DATSUN B110 1973 Service Repair Manual

ENGINE
ElECTRICAL
SYSTEM

CHECKING
AND

ADJUSTMENT

Cap
and
rotor
head

Cap
and

rotor
head

must

always
be

kept
clean
to

maintain

good
insulation

durability
since

high
tension

voltage
from

ignition
coil
is

imposed
on
them

Sometimes

inside
of

the

cap
and

rotor
head
is
covered
with
fine

carbon

particles
and
dust
Whenever
crack
or

trace
of

leakage
is

found

on
the

cap
replace
with
a

new
one

Recommend
the
rotor
head

also
be

replaced
with
a

new

one
if

excessively
damaged

Point

When

point
surface
is

roughened
due
to

burning
polish

with
a
fine

emery
paper
No

500
or
600

or
oil
stone

When

the

point
is

worn

excessively
replace
When
the

point
is

replaced
with
a
new
one

apply
grease
to
the
arm

pivot
receiver
and

earn
surface
For
causes
of

damaged

burnt

point
improper
point
contact
insufficient

point

gap
and
defective
condenser
are

considered

The
standard

point
gap
is
0
45
to
0
55

mm
0

0177
to

0
0217
in
When

gap
is
deviated
from
the

standard

gap

adjust
Turn
the
shaft
to
a

position
where
the
breaker
arm

heel
rides
the
com

lug
a

position
where

point
gap
is

maximum
loosen
the

gap
adjusting
screw

apply
a

thickness

gauge
between

contacts
and

adjust
to
the

standard

point
gap

Fig
EE
60

Adjusting
point
gap
When

measuring
breaker

point
spring
tension

apply

spring
tension

gauge
to
the
breaker

point
and

position
the

spring
tension

gauge
in

right
angle
against
the
breaker
arm

The
standard

breaker

point
spring
tension
is
0
5

to
0
65

kg
1
1
to
I
4Ib

Replace
if
deviated

Fig
EE
61

Measuring
breaker

point
spring
tension

Condenser

Performance

of
condenser
is

affected

by

improper

setting
contamination
and

reduction
of
insulation

re

sistance
Thus

periodical
checking
is

required
to
maintain

the
outlet
of
lead
wire
clean
and

to

prevent
set
screw
from

loosening
Checking
the

condenser

capacity
is

checked

using
a

capacity
meter
It

may
be

also
checked
condenser

isolate
resistance

using
a
tester

by

adjusting
its

range
to

measure

large
resistance

value

When

the
condenser
is
normal
the

tester

pointer

swings
largely
and

rapidly
and
moves

gradually
back
to

the
infinite

side
When
the

pointer
does

not

stay
still
or
it

points
Zero
in
resistance

replacement
is

necessary

Centrifugal
advance
mechanical

part

When
cause
of

engine
trouble
is

traced
to

centrifugal

advance
mechanical

part
use

distributor
tester
to

check

its
characteristics

EE
31

ENGINE

When

nothing
is

wrong
with
its

characteristics
con

ceivable

causes
are
defectiveness
or
abnormal

wearing
of

driving

part
or
others
Do

not
disassemble
it

When
characteristics
are

improper
check
earn
as

sembly
governor
weight
shaft
and

governor
spring
and

other
relative

parts
carefully

When

reassembling
the

centrifugal
advance
mechanical

part
be

sure
to
check

advance
characteristics

by
the
use

of
a
distributor
tester

Centrifugal
advance
characteristics

1

c

1

Ei
12

L

o

V

o

u

c

o

o

t

D

c

s

151

14

e

101

0

81
V

0

u

c

51
0

41
t

0

Q
2

01

0
I

I
I
1

rj

11

50

I

J
2
100

50
oQ
5

00

400

800
1
200

1
600
2

00

Distributor
RPM

Fig
EE
62
D412

80formanual
transmission

I
I
I

2
350
13
50

1

1

1
300

1

1

550
00

h
6
0
0

I

400

800
1

200
1
600
2

000

Distributor
RPM

Fig
EE

63
D412
B9

faT
automata

transmission
2
400

I

11
50

2
400

EE

32
Vacuum
advance
mechanical

part

Vacuum
ad
ance
characteristic

12

I

I

I

I
I

II1
5515
5Q

i

01
40

00

i1j
50
00

1

I

o
50
100
150
200
250
300
350
400
450

500
550

21
41
6
8

101
C121
141
161
181

201
22

V2Icuum

mmHg
inHg
I
I
I

I

7

50
1
1Q

Ii

V
I

o
0

u

i
e
6

tI
2

o

i5

0
235

Fig
EE
64
D412
80

for
manual
transmission

c

1

0

I
o

9i
8

o

u

0

i

61
0

0

0
4

o

Q

2

I
I
I

450
x
70

L
H

1
500

501

287
00

l
320
oJ

I

I

200250300350400450500550

IS
101
1121
t4

16
16
1201
22

Vacuum

mmHg

OnHg
o

50
100
150

2
141
161

Fig
EE
65
0412
89

for
automatic
transmission

The

following
causes
are
considered
for

impropeI

opera
tion

I

Leakage
of
air
due
to

incomplete
fastening
of

vacuum
inlet

ENGINE
ElECTRICAL
SYSTEM

2

Leakage
due
to
defective

diaphragm

3

Stationary
side

and

moving
side
of
the

breaker

plate

are

sticked

Solution
for
1
is

to
make

complete
fastening
and
2
is

to

replace
it

with
a
new
one
Solution
for
3
is
as
follows

I
The

moving
side
of
the
breaker

plate
is

supported

by
three
steel
balls

at

upper
and
lower

sides

Make

sure
that

these
balls
work

smoothly

2

The

moving
side
of
the
breaker

plate
is

rotated
with

the

stationary
side

pivot
receiver

Make

sure
that
this

pivot
receiver

operates
correctly

When

assembling
be

sure
to

apply
three

steel
balls
to
the

upper
and
lower
sides
and
to

grease
them

DISASSEMBLY
AND

REASSEMBLY

Disassembly

When

the
distributor
is
disconnected
from

engine

position
of
distributor

and
rotor
head
for

housing
must
be

weB
remembered
or

marked

If

distributor
is
installed
incorrectly
it
does
not

operate
correctly
Disassembly
is

to
be
carried
out
in
the

following
sequence

I
Remove

cap
and
disconnect
rotor
head

2
When

removing
the
contact
set

first
unscrew
two
set

screws
one

to
one
and
a
half
of
full
turn

Remove
the

primary
lead

terminals
and
remove

the

contact
set
from
the

distributor

Fig
EE
66
Removal

of
contact
set

EE
33
3
Remove

the
vacuum
controller

Fig
EE
67

Disassembly
of
vacuum

controller

4
Loosen

two
screws
used
to
secure
the

breaker

plate

on
the

housing
and
remove
the

breaker

plate
The

clamp

terminal
and

lead
wire
can
also
be

removed

r

Fig
EE
6B

Removal

ofbTeaker
plate

5
To
remove
the
earn

remove
the

set
screw
first

since

the
shaft
head
is
fastened

by
the

screw
to
hold
the

cam

down

Fig
EE
69
Removal

of
cam

ENGINE

6
Drive

out
the
knock

pin
and
disconnect
the

pinion
to

remove
the

whole

rotary
unit

Fig
EE

70
Removal

of
knock

pin

7

Remove
the
whole

rotary
unit

When

disconnecting
the

governor
spring
from
the

governor
weight
be
careful
not
to
stretch
or

deform
the

governor
spring
tJ

0

Fig
EE
71
Removal

of
Totation

pari

Reassembly

Reassemble
the

distributor
in
reverse

sequence
of

disassembly
When

assembling
be
sure
to
coat

grease
to

portion
as
shown
in

Figure
EE
58

For
the

governor
spring
and
earn

installing

positions

refer
to

Figure
EE
72

1

I
Rotor

positioning
tip

2

Governor

spring
A

13
I
Weight
pin

4

Governor

weight

15

I
earn

Fig
EE
72

Installation

of
governor

spring
and
cam

Set
the

governor

spring
A

to
the

rotor
head

po

sitioning
tip
side
In
this

case
the

weight
pin
for
the

governor

spring
A
is

applied
into

the

long
groove
and
a

clearance
is

remained
at

beginning
and

ending
of

advancing
On

the
other
hand
the

weight

pin
in

the

opposite
side

enters
the
short

groove
and
no
clearance
is

remained

at
both

beginning
and

ending
of

advancing
Upon
completion
of
the

assembly
measure

advancing

characteristics

to
ensure
the

performance
before

installing

the
distributor

on
the

engine

EE

34

ENGINE
ElECTRICAL
SYSTEM

SPECIFICATIONS
AND

SERVICE
DATA

Specifications

Make
and

type
0412
80
0412

89

for
Manual
for
Automatic

Transmission
Transmission

Firing
order
1
3
4
2
I
3
4
2

Rotating
direction
Counterclockwise

Counterclockwise

Dwell

angle
49
550
49
550

Condenser

capacity
J
lF
0
20
to

0
24
0

20
to
0
24

Service
data

Point

gap
mm
in
0
45
to
0
55

0
0177
to
0

0217

0

50
to
0
65
1
1
to
1
4
Point

pressure
kg
lb

Condenser

capacity
p
F

Micro
Farad
0

20
to
0
24

Condenser
isolate
resistance

M
1

Mega
Ohms
5

Cap
carbon

point
mm
in

rom
in

Housing
inner

diameter
mm
in
12
0
472

0
010

D
0004

12
45

0
020
0
4902

D
0008

12
45
018

0
4902
0007
Shaft
diameter

lower

part

Clearance
between
shaft
and

housing
mm
in

Amendment
limit
of
clearance
mm
in
0
010
to

0
Q38
0

0004
to
0

0015

0
08
0
0031

8
0
005

0
3150
0
0002

D

O
14

D
0006

8
O
15

0
3150
0006

0
005
to
0
029

0
0002
to
0
00
II
Shaft
diameter

upper
part
mm
in

earn
inner

diameter
rom
in

Clearance
between
shaft
and
cam

mm
in

EE
35

ENGINE

Weight

pivot
diameter

mm
in

Weight
hole
diameter

mm
in

Clearance
between

pivot
and
hole

mmOn
5
0

028

0
9
9
1

0011

1
005
1

6

1
0002

5
1
018

0

1969
0

0007

o
0

0
005
to

0
046
0
0002

to
0

0018

IGNITION
COIL

CONTENTS

DESCRIPTION
EE
36

DESCRIPTION

The

Ignition
coil
is

of
an
oil

filled

type
The

ignition

coil
case
is
mted

with
oil
which
has

good
insulating
and

heat

radiating
characteristics

The

ignition
coil
has
a

greater
ratio
between
the

primary
and

secondary
windings
to

step
up
the

battery

voltage
to
the

high
voltage
to
cause

stronger
sparks
to

jump
the

spark

plug
gap

The

cap
is

made
of

alkyd
resin

which
offers

high

resistance

to
electric

arc
and
increased
insulation

The
resistor
in

the

ignition
coil
circuit

helps
produce

strong
sparks
from

starting
to

high
speed
full

power

operation

The
internal
resistor
limits

to
a
maximum
safe
flow
of

the

primary
current

through
the
coil
and
distributor

contact

points
Thus

it

protects
the
contact

points

during

slow

speed
operation
when

they
are

closed
for

long

intervals

The

ignition
coil
and
resistor

should
be
handled
as
a

matched
set

EE

36
SPECIFICATIONS
EE

37

@

@

@l

@

EE143

I

Primary
terminal

2

Secondary
terminal

3

Cap

4

Spring

5

Side
core

6

Primary
coil
7

Secondary
coil

8
insulator
oil

9
Center
core

10

Segment

tt

Case

Fig
EE
73
Construction

ENGINE
ElECTRICAL
SYSTEM

SPECIFICATIONS

Make
and

type

Primary
voltage
v

Spark

gap
mm
in

Primary
resistance

at
200C
680

F
n

Secondary
resistance

at
200C
680F
Kn

External
resistor

at
200C
680
F
n

Applied
resistor
HANSHIN
HITACHI

H5
15
2
C6R
601

12
12

more
than
7

more
than
7

0
28
0
28

1
17
to
I
43
l
l
7

to
I
43

11
2
to
16
8
11
2

to
16
8

l
3tol7
l
3tol7

RC
15
5560R
151O

SPARK
PLUG

CONTENTS

DESCRIPTION

INSPECTION

CLEANING
AND

REGAP
EE
37

EE
37

EE
38

DESCRIPTION

The

spark
plugs
are
of
the
resister

type
having
14
mm

0
551
in
threads
and
0
8
to
0
9
mm
0
031
to
0
Q35
in

gap

Note
All

spark
plugs
installed
on
an

engine
must

be
of

the

same
brand
and
number
of
heat

range

INSPECTION

1
Remove

spark
plug
wire

by
pulling
on
boot
not
on

wire
itself

2
Remove

spark
plugs

3

Check
electrodes
and
inner
and
outer

porcelains
of

plugs
noting
the

type
of

deposits
and
the

degree
of

electrode
erosion

Refer
to

Figure
EE
74

Normal
Brown

to

grayish
tan

deposits
and

slight
elec

trode
wear
indicate
correct

spark

plug
heat

range
SPECIFICATIONS
AND

SERVICE
DATA

TROUBLE

DIAGNOSES
AND

CORRECTIONS
EE
38

EE
39

Carbon
fouled

Dry
fluffy
carbon

deposits
on
the

insula

tor
and

electrode
were

mostly
caused

by
slow

speed

driving
in

city
weak

ignition
too
rich
fuel
mixture

dirty
air

cleaner
etc

H
is

advisable
to

replace
with

plugs
having
hotter
heat

range

Oil
fouled
Wet

black

deposits
show

excessive
oil

en

trance
into
combustion

chamber

through
worn

rings

and

pistons
or
excessive

clearance
between

valve

guides

and

stems
If
the
same

condition
remains

after

repair

use
a

hotter

plug

Overheating
White
or

light
gray
insulator
with
black

or

gray
brown

spots
and

bluish
burnt
electrodes
indicate

engine

overheating
Moreover
the

appearance
results

from
incorrect

ignition
timing
loose

spark
plugs
low

fuel

pump
pressure
wrong
selection

of
fuel
a

hotter

plug
etc

H
is
advisable
to

replace
with

plugs
having
colder

heat

range

EE
37

ENGINE

Overheating

Normal
Carbon
fould

Fig
EE
74

SpaTk
plug
Life

4

After

cleaning
dress
electrodes
with
a

small
fine
fIle

to
flatten
the
surfaces
of
both

center
and
side
electrodes

in

parallel
Set

spark

plug
gap
to

specification

5

Install

spark
plugs
and

torque
each

plug
to
1
5

to
2

0

kg

m
ll
to
15
ft
lb

6
Connect

spark
plug
wires

CLEANING
AND
REGAP

Clean

spark
plugs
in
a

sand
blast

type
cleaner
Avoid

excessive

blasting
Clean
and
remove
carbon

or
oxide

deposits
but
do
not
wear

away

porcelain
If

deposits
are

too
stubborn
discard

plugs

Mter

cleaning
spark

plugs
renew

firing
surface

of

electrodes
with
me
mentioned
above
Then

gap
spark

plugs
to
0
8
to

0
9
mm
0

030
to
0
035

in

using
a
round

SPECIFICATIONS
AND
SERVICE
DATA

Make

Model

Size
Screw
dia

x
Reach

mm
in

Plug
gap
mm
in

Tightening

torque
kg
m
ft
b

EE
38
wire

feeler

gauge
All

spark

plugs
new
or
used
should
have

the

gap
checked
and
reset

by
bending
ground
electrode

Fig
EE
75

Setting
spaTk
plug
gap

NGK

HITACHI

BP5ES
1A6PW

14
x

19
0
55
x
0

75

0

8
to
0

9
0
031
to
0
035

1
5
to

2
5
11
0
to
15
0

ENGINE
ELECTRICAL
SYSTEM

TROUBLE
DIAGNOSES

AND

CORRECTIONS

When

engine
does
not

start

If
there
is
no
trouble
in
fuel

system

ignition
system

should
be
checked
This
can
be

easily
done

by
detaching
a

high
tension
cable
from

spark
plug
starting
engine
and
observing
condition
of

spark
that
occurs
between

high

tension

cable
and

spark
plug
terminal
After

checking
this

repair
as

necessary

Length
of

Trouble
location
Cause
Remedies

spark
gap

No

sparks
at
all
Distributor

Defective
insulation
of
condenser

Replace

Breakage
of
lead
wire
on
low
tension
side

Repair

Defective
insulation
of

cap
and

rotor
head

Replace

Point
does

not

open
or
close

Repair

Ignition
coil
Wire

breakage
or
short
circuit

of
coil

Replace
with
new

one

High
tension
cable
Wire

coming
off

Repair

Defective
insulation

Replace

I

to
2
mm

0
0394
Distributor
Point

gap
too
wide

Correct

to
0
0787
in

or

Oil

sticking
on

point
Clean

irregular

Point
burnt

too
much

Replace

Less
than
6

mm
Spark
plugs
Electrode

gap
too
wide
Correct
or

replace

0
2362
in

Too

much
carbon
Clean
or

replace

Broken
neck
of
insulator

Replace

Expiry
of

plug
life

Replace

2

When

engine
rotates
but
does

not
run

smoothly

In

this
case
there

are

many
causes
resulting
from
the

ignition
system
and

other

engine
conditions

not
related
to
ignition
Therefore
first

complete

inspection
of

ignition

system
should
be
carried
out

EE
39

Troubles

Engine
misses

Engine
causes

knocking
very

often

Engine
does

not

give
enough

power
Trouble
location

Distributor

Ignition
coil

High
tension
code

Spark
plugs

Distributor

Spark
plugs

Distributor

Spark
plugs
ENGINE

Causes

Dirty
point

Improper
point
gap

Leak

of

electricity
of

cap
and
rotor
head

Defective
insulation
of
condenser

Defective
arm

Defective

spring
of
arm

Breakage
oflead
wire

Worn

out
or

shaky
breaker

plate

Worn
out
or

shaky
distributor
shaft

Layer
short

circuit
or
use
of

inferior

quality

Deterioration
of

insulation
and
leak

of

electricity

Dirty

Leak
of

electricity
at

upper
porcelain
insu

lator

Improper
and
advance

timing

Coming
off
or

breakage
of

governor
spring

A

pin
or
a

hole
of

governor
portion
worn

out

Burnt
too
much

Improper
and
retarded

timing

Defedive
function
of

governor

Dirty
point

Point

gap
too
narrow

Dirty

EE
40
Remedies

Clean

Correct

Repair
or

replace

Replace

Oil
shaft

Replace
assembly

Replace

Replace
assembly

Replace
assembly

Replace
with

good

one

Replace

Clean

Repair
or

replace

Correct
the

fitting

Correct
or

replace

Replace

Replace

Correct
the

fitting

Replace
assembly

Clean

Correct

Clean