1968 DATSUN 510 Service Repair Manual

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Page 113 of 252

DATSUN 510 1968 Service Repair Manual
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
Br

Page 114 of 252

DATSUN 510 1968 Service Repair Manual
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

Page 115 of 252

DATSUN 510 1968 Service Repair Manual
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
ga

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

Page 116 of 252

DATSUN 510 1968 Service Repair Manual
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

Page 117 of 252

DATSUN 510 1968 Service Repair Manual
112

Table
1
CHAPTER
NINE

DISTRIBUTOR
SPECIFICATIONS

POint

gap

POint
pressure

Shaft
diameter
lower

part

HOUSing
Inner
diameter

Clearance
between
shaft
and

hOUSing

Ammendment
li

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

Page 118 of 252

DATSUN 510 1968 Service Repair Manual
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

Page 119 of 252

DATSUN 510 1968 Service Repair Manual
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

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

Page 120 of 252

DATSUN 510 1968 Service Repair Manual
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
silenc

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