ECU DATSUN B110 1973 Service Workshop Manual

GENERAL
INFORMATION

spring
etc

support
the
rear
cruss
member
with

stands
In

other
cases

support
both
ends

of
the
rear

axle

housing

with
stands

Fig
CI
9
Rear

jacking
point

Fig
C
J
0
Rear

supportable
point

TOWING

Manual

transmission
model

When
the

car
is
towed

forward
connect

the

rope

securely
to
the
notched

portion
of
the
tension

rod

bracket
In

no
event
should
a

rope
be

applied
to
the

transverse
link

To

two
another
car

connect
a

rope
to
the
rear

shackle
of
rear

spring

Note
Avoid

applying
load

suddenly
to
a

rope
as
it

may

cause
damage
Fig
GI
l1
Front

towing
point

Fig
GI
12
Rear

towing
point

Automatic
transmission
model

The
car

may
be
towed

safely
on
its
rear
wheels
on
the

ground
with
the

select
lever

in
N
Neutral

position
of

at

speeds
of
less
than
30
km
h

18
7
MPH
However
the

propeller
shaft
must
be

disconnected

or
the
car
must
be

towed

on
its
front

wheels
on
the

ground
under
the

following
conditions

Tow

speed
of
more
than
30
kro
h
18
7
MPH

2

Car
must
be
towed
for
a

long
distance

over
10
km
or

6
miles

3
Transmission
is
not

operating
properly

If
car
is
towed
on
its

front
wheels
on
the

ground
the

GI
4

GENERAL
INFORMATION

steering
wheel

should
be
secured
to
maintain
a

straight

ahead

position

TIE
DOWN

The

front
tie
down
hook
is

used
the

both
front
end
of
tension
rod
Do
not

apply
the
hook
at
the
center
of

tension
rod
or

suspension
member

The
rear
tie
down
hook
is
used
the

both
front
shackle

of

rear

spring

APPROXIMATE
REFILL
CAPACITY

Liter
U
S
A

measure

I
Imp
measure

Sedan

Fuel
tank

Coupe

with
heater

Cooling
system

without
heater
40
L

38

L

4
9

L

4
2
L

2
7
L

0
54

L

1
2
L

5
5
L

0
75
L

0
24

L
Oil

pan

Oilf1lter

Transmission

case
Manual

Automatic

Differential

case

Steering
gear
box

RECOMMENDED

GASOLINE
FUEL

Use
a
no
lead

or
low
lead

gasoline
with
a
minimum

octane

rating
of
87
the

average
of
the
Research
and
1O

gal
8Y

gal

10

gal
8

gal

5

v

qt
4

M
qt

4
Y
6

qt
3

Y

qt

2Ji

qt
2

qt

1

pt
I

pt

2

pt
2

pt

5Ji

qt
4

qt

1

pt
1

pt

pt
pi

Motor
Octane
Numbers
in
the
U
S

When
the

figure
is

based
on
the
Research

Octane
Number
use
a

gasoline

with

a
minimum
octane

rating
of

91
RON
in

Canada

RECOMMENDED
LUBRICANTS

GI
5
r

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

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

ENGINE

J

I
r
I

I
J

fj

7
L

j
8

if

d1
I

ilfi
3

c

7

I
t

j

v

1

Ji

Fig
EM
27

Valve
mo
1

2
Be
careful
not
to
lose
valve

spring
seat
oil
seal
valve
collet
and
valve
rocker

spring

O

tj
AAAftIl

C

e
WWII

o

glAWle

Fig
EM
28

Valve

components

INSPECTION
AND
REPAIR

CONTENTS

PREPARATION
FOR
INSPECTION
EM
8

How
to
measure
cylinder
bore

EM
16

CYLlNOER
HEAD
AND

80ring
cylinder
EM
16

VALVES

EM
9

PISTON
PISTON
PIN
AND

Checking
cylinder
head

mating
face
EM
9

PISTON
RING

EM
18

Valve

assembly
EM
9

CONNECTING
ROD

EM
19

Valve

spring
EM
10
CRANKSHAFT
EM

20

Valve
rocker
shaft
and
rockei
arms

EM
lO
BUSHINGS
AND
BEARINGS

EM

21

Valve
lifter

and

push
rud

EM
11

Measuring
main

bearing
clearance

EM
21

Valve

guide
EM
11

Measuring
connecting
rod

bearing
clearance

EM
22

Valve
seat
inserts

EM
12

Fitting
crankshaft
bearings
EM
22

CAMSHAFT
AND

CAMSHAFT
BEARINGS
EM
14

Fitting
camshaft

bushings
EM
23

Measuring
camshaft

bearing
clearance

EM
14

MISCELLANEOUS
COMPONENTS
EM

24

Valve

timing
EM
14
Crankshaft

sprocket
and
camshaft

Checking
camshaft
for

bending
EM
14

sprocket
EM

24

CYLlNOER
BLOCK
EM
15

Flywheel
EM

25

PREPARATION
FOR
INSPECTION

L

Check
the

cylinder
head
and

cylinder
block
for

traces

of
water
leaks
before

cleaning

2

Clean
all

parts
to
remove
oil
stains
carbon

deposits
fur
and
other

foreign
matters

completely

3
Make

sure
that
all
oil
holes
are
clear
Blow
air
into

them
if

required

4

Secure

proper
assembly
carefully

EM
8

ENGINE
MECHANICAL

3

Apply
engine
oil

to
the
main

bearing
surfaces
on

both
sides
of
the

cylinder
block
and

cap

Install
the
crankshaft

4
Install
the
main

bearing
cap
and

tighten
the

bolts

with

specified
torque

Tightening

torque

5
0

to
6

0

kg
m
36

to
43

ft
lb

Notes
a

Arrange
the

parts
so
that
the
arrow

mark
on

the

bearing
cap
is
faced
toward
the
front
of
the

engine

b
Prior
to

tightening
the

bearing
cap
bolts

place

the

bearing
cap
at
a

proper
position
by

shifting

the
crankshaft
in
the

axial
direction

c

Tighten
the

bearing
cap
bolts

gradually
in

separating
two
to

three

stages
and

outwardly
from

the
center
beari

ng

d
After

securing
the

bearing
cap
bolts
ascertain

that
the
crankshaft

can
be

easily
rotated

5
Make
sure

that
the
crankshaft
end

play
is

correct

Crankshaft
end

play

0
05

to
0
15

rom
0
0020
to

0
0059

in

Fig
EM
73

Crankshaft
end

play
check

EM
27
Fig
EM
73
t

Applying
adhesive

6
Install
the
rear
oil
seal

7
Install
the

flywheel
securely

using
the

lock
washers

and

tighten
the
bolts
with

specified

torque

Tightening
torque

6
5
to
7
5

kg
m
47

to
54

ft
lb

Iii

Fig
EM
74

Flywheel
installation

8
Rotate
the

engine
a

quarter
turn
and
install
the

piston
rod

assembly

LUBRICATION
CIRCUIT

Oil
drawn

from
the
oil

pan
through
the
inlet

screen
and

tube

to
the
inlet
side
of
the
oil

pump
is
delivered

by
th

oil

pump
through
the
outlet

portion
of
the
oil

pump
and

the
oil

gallery
to
the
inlet

side
of
the
full
flow
oil

filter

and
to
the

main
oil

gallery

The
main
oil

gallery

supplies
oil
to
the

crankshaft
main

bearings
and

drilled

passages
in
the
crankshaft
and

thus

oil
is

fed

directly
from
the

main

bearings
to
the

connecting
rod

bearings

Oil

injected
from

jet
holes

on

connecting
rods

lubri

cates
the

cylinder
walls
and

pistion
pins

The
oil

distributed
from
the
main

gallery
enters
the

chain

teosioner
and
the

pad
is
held

against
the

chain

by

oil

pressure
and

spring
The
oil

also
lubricates
the

timing

chain

through
the

jet
hole

located

near
the
chain

Furthermore

lubricant
is

supplied
to
each
camshaft

bearing
through
each
crankshaft
main

bearing
and

finally

to
the
011

gallery
in
the
rocker

shaft

through
the
center

camshaft

bearing

The
rocker

arm
and
valve

are
lubricated

by
the
oil

through
the
oil

gallery
in
the

rockershaft

To
this

oil

gallery
lubricant

is

supplied
through
the

center

camshaft

bearing
as
shown

in

Figure
EL
I

OIL
PUMP

Description

The
oil

pump
assembly
is
installed
on
the
bottom
of

the

cylinder
block
and
driven

by
the
distributor

drive

shaft

assembly
The
oil

pump
is
of

a
rotor

type
The
oil

pressure
is

regulated
by
the

regulator
valve
camshaft

Removal

Engine
in
vehicle

Drain

engine
oil

2
Remove
the
frunt

stabilizer

3
Remove
the

splash
shield

board

4
Detach
the
oil

pump
body
together
with
drive

gear

spindle
ENGINE

Fig
EL
2
Removal

of
oil

pump

Disassembly

Prior
to

disassembling
check
to

determine
that
the

pump
is

defective

Take

out
a
total
of
2
bolts

securing
the

pump
cover

to
the

pump
body
The

outer
and
inner

rotors
and
drive

shaft
can

then
be

disassembled

2

Applying
a
suitable
wrench
or

spanner
loosen
off
the

regulator
valve

Note
a
When

placing
the
valve
in
a
vise
use
extreme

care
not
to
distort
the

pump
body
and
cover
in
the

jaws

b
Do

not

pull
out
the
drive
shaft

pin

securing
the

driven
shaft
and
inner
rotor
The
shaft
is

press

fitted
to
the
rotor
with
the

pin
calked

n

Trochoid

Fig
EL
Oil

pump

EL
2

FUEl

SYSTEM

MA
JOR
SERVICE
OPERATIONS

A

completely
adjusted
and
serviced
carburetor
will

provide
the

engine
with

proper
mixture

at
all

speeds

Periodical

overhauling
which
cleans

all

components
and

passages
will

recover
the

originally
designed
performance

producing
the

engine
with

proper
gasoline
and
air
ratio
at

all

speeds
Passages
and
holes
of
the
carburetor
must
be

cleaned

carefully
Use

only
carburetor
solvent
and
com

pressed
air

to
clean
aU

passages
and

discharge
holes
Never

use
wire
or
other

pointed
tool
otherwise

accurately

calibrated
carburetor

will
be

affected

Removal

Remove
the

air
cleaner

2

Disconnect
the
fuel
line
vacuum
line
automatic

choke
harness
and
anti
dieseling
solenoid
harness
from

carburetor

3

Remove
the
throttle
lever

4
Remove
four

nuts
and

washers

retaining
the

carbuTe

tor
to
the

manifold
if

necessary

5
Lift
the
carburetor
and
remove
from
the

manifold

6
Remove
and
discard
the

gasket
used

between
the

carburetor
and
manifold

Disassembly

The
main

jets
and
needle
valves
on
both

primary
and

secondary
sides
are

accessible
from
outside
of
the

carbure

tor
for

disassembly

2
Remove

throttle
return

spring

3
Remove

pump
lever
shaft
take

out

pump
lever

and

pump

connecting
rod

4
Remove

rubber

pipe
from
choke

piston

5

Loosen
off
bolts

securing
servo

diaphragm
in

posi

tion
take
out

diaphragm

6

Back
off
total
of
five
bolts
which
hold
choke
in

position
and
remove
rods
of
starter

system
take
out

choke
chamber

In

removing
chamber
exercise
care
to
avoid

damaging

float

EF
19
ilia

Fig
EF
32

Removing
choke
dwmherand

seroo

diaphragm

7
The

primary
and

secondary
emulsion

tubes
can

be

disassembled

by
removing
the

main
air
bleeds
on
the

individual
sides

In

removing
injector
weight
piston
return

spring
and

ball
care
should
be
excercised
to

prevent
them
from

being

scattered
and
lost

OQ

fI

Fig
EF
33

Removing
emulsion
tubes

8
To

check
the

accelerator

pump
the

pump
cover
is

removed
Be
careful
not

to
lose
the

return

spring
and
inlet

valve
ball

provided
at
the
lower

part
of
the

piston

during

disassemb

ly

Removal
of

bi
metal
cover
is
a

simple
matter
of

removing
three
set
screws

When
it

becomes

necessary
to
take

out
float

pull
shaft

from
float

Note
Under
no

circumstances
should
bi
metal
be
moved

with
excessive
force
since
this

may
cause
a

perma

nent
set
in
bi
metal

making
starting
difficult

When

the
contacts

stationary
and

movable
are
dused

the
motor

operates
to
crank
the

engine
and
the
series

coil
of
the
solenoid
is
cut
out
The

magnetic
force
of
the

shunt
coil
is

sufficient
to
hold
the

pinion
in
mesh
after

shifting
the

system

When
the

engine
is

operated
and
the

ignition
switch
is

set
to
ON
the
series
coil

demagnetizes
the
shunt

coil
and
the
return

spring
actuates
the

plunger
to
return

to
the

original
position
Consequently
the

motor

stops

More

positive
meshing
and
demeshing
of
the

pinion
and

the

ring
gear
teeth

are
secured

by
means
of
the
over

running
clutch
The

over

running
clutch
employs
a
shift

lever
to

slide
the

pinion
along
the

armature
shaft
so
as
to

engage
or

disengage
with
the

ring
gear
teeth
The

over

running
clutch
is

designed
to
transmit

driving
torque

from
the

motor
armature
to
the

ring
gear
and

to

permit

the

pinion
over

running
the

armature
when
the

engine
is

started
ENGINE

ijJ

1

t

2

3

4

5

6

7
Stationary
contact

Serie
coil

Ignition
switch

Solenoid

Shunt
coil

Plunger

Return

spring
8

Shift
lever

9
Drive

pinion

10

Ring
gear

11
Pinion
sleeve

spring

12

Armature

13
Movable

contactor

14

Battery

Fig
EE
5

Starting
motor
circuit

CONSTRUCTION

1

2

3

4

5

6

7

8

9

10

11

12

13
j
@

Gear
case

Du
t
cover

Shift
lever

Dust
cover

Shift
lever

pin

Magnetic
switch

Center
bracket

Armature

Thrust
washer

Metal

Stopper
washer

Stopper
l

lip

Pinion

stopper
@

@

o

@
i
1I
@
@
@

14

15

t6

17
Pinion

Over

running
clutch

Field
coil

Yoke
18
B
rush
cover

19

Brush

20
Rear
cover

21

Through
bolt

Fig
EE
6

Exploded
view

of
staTting
motoT
SI14
B7M

Disconnect
the

black
and

yellow
wire
from
the

magnetic
switch

terminal
and

black

battery
cable
from

the

battery
terminal
REMOVAL

I
Disconnect
the

ballery
ground
cable

EE
4

ENGINE
ELECTRICAL

SYSTEM

2

Remove
two
bolts
llsed
to

secure
the

starting
motor

on
the

clutch

housing
Pull
the

starter

assembly
forward

and

remove
the

starting
motor

DISASSEMBLY

Remove
the
brush

cover
and
take
out
the

brush

6

Fig
EE
7

Removing
the

brush
cover

2
Loosen
the

nut
used

to
secure

the

connecting
plate

to
the

magnetic
switch
M

terminal
Remove

two
screws

used

to
secure
the

magnetic
switch

Remove
the

cotter

pin
and
withdraw

the
shift

lever

pin
Now

remove
the

magnetic
switch

Fig
EE
8

Removing
the

magnetic
switch

assembly

3
Remove

two

through
bolts

and

rear
cover
assembly

Remove
the

yoke
assembly
by

lightly
tapping
with
a

wooden
mallet
Fig
EE
9

Removing
the
brush
cover
and

yoke

assembly

4

Withdraw
the

armature

assembly
and

shift
lever

Fig
EE
l0

Removing
the
armature

assemlby
and

shift
lever

5

Remove
the

pinion
stopper
from
the
armature
shaft

end
To

remove
the

stopper
first

remove
the

stopper

washer
and

push
the

stopper
to
the

over

running
clutch

side
and
after

removing
the

stopper
clip
remove
the

stopper
together
with
the

over

running
clutch
Withdraw

the
over

running
clutch

assembly
from
the

armature
shaft

Fig
EE
11

Removing
the
over

running
clutch

assembly

EE
5