratio
ET
8
connections
and
fuel
vapor
control
valves
ET
23
Checking
fuel
tank
vacuum
relief
valve
operation
ET
24
BASIC
MECHANICAL
SYSTEM
1
Start
engine
and
run
it
until
it
is
heated
to
operating
temperature
or
at
least
more
than
800C
I760F
of
engine
oil
temperature
then
stop
engine
Adjusting
intake
and
exhaust
valve
clearances
Valve
clearance
adjustment
should
be
made
while
engine
is
stationary
To
adjust
proceed
as
follows
2
Rotate
crankshaft
to
bring
No
1
cylinder
in
top
dead
center
on
its
compression
stroke
3
Remove
valve
rocker
cover
to
gain
access
to
valve
ET
1
Page 307 of 513

ENGINE
operating
mechanism
Adjust
valve
clearance
at
following
four
points
while
engine
is
still
hot
G
Exhaust
valve
of
No
1
cylinder
CV
Intake
valve
of
No
1
cylinder
CID
Intake
valve
of
No
2
cylinder
CID
Exhaust
valve
of
No
3
cylinder
Note
Numbers
in
parenthesis
agree
with
those
in
ac
companying
sketch
I
Fig
BY
1
Adjusting
valve
clearance
4
Again
rotate
crankshaft
one
turn
so
that
No
4
piston
is
in
top
dead
ce
lter
on
its
compression
stroke
Adjust
follnwing
valves
@
Exhaust
valve
of
No
2
cylinder
@
Intake
valve
of
No
3
cylinder
f
Intake
valve
of
No
4
cylinder
@
Exhaust
valve
of
No
4
cylinder
Adjustment
should
be
made
while
engine
is
hot
After
all
valves
have
been
adjusted
correctly
tighten
lock
nut
firmly
to
secure
the
adjustment
Vah
e
clearance
Hot
Intake
0
35
mm
0
014
in
Exhaust
Checking
and
adjusting
drive
belt
II
I
Fig
ET
2
Adjusting
drive
belt
tension
I
Check
for
a
cracked
or
damaged
V
belt
Replace
if
defective
2
Adjust
the
belt
tension
if
necessary
Belt
deflection
when
thumb
pressure
of
10
kg
22
0
lb
is
applied
midway
between
pulleys
10
to
15
mm
0
394
to
0
590
in
Retightening
cylinder
head
bolts
manifold
nuts
and
carburetor
securing
nuts
Cylinder
head
bolts
When
the
engine
is
in
cold
tightening
should
be
made
in
several
steps
and
in
sequence
shown
in
Figure
EM
82
page
EM
31
starting
with
the
center
toward
the
ends
Tightening
torque
1st
turn
2nd
turn
4
0
to
4
5
kg
m
29
to
33
ft
lb
5
5
to
6
0
kg
m
40
to
43
ft
lb
Then
warm
up
the
engine
and
retighten
the
bolts
to
the
specification
of
hot
condition
Tightening
torque
hot
6
0
to
6
5
kg
m
43
to
47
ft
lb
Other
tightening
torque
Manifold
nuts
0
9
to
14
kg
m
6
5
to
10
ft
lb
Carburetor
nuts
0
5
to
LO
kg
m
3
6
to
7
2
ft
lb
Checking
engine
oil
Oil
capacity
of
engine
including
oil
filter
ET
2
Page 308 of 513

EMISSION
CONTROL
AND
TUNE
UP
Capacity
Maximum
3
3
L
X
US
gal
y
Imp
gal
2
3
L
US
gal
f
Imp
gal
Minimum
Make
sure
that
engine
oil
is
not
deteriorated
with
cooling
water
or
gasoline
Drain
and
refill
the
oil
if
necessary
Notes
a
A
milky
oil
indicates
the
presence
of
cooling
water
Find
the
cause
for
necessary
corrective
action
b
Oil
with
extremely
low
viscosity
indicates
dilution
with
gasoline
2
Check
oil
level
If
found
below
L
mark
refill
to
H
mark
on
gauge
Fig
ET
3
Checking
engine
oil
level
Replacing
oil
filter
The
oil
ftIter
is
of
a
cartridge
type
The
oil
filter
can
be
removed
using
oil
ftIter
wrench
STl9320000
Check
for
oil
leaks
through
gasketed
flange
If
any
leakage
is
found
retighten
slightly
If
necessary
replace
filter
as
an
assembly
2
When
installing
an
oil
filter
tighten
by
hand
Note
Do
not
overtighten
oil
filter
or
oil
leakage
way
result
Changing
engine
coolant
L
L
C
Nissan
long
life
coolant
LLC
is
an
ethylene
glycol
base
product
containing
chemical
inhibitors
to
protect
the
cooling
system
from
rusting
and
corrosion
The
L
L
C
does
not
contain
any
glycerine
ethyl
or
methyl
alcohol
It
will
not
evaporate
or
boil
away
and
can
be
used
with
either
high
or
low
temperature
thermostat
It
flows
freely
transfers
heat
efficiently
and
will
not
clog
the
passages
in
the
cooling
system
The
LL
C
must
not
be
mixed
with
other
products
This
coolant
can
be
used
throughout
tlie
seasons
of
the
year
Whenever
any
coolant
is
changed
the
cooling
system
should
be
flushed
and
refilled
with
a
new
coolant
Check
the
level
J
Percent
Boiling
point
0
9
kgfcm2
Freeze
concen
tration
Sea
level
cooling
sys
protection
tern
pressure
30
1060
C
I
240C
15OC
221OF
255OF
5OF
50
IUY
C
1270C
35
C
2280
F
2610F
3IOF
DC
OF
0
321
10
14
20141
50
58
I
I
I
I
1
I
I
1
30
1
22
40
401
40
10
30
50
20
EGOOl
Fig
ET
4
Protection
concentration
ET
3
Page 309 of 513

ENGINE
Checking
cooling
system
hoses
and
connections
Check
cooling
system
hoses
and
fiHings
for
loose
connections
and
deterioration
Retighten
or
replace
as
necessary
Inspection
of
radiator
cap
Apply
reference
pressure
0
9
kg
cm1
13
psi
to
radiator
cap
by
means
of
a
cap
tester
to
see
if
it
is
in
good
condition
Replace
cap
assembly
if
necessary
ET012
Fig
ET
5
Testing
radiator
cap
Cooling
system
pressure
test
With
radiator
cap
removed
apply
reference
pressure
1
6
kg
cm1
23
psi
to
the
cooling
system
bv
means
of
a
tester
to
check
for
leaks
at
the
system
compo
nents
Water
capacity
with
heater
4
9
l
I
Y
US
gal
l
i
Imp
gal
without
heater
4
2
l
I
i
US
gal
i
Imp
gal
Fig
ET
6
Testing
cooling
system
pressure
Checking
vaccum
fittings
hoses
and
connections
Check
vacuum
system
fittings
and
hoses
for
loose
connections
and
deterioration
Retighten
if
necessary
replace
any
deteriorated
parts
Checking
engine
compression
Compression
pressure
test
Note
To
test
cylinder
compression
remove
all
spark
plugs
and
hold
tester
fitting
tightly
in
spark
plug
hole
of
cylinder
The
tester
is
used
to
determine
whether
cylinder
can
hold
compression
or
whether
there
is
excessive
leakage
past
rings
etc
I
Td10
l
y
Fig
ET
7
Testing
compression
pressure
Test
compression
with
engine
warm
all
spark
plugs
removed
and
throttle
and
choke
valve
opened
No
cylinder
compression
should
be
less
than
80
of
highest
cylinder
s
Excessive
variation
between
cyl
inders
accompanied
by
low
speed
missing
of
the
cylinder
usually
indicates
a
valve
not
properly
seating
or
a
broken
piston
ring
Low
pressures
even
though
uniform
may
indicate
worn
rings
This
may
be
accompanied
by
excessive
oil
consumption
Test
conclusion
If
one
or
more
cylinders
read
low
inject
about
one
tablespoon
of
enigne
oil
on
top
of
the
pistons
in
low
ET
4
Page 310 of 513

EMISSION
CONTROL
AND
TUNE
UP
reading
cylinders
through
spark
plug
hole
Repeat
compression
check
on
these
cylinders
1
If
compression
improves
considerably
piston
rings
are
defective
2
If
compression
does
not
improve
valves
are
sticking
or
seating
improperly
3
If
two
adjacent
cylinders
indicate
low
compression
and
injecting
oil
on
pistons
does
not
increase
compres
sion
the
cause
may
be
a
cylinder
head
gasket
leak
between
the
cylinders
Engine
oil
and
coolant
in
cylinder
could
result
from
this
problem
Compression
pressure
12
S
to
14
S
kg
cm2
178
to
206
psi
at
3S0
rpm
Checking
exhaust
manifold
heat
control
valve
Check
heat
control
valve
for
proper
operation
If
it
does
not
operate
properly
trouble
is
due
to
excess
carbon
on
shaft
or
damaged
shaft
Clean
if
necessary
The
bimetal
should
be
also
checked
for
proper
function
IGNITION
AND
FUEL
SYSTEM
Checking
battery
Check
electrolyte
level
in
each
battery
celL
L
Unscrew
each
filler
cap
and
inspect
fluid
leveL
If
fluid
level
is
low
add
distilled
water
to
bring
level
up
to
app
roximately
10
to
20
mm
0
3937
to
0
7874
in
above
plates
Do
not
overfilL
2
Measure
specific
gravity
of
battery
electrolyte
ET002
Fig
ET
B
Checking
the
specific
gravity
of
battery
electrolyte
Permissible
Full
charge
value
value
at
200C
68OF
Frigid
climates
Over
1
22
1
28
Tropical
climates
Over
1
18
1
23
Other
climates
Over
L
20
1
26
Clean
the
top
of
battery
and
terminals
with
a
solu
lion
of
baking
soda
and
water
Rinse
off
and
dry
with
compressed
air
The
top
of
battery
must
be
clean
to
prevent
current
leakage
between
terminals
and
from
positive
terminal
to
hold
down
clamp
In
addition
to
current
leakage
prolonged
accumulation
of
acid
and
dirt
on
the
top
of
battery
may
cause
blistering
of
the
material
covering
connector
straps
and
corrosion
of
straps
After
tightening
terminals
coat
them
with
petro
laturn
vaseline
to
protect
them
from
corrosion
Checking
and
adjusting
ignition
timing
I
Check
spark
plugs
and
distributor
breaker
points
for
condition
2
Thoroughly
wipe
off
dirt
and
dust
from
timing
marks
on
crank
pulley
and
front
cover
3
Warm
up
engine
sufficiently
ET
5
Page 311 of 513

ENGINE
4
Install
a
timing
light
on
No
cylinder
spark
plug
wire
and
install
a
tachometer
5
Set
idling
speed
to
approximately
800
rpm
6
Check
ignition
timing
if
it
is
50BTDC
Before
Top
of
Dead
Center
by
the
use
of
timing
light
If
necessary
adjust
it
as
follows
Loosen
set
screw
to
such
an
extent
that
distributor
can
be
moved
by
hand
2
Adjust
ignition
timing
to
50BTDC
3
Lock
distributor
set
screw
and
make
sure
that
timing
is
correct
Fig
ET
9
Checking
ignition
timing
Ignition
timing
degree
50
B
T
D
C
Checking
or
replacing
distributor
breaker
point
condenser
and
spark
plugs
Distributor
breaker
point
Check
distributot
breaker
points
for
abnormal
pitting
and
wear
Replace
if
necessary
Make
sure
they
are
in
correct
alignment
for
full
contact
and
that
point
dwell
and
gap
are
correct
Clean
and
apply
distributor
grease
to
earn
and
wick
Note
Do
not
apply
grease
excessively
Distributor
Point
gap
0
45
to
0
55
mm
0
018
to
0
Q22
in
49
to
55
degrees
Dwell
angle
ET004
Fig
ET
10
Checking
distributor
point
gap
Condenser
I
Clean
outlet
of
condenser
lead
wire
and
check
for
loose
set
screw
Retighten
if
necessary
2
Check
condenser
capacity
with
a
capacity
meter
Condenser
insulation
resistance
may
be
also
checked
using
a
tester
by
adjusting
its
range
to
measure
large
resistance
value
When
condenser
is
normal
the
tester
pointer
swings
largely
and
rapidly
and
moves
gradually
back
to
the
infmite
side
When
the
pointet
does
not
stay
still
or
it
points
zero
in
resistance
replacement
is
necessary
Condenser
capacity
0
221LF
Micro
Farad
Condenser
insulation
resistance
5
Mn
Mega
ohms
Spark
plugs
Remove
and
clean
plugs
in
a
sand
blast
cleaner
Inspect
each
spark
plug
Make
sure
that
they
are
of
the
specified
heat
tange
Inspect
insulator
for
cracks
and
chips
Check
both
center
and
ground
electrodes
If
they
are
excessi
ely
worn
replace
with
new
spark
plugs
File
center
electrode
flat
Set
the
gap
to
0
8
to
0
9
rom
0
031
to
0
035
in
using
the
proper
adjusting
tool
Tighten
plugs
to
1
5
to
2
0
kg
m
11
0
to
15
0
ft
lb
torque
ET
6
Page 312 of 513

EMISSION
CONTROL
AND
TUNE
UP
Fig
ET
11
Checking
spark
plug
gap
Checking
distributor
ignition
wiring
and
ignition
coil
Distributor
Check
centrifugal
advance
unit
for
loose
connection
or
improper
operation
If
it
is
not
operating
properly
the
trouble
may
be
due
to
a
sticky
spring
or
excessively
worn
parts
This
operation
needs
a
distributor
tester
As
to
inspection
procedure
and
reference
data
refer
to
relative
topic
under
Distributor
in
Section
EE
Page
EE
32
If
vacuum
advance
mechanism
fails
to
operate
proJr
erly
check
for
the
following
items
and
correct
the
trouble
as
required
1
Check
vacuum
inlet
for
signs
of
leakage
at
its
connection
If
necessary
retighten
or
replace
with
a
new
one
2
Check
vacuum
diaphragm
for
air
leak
If
leak
is
found
replace
diaphragm
with
a
new
one
3
Inspect
breaker
plate
for
smooth
moving
If
plate
does
not
move
smoothly
this
condition
could
be
due
to
sticky
steel
balls
or
pivot
Apply
grease
to
steel
balls
or
if
necessary
replace
breaker
plate
as
an
assembly
For
vacuum
advance
characteristics
refer
to
Distribu
tor
in
Section
EE
Page
EE
32
Ignition
wiring
Use
an
ohmmeter
to
check
resistance
of
secondary
cables
Disconnect
cables
from
spark
plugs
and
install
the
proper
adapter
between
cable
and
spark
plug
Remove
distributor
cap
from
the
distributor
with
secondary
cables
attached
Do
not
remove
the
cables
from
the
cap
Check
the
resistance
of
one
cable
at
a
time
Connect
the
ohmmeter
between
the
spark
plug
adapter
and
the
corresponding
electrode
inside
the
cap
If
resistance
is
more
than
30
000
ohms
remove
the
cable
from
the
cap
and
check
cable
resistance
only
If
the
resistance
is
still
more
than
30
000
ohms
replace
cable
assembly
T
I
II
Fig
ET
12
Checking
high
tension
cables
Ignition
coil
Check
ignition
coil
for
appearance
oil
leakage
or
performance
For
details
refer
to
Section
EE
Page
EE36
Checking
distributor
cap
and
rotor
Note
This
operation
is
to
be
performed
while
chekcing
distribuotr
points
Inspect
distributor
cap
for
cracks
and
flash
over
External
surfaces
of
all
parts
of
secondary
system
must
be
cleaned
to
reduce
possibility
of
voltage
loss
All
wires
should
be
removed
from
distributor
cap
and
coil
so
that
terminals
can
be
inspected
and
cleaned
Burned
or
corroded
terminals
indicate
that
wires
were
not
fully
seated
which
causes
arcing
between
end
of
wire
and
terminal
When
replacing
wires
in
terminal
be
sure
they
are
fully
seated
before
pushing
rubber
nipple
down
over
tower
Check
distributor
rotor
for
damage
and
distributor
cap
for
cracks
ET
7