DATSUN 510 1968 Service Repair Manual

106
CHAPTER
NINE

@

Igmtlon
switch

IgnItion

plug

engine

Condenser

IgnItIon
cod

@

II

9

ft

O

CHECKING
AND
ADJUSTMENT
foreIgn
matenal
or
cracks
Qean
the

cap
thor

oughly
Replace
it
If
cracks
are
found

Inspect

the

hIgh
tensIon
cables
to
see
that
all
connectIons

are

firmly
made
and
that
the
cables
are
not

cracked

Replace
any
defective
cables
Do
not

try
to

tape
or
mend
them
Cap
and
Rotor
Head

The

cap
and
the
rotor
head
must

always
be

kept
clean

to

prevent
lugh
voltage
leaks

Inspect

the

cap
penod1cally
for

SIgnS
of
carbon

bwldup

24
21

TO
oto
25
1
17
18
19
o
15

16

20
@

1
IgnItIon
coIl

2
Ignlllon
COIl
resls
Ol

3
p
II
lS
sere
ll

4
spnng
lles1
Br

5
PlaIn
wesner

6
illstl
OUtor
assembly

1
illstllbu
Ol
sUP
rt

II
sere
ll

9
spnng
wesner

10
0
ling

11
Ills
nbutor
gasket

12
llolt

13
VaCUum
control
tube

14
Vecuum
tube
grommet

IS
spar
plug
IIeslIer

1
sperll
plug

11
111gb
tenSIon
cable

18
IIlglllenSIOn
cable

19
lI
gll
tensIon
cable

20
IIlgII
tensIon
cable

ii
lIlgII
tenSion
cable

22
Ceble
older

23
Cable
c1emp

24
cable
clempllOlder

25
Ceble
clemp
J

9
10
4
17
141

18
I

19

21

8
@

1
Distributor
cap
clamp

2
Shaft
assembly

3
Thrust
washer

4
Governor
weight
assembly

5
Governor
spring

6
Cam
assembly

7
Screw

8
Shaft
coupling
assembly

9
Breaker
assembly

10
Contact
POint
assembly

11
Ground
wire
assembly

12
Lead
wire
assembly

13
POlntset
screw

14
Screw

15
Terminal
assembly

16
Rotor
head
assembly

17
Dlstllbutor
cap
assambly

18
Vacuum
control

19
Screw

20
Condensar

21
fixing
plate

22
Bolt
e
OIl

21
b
14

1
8

6

L
5
@

21
1
Dlstllbutor
assembly

2
Shaft
assemblY
set

3
tbrust
washer
set

4
Go
ernor
W81g1lt

5
Govemor
BPllng
set

6
Cem
assemblY
set

1
co
leT5at

8
Breeker
plete
essembly

9
Eartn
Wile
essembly

10
contect
set

11
lead
Wile
essemblY

12
lead
Wile
assemblY

13
Rotor
need
assembly

14
Condenser
essembly

15
Condensor
essembly

16
lemllna
BSSembly

11
lennlnel
BSSembly

18
Vacuum
control
assemblY

19
Cep
essemblY

20
Carbon
pOint
essemb

21
set
screVl

12
i

110

CHAPTER

NINE

Points

Figure
S8

gives
details
of
the

sIngle

pomt

system
The

pomts
should
be

Inspected
penod

Ically
for
condItIon
and

wear
At
the

same
tlme

the

pOInt
gap
should
be
checked

and
reset
1f

necessary
Pomts
should
be
checked

at
least

every
2
500
mIles

SET
SCREW

PRIMARY

LEAD

TERMINAl

@

1
Unhook
the
two

clamps
holdmg
the

distnbu

tor

cap
to
the
dIStrIbutor

2
Remove
the
dlstnbutor

cap
and

pull
the
rotor

off
of
the
center

shaft

3

Carefully
note
or
mark
the

pOSItIon
of
the

dIStrIbutor

relatIve
to
the

fixmg
plate
at

the

bottom

of
the

distrIbutor

4
Loosen
the

hold
down
bolt
at
the
bottom
of

the
dlstnbutor

and
rotate
the
dIStnbutor

untIl

the

rubbmg
arm
that
rests
on
the
dIStrIbutor

cam

IS
at
a

high
pomt
of
the

cam
At

that

pomt
the

pomts
should
have

a

gap
between
them

5

Inspect
the

general
condItion

of
the

pomts

for
wear

pIttIng
and
smoot1mess

Pomts
that
are

worn

excessIvely
or
are

badly
pItted
must
be

replaced
Pomts
In

good
condItIon
can
be

re

surfaced

With
a

pOInt
file
number

600
sand

paper
or
WIth
a
small
whetstone

6
To

replace
or

remove
the

pomts
from
the

dIStrIbutor
loosen
the

screws
at
the
contact
arm

and

pnmary
lead

connectIOn
Do
not
remove
the

screw
Pull

up
on
the

primary
lead

to

dISc
onnect

the

termmal
from
the
contact
arm

7
Loosen
the
screw

holdmg
the

ground
WIre
to

the

pOInt
assembly
and

remove
it

S
Loosen
and

rell
ove
the
screws

holdIng
the

pomt

assembly
to
the

dIStnbutor
breaker

plate
Remove
the

pOInt
assembly
from
the
dIStrIbutor

Inspect
condItIon
of
the

pOInts
and

reconditIon

or

replace
as

reqUIred

9

Replace
the

points
Make
certain

to
recon

nect
the

ground
WIre
and
the

pnmary
lead

Apply

3

trace
of
cam

lubncatlng

grease
to
the
cam

upon

reassembly

10
WIth
the

pOInts
open
adjust

gap
It
should

be
between
00177

to
00217
In
045
to
055

mm

11
Install
the
rotor

put
the

cap
on
the
dIStribu

tor
secure
the

clamps
and
return
the
dtstrIbutor

to
its

onginal
pOSItIon
TIghten
the
hold
down

bolt

CONDENSER

PeriodJcally
check

the
condenser
electrIcal

lead

wire
and

the
set
screw
connectIon
As
a

matter
of

good
practIce
replace
the
condenser

whenever
the

pomts
are

replaced

DISTRIBUTOR

DISASSEMBLY

1
Take
off
the
dIstrIbutor

cap
and

remove
the

rotor

2
DIsconnect
the

vacuum
me
from
the
vacuum

con
troller

3
Mark
the

pOSItIon
of
the
distrIbutor
relative

to
the

housmg
remove
the
bolts
and
lIft
the

dIstrIbutor

off

4

Take
off
the
vacuum
controller
as
shown
m

F1gDre
S9

@

J

I

v

o

o
o

o

5
Remove
the
contact

pOInt
assembly
as

pre

VIously
descnbed

6
Remove
the

c01Jtact
breaker

assembly
Figure

60

by

remOVIng
the

clIps
that

hold
It
m

place

Be
careful

not
to
lose
the
steel
balls
located
be

tween
the
breaker

plate
and
breaker

springs

ENGINE
ELECTRICAL
SYSTEM
111

@

7
WIth

a
hammer
and

punch
knock
out
the

pm
holdmg
the
collar
set
to
the
shaft
Be
certain

to
mark
the
relatIve
locatIon
of
the
collar
set
to

the
shaft
before
removal
See

Figure
61

@

8
Remove
the
shaft
and
cam
as
shown
m

Figure
62

@

V
t

0

ao
9
Remove
the
cam

by
removmg
the
set
screw

at
the

top
of
the
shaft
and

pulling
the
cam
off

Be
certam
to
mark
the
cam
location

relatIve
to

the
shaft
before
removal
See

Figure
63

@

10

Inspect
all

parts
carefully
for

SIgnS
of
wear

or

damage
Replace
defectIve

parts

Assembly
of
the
dIStrIbutor
IS
the

reverse
of

disassembly
Make
certam
all

parts
are
rein

stalled

m
the
same
relative
location
to
the
shaft

1S
when
removed
Refer
to

Figure
64
for

setting

the

governor
springs
and
cam
See
Table
1

page

112
for
Distributor

SpecIficatIons

@
5

2

3

1
Go
emor

Welgbt
5
Carn

plate

2
Clearance
lor

advanCing
6

Welgbt
pin

angle
7
Circular
hook

3

Rectangular
hook
8
Governor

spnng
A

4
Go
ernor

spnng
8
9
Rotor

posltlomng
lip

IGNITION
COIL

The

IgnItion
COllIS
shown
m

Figure
65
and

IS
a
HItachI
model
C
14
51

Repair
of
the

IgnitIon

112

Table
1
CHAPTER
NINE

DISTRIBUTOR
SPECIFICATIONS

POint

gap

POint
pressure

Shaft
diameter
lower

part

HOUSing
Inner
diameter

Clearance
between
shaft
and

hOUSing

Ammendment
limit
ot
clearance

Shaft
diameter

upper
part

Cam
Inner
diameter

Clearance
between
shaft
and
cam

Weight
piVOt
dIameter

Weight
hole
dIameter

Clearance
between
piVOt
and
hole
Inches
Millimeters

00177
00217

1
10
143
Ibs

o
4902
0004

0008

o
4902
0
0007

o

00004
00015

00031

03150
0002

0006

03150
0
0006

o

00002
00011

o
1969
00004

00010

01969
0
0007

o

o
0004
0
0018
o
45
0
55

o
50
0
65

kg

1245
010

0020

1245
0
018

o
OlD
O
038

008

8
005

014

8
0
015

o

o
005
0
029

5
010

028

5
0
018

0

001
0046

@
@

r
COllIS
not

pOSSIble
and
It
must
be

replaced
1f

found
defectIve

Inspect
the
connectIons
to
the

coll
to
make
certaIn

they
are
clean
and

tIght

Inspect
the

top
of
the
coIl
for

SIgnS
of
cracks
or

damage
and

replace
1f

necessary
The

Ignluon

COllIS
located
on
the
left
SIde
wall
of
the

engme

compartment
and
is
held
In

place
by
two
screws

and
washers

SPARK
PLUGS

The

followmg
spark
plugs
or
then

equivalent

are

recommended
for
the
L16

engme
ChampIon

No
NlOY
AutolIte
No
AG32A
AC
No

44XL
and
NGK
No
BP
6E

Figure
66
shows

spark
plug
constroctIon

They
should
be
re
RING

CENTER
ELECTRODE

TERMINAL
NUT
IS

r

1
n
f

INSULATOR

moved

penodlcally
and

inspected
for

general

condItIon

cleanmg
or

replacement
anl

regap

pmg

Figure
67

IS
a
senes
of

photos
that
show
the

appearance
of
and

pOSSIble
causes
of

spark
plug

problems
If
the

spark

plugs
are
still
usable

they

should
be
cleaned

thorougWy
with

a
sand
blast

Ing
type
cleaner
The
electrodes
should
then
be

filed

flat
and
the

plug
regapped
The

proper
gap

IS
0
031
to
0035

m
0
8
to
0
9mm
Never
use

a

spark
plug
that
has

a

damaged
or
cracked

msulator
Use
extreme
care
when

remOVIng
and

mstallmg
spark
plugs
to

keep
from

crackIng
the

msulator

Always
bend
the

ground
electrode

when

settmg
the

plug
gap
Never
bend
the
center

electrode

ENGINE
ELECI
RICAL

SYSTEM

113

i

Normal

plug
appearance
noted

by
the
brown

to

graYlsll
lan

depOSits
and

slight
eleclrode

wear
This

plug
indicates
the
correct

plug
heal

range
and

proper
air
fuel

ratio

jI

Jo

t
Ql
i

Carbon

fouhng

distinguished
by

dry
fluffy
black

carbon

depOSits
which

may
be
caused

by
an

over

rich

alr
lue
mixture
excessive
hand

choking

clogged
air

filler
or
excessl
e

Idling

t
I

j
if

r
l

1

tfc
ji

0
1

fouling
indicated

by
wet

o
ly
depOSits
caused

by
011

pumping
past
worn

rings
or
down
the
Intake

valve

gUIdes
A
hotter

plug

temporanly
reduces

011

depOSits
but
a

plug
that
IS

too
hot
leads

to

pre

Ignition
end

possible

engine
damage
@

Red
brown

yellow
and
white

coatings
caused

by

luel
and
011
addltl

es
These

depOSits
are

not
harm

ful
If

they
remain
In
a

powdery
lorm

pr

11

L
J

J

S

C

ShinY
yellow

glaze
on
Insulalor
cone
IS

caused
when

the

powdery

depOSits
from
fuel

and
011
addltl
es

melt

Melting
occurs

during
hard

acceleration
alter

prolonged
Idling
This

glaze
conducts

electnclty

and

shorts
out
the

plug

e

1

A
I

A

I

7

Overheated

plug
indIcated

by
burned

or
blistered

Insulator

tiP
and

badly
worn
electrodes
ThiS
condl

J

tlon

may
be

caused

by
pre
Ignition

cooling
system

defects
lean
alr

luel
ratiOS
low
octane
luel

or
o
er

advanced

Ignition
timing

Spark
plUI
condition

photos
courtesy
of
AC

SPIr1l
Plug
Olv
s
on

Gene
MolDrs

Corporlllon

CHAPTER
TEN

EMISSION

CONTROL
SYSTEM

ThIs

chapter
covers
emission

control
and

exhaust

systems
The
emission

devices
used
in

clude
crankcase
ermssion

controls
an
exhaust

ermssion

system
and

evaporative
emission
con

trols

EXHAUST
EMISSION

CONTROL
SYSTEM

Two
methods
of
exhaust
emission

control
are

used

on
the
Datsun

One
is

an
aIr

injection

system
the
other
consists

of

engine
modifica

tIons
Datsuns

were

equipped
With
the
air

injec

tIon

system
only
through
1970
SInce
then
all

models

have
combined
aIr

mjection
with

engine

modIficatIons
EmisSIon

servicing
IS

complex

and

should
be
left
to

qualIfied

professionals

Figure
1

Illustrates
the

system
used

through

model

year
1969

Figure
2
IS
the

system
used

after
1970

Figures
3

through
7
offer
detaIls
of

various

emission

components

Maintenance
and

Testing

Penodlc

mspection
and
service

should
be

done

every
12
months

or
12
000
miles
The

engine
must
be

in

good
working
order
to
main

tain

a
low

level
of
harmful
emissions
There

fore

perform
a

general
tune

up
as

spec1fied
in

Chapter
Four
before

followmg
the

procedures

below
CRANKCASE
EMISSION

CONTROL
SYSTEM

The
crankcase

emission
control

system
is

shown
in

FlgDre
8
It
IS
a
closed

system
that

pre

vents
crankcase

gases
from

escaping
to
the
at

mosphere

Blowby
gases
are
dIrected

to
the

intake

manifold

through
the
ventilation

control

valve

Normally
capacity
of
the

valve
is

suffi

cient
to
handle
the

blowby

gas
plus
a
small

amount
of

ventIlating
air
drawn
from
the

air

cleaner

through
a
tube

leading
to
the
crankcase

Under
fun

throttle
condItIons
manifold
vacuum

is

Insufficient
to
draw
the

blowby
through
the

valve
When
this

happens
b10wby
flows

through

the

system
In
the
reverse
dIrection

General

1
Start
the

engine
and

bring

up
to

operating

temperature

2
Check

hoses
and
hose
connections
for

leaks

3

Examine
the
hoses
for

signs
of

cracks
or
de

terioraoon

Replace
as

required

Crankcase

Ventilation

Control
Valve

1
Start
the

engme

2
Remove

the
ventIlator
hose
from
the
crank

case
ventilatIon
control
valve
A

htssmg
nOISe

27
10
13
49

j
l

e
1
1

31
33
22

@
@
25

f
1
d

37
36
6

40
ell
o
z
o
o
t

1
Hose
clamp

3
Hose
clamp

4
Connector
pipe

5
Hose
connector

7
Air
pump
With
pulley

8
Air
pump
silencer
assembly

9
Air
pump
pulley

10
Bolt

13
Spring
washer

14
Check
al
e
assembly

15
Anti
backfire
alve

16
Connector
tube

20
Air
gallery
pipe

22
Air
pump
bracket

23
Hex
bolt

25
Spring
washer

27
Adjusting
bar

31
Air
pump
bolt

33
Spring
washer

36
Plain
washer

37
Hex
nut

39
Air
cleaner
to
all
pump
hose

40
All
pump
to
control
al
e
hose

41
Air
pump
to
anti
backfire
val
e

hose

42
Anti
backfire
al
e
hose

44
Hose
clam
p

46
Hose
clam
p

47
Hose
clamp

49
Air
pum
p
belt

50
Rocker
co
er
to
air
cleaner
hose
VI