check engine DATSUN 510 1968 Service Owner's Guide

EMISSION

CONTROL
SYSTEM
117

ENGINE
EMISSION
CONTROL
COMPONENTS

CD

1
Relief
valve

2
Air

pump

3
Check

valve

4
Anti
backfire

valve

AIR
INJECTION
SYSTEM

CD

SILENCER

CHECK
VALVE

NOZZLE

c

122

CHAPTER
TEN

1
Start
the

engIne
and

bnng
It

up
to
normal

operatIng
temperature

2

Inspect
all
hoses
and
connectIons
for
leaks

and
detenoratIon
Shut
off
the

engme
Replace

any
defectIve
hoses

3
Remove
the
hose
attached
to
the
check

valve

4

VIsually
Inspect
the

posItIon
of
the
valve

plate
InsIde
the

valve

body
See

Figure
10
It

should

be

lIghtly
posItIoned
agaInst
the

valve

seat

away
from
the
aIr
dlstnbutor
manifold

5
Insert
a

probe
Into
the
valve
connectIon
on

the
check
valve

Depress
the
valve

plate
It

should
return

freely
agaInst
the
valve
seat
when

released

6
Leave
the
hose
dISconnected
and
start
the

engme

7

Slowly
Increase

engine
speed
to
1
500

rpm

Watch
for
exhaust

gas
leakage
at
the
check

valve
There
should

not
be

any
The
valve

may

flutter

or
VIbrate
at
Idle

speeds
ThIS
IS
normal

Replace
the
valve
u

defecuve

Anti
Backfire
Valve

1
Start
the

engme
and

bnng
to

operating

temperature

2

Inspect
all
hoses
and
hose
connectIons
for

leaks
and
detenoratIon

Replace
as

required

3
DIsconnect
the
hose
at
the
antI
backfire

valve

leading
to
the
Intake

manuold
Insert
a

plug
ill

the

hose
and
fasten

securely

4

Open
and
close
the
throttle
valve

rapidly
See

Figure
11
Place
a

finger
over
the
valve
outlet
to

the

m
take
manuold
If

arr
flow
IS
felt
for

one
to
two
seconds
the
valve
IS

functIonIng

properly

If
there
s
no
aIr
or
If
the
flow
is
felt
for
more

than
two
seconds
the
valve
IS
defectIve
and
must

be

replaced

5
Connect
the
alr
hose
to
the
mtake
manuold

after

remOVIng
the

plug

6
DIsconnect
the
aIr
mlet
hose
from
the
air

pump
at
the
antI
backfire
valve
If
the

engine

Idle

speed
changes
excessIvely
the
valve
is
de

fectIve
and
must
be

replaced

Air

Pump

1
Check
the
atr

InjectIon
pump
belt
tension

DeflectIon
of
the
belt
should
be
0
5
In
when

pushed
In

by
thumb

pressure
Adjust
belt
u

necessary

2

Operate
the

engme
untIl
normal

temperature

IS
reached

3

Inspect
all
hoses
hose

connectIons
and
the

arr

gallery
for

SIgnS
of

leaks
or
detenoratIon

Replace
as

required

4
DIsconnect
the
air

supply
hose
at
the
check

valve

5
Insert
the

open
pipe
end
of
a

pressure
test

gauge
adapter
Into
the
air

supply
hose
See

Fig

ure
12

Clamp
the

adapter
firmly
to
the
hose

Install
the

pressure
test

gauge
to

the

adapter

PosItIon
the

adapter
and
test

gauge
so
that
the

alr
blast
emitted

through
the
dnlled

pipe
plug

Will
be

harmlessly

dislppated

6
Install
a
tachometer

on
the

engme
WIth
the

engIne
speed
set
to

1
500

rpm
observe
the

pres

sure

readmg
AIr

pressure
should
be
0
47
m

Hg

16mm
Hg

EMISSION
CONTROL
SYSTEM
123

7
If
the

pressure
does
not
meet

reqwrements

dISconnect
the

aIr

supply
hose
to
the
antI

backfire
valve

Clamp
a

plug
mto
the
hose
and

repeat
the

pressure
test

8
If
the
air

mJection
pump
does
not
meet
the

pressure
specIfication
It
should
be

replaced

NOTE

Repair
of
the
air

injection

pump
is

possible
but
have
the

lob

done

by
your
dealer

9
Close
the
hole
of
the
test

gauge
by
finger
With

the

engme
runnmg
at
1
500

rpm
See

Figure
13

If
a

leakIng
sound
is
heard

or

leakIng
air
is
felt

at
the
relIef
valve
the
relIef
valve

IS
defectIve

RepaIr
or

replace
as

reqUIred
ENGINE
MODIFICATIONS
SYSTEM

Testlng
and
mamtenance
of
the
sWitches

relays
and
solenOIds

comprismg
the

engine

modIficatIons

reqwres
SpecIal
knowledge
and

test

eqUIpment
If
the
mechanic

suspects
that

troubles
eXist
In
these

parts
check
With

a
dealer

Mamtenance
of
the
dIstrIbutor
breaker

points

and

tImmg
of

engines
is
covered

m

Chapter

Four

EVAPORATIVE
EMISSION

y
CONTROL
SYSTEM

f

Detailed
informatIon

on
the
fuel

tank
and

connecting
fuel
lines

IS

given
In

Chapter
Seven

EXHAUST

SYSTEM

Figures
14
next

page
15

page
125
and
16

page
126

are

exploded
VIews
of
the
exhaust

systems
Figure
14

applIes
to
the
sedan

FIgure

15

to
the

wagon
and

FIgure
16
to
the

pIck
up

The

system
in
sedans
and

wagons
consists
of

the
front
tube

pre
muffier
center
tube
rear

tube
mam
muffier
and
tail

pipe
The

pick

up

exhaust

system
mcludes
the
front
tube
muffier

and
rear
tube

Removal
Sedan
and

Wagon

1
Loosen

clamps
at
the
front
tube
center
tube

and
mam
muffier
connectIons
See

Figure
17

2
DIsconnect
front
tube
and
exhaust

manifold

flange
connection

3
Remove
units
from

vehicle

138
CHAFfER
ELEVEN

to
dram

plug
Use
a

block
of
wood
between
the

011

pan
and
the

Jack

16
Remove
two
bolts

attaching
the
transmIS

sion
to
the
rear

engine
mount
Place
a

Jack
under

the
transmISSIon
and

support
the

transmissIOn

Remove
four
bolts

holdmg
the
rear

engme
cross

member
to
the

body
sedan
and

wagon

17
Place
a

Jack
under
the
transmISSIon
and

sup

port
the
transmISSIon
Remove
rear

engine

mount
from
transmlssiod
and
cross
member
as

shown
In

Figure
22

pIck
up

18
Lower
the

supporting
jacks
to
mclme
the

engine
downward
and
there
IS
sufficient
room

to
remove
the
transmission

19
Pull
the
transmission
towards
the
rear
until

the
dnve
shaft

splme
IS
clear
of
the
clutch

pres

sure

plate
Be
careful
not
to

damage
the

splines

or
the

pressure
plate

6

40

t

I
j

fI
1
2

fr

l

3332

3

1
TransmiSSion
case

2
TransmiSSion
case

3

Thread
taper
plug
t

4
TransmiSSion
Iront
cover

5
Front
cover
011
seal

6
Front

cover
gasket

7

fixmg
bolt

8

Flxmg
bolt

9

Spnng
washer

10
Rear
extension

11
Reer

extenSIon
011
seal

12
Breather

assembly

13
Extension
bushmg

14
Extension

gasket

15
Hex
bolt

16
Hex
bolt
17

Spllng
washer

18
Dowel

pm

19

Beallng
retainer

20
Hex
bolt

21

Spnng
washer

22
Bottom
cover

23
Bottom
cover

gasket

24
Bottom
cover
hex
bolt

25

Spnng
washer

26
Drem

plug
essembly

27
Dram

plug
assembly

29
SwItch

30
Hex
bolt
l
r

I

J

J
I
n

S
T

r
re
l

1
Rear
extension
mountmg
bolts

2
Rear

engme
mounting
bolts

20
Remove
the
transmISsion

by
lowenng
the

transmISsion

Jack

Transmission

Disassembly

Figures
23
and
24
are

exploded
views
of
the

transrmSSlon
case
and

gear
assembly

@

46

47
6

i

4826J

1
41

44

5

31

Spring
washer

32
Hex
bolt

33

Spnng
washer

34
Check
ball

35
Check
ball

spnng

36

Plunier

37

Plug

r

38

P1
g

39
Washer

o
12

10

13

11

40
MaIO
dllve

beanng
retamer

41
Pinion

42
PInion
sleeve

43
Sleeve
011

seal

44
O

lIng

45
Retamer

46
Lock

plate

47

Spnng
washer

48
Hex
bolt

50
Neutral
SWitch

51
Dust
co
er

52
Hex
bolt

53

Sprmg
washer

144

CHAPTER

ELEVEN

TAANSMISSlON
SERVICE
DATA
AND
SPECIRCATIONS
Table
2

r

General

SpecificatIOns

Gear
Ratlo

1st

2nd

3rd

4th

Reverse

011

capacity

Detail

SpeCIfications

Gear
backlash

Replacement
standard

Gear
end

play

Balk

ring
cone

clearance

Replacement
standard
5
tl
viV

t
O

5
0

If

3657

2558

1419

1000

3638

3
6

pints

Tightening
Torque
ft
Ib

kg
m

Engine
transmission
installation
bolt

Front
cover

transmission
installation
bolt

Rear
extensIon
transmIssion
installation
bolt

Main
shaft

tlghtel
lng
bolt

Companion
flange
tightening
nut

Rear

engine
mount
installation
bolt

Filler

plug

Drain

plug

Back

up
lamp
sWItch

Bottom
cover
bolt

Speedometer

pinion
bolt

Interlock

plug

Operating
lever

Reverse
check

Control
lever
installatIOn
bolt
00020
to
0
0039
In

005
to
0
10mm

o
0079
In

0
20mm

o

0020
to
0
0059
In
0
05
to
0
15mm

00472
to
0
0630
In

1
2
to
1
6mm

00315
In

08mm

174
to
20
2
24
to
2
8

5
8
to
7
2
0
8
to
1
0

10
1
to
130
1
4
to
1
8

57
8t079
5
80to
11
0

72
3
to
101
2
100

to
140

239

to
27
5
3
3

to
38

18
1
to
25
3
25

to
3
5

14
5

to
21

7
20

to
3
0

14

5
to
21
7
2
0
to
3
0

5
8

to
7
2
0
8

to
1
0

2
2
to

2
9
03
to

0
4

123
to
15
2
1
7
to
2
1

22

to
2
9
0
3

to
0
4

14

5
to
21
7
20
to
3
0

13
7
to

15
9
1
9
to
2
2

DRIVE
SHAFf

Descripti

ll

TIie
dnve
shaft

on
the
sedan
and

wagon
is

a

smgle
plece
tubular

steel
unit
The

pick
up
uses

a
two

pIece
umt

Joined
by
a

Journal
assembly

unIversal

Joint
UnIversal

Jomts
connect
the

drive
shaft
ends
to
the
transmissIOn
and
d1f

ferentIal
The

Jomts
consist
of
the

Journal
as

sembly
yoke
sleeve
and

yoke
flange
Figure
40

is
an

explOded
VIew
of
the
dnve
shaft

used
on

the

sedan
and

agon
Figure
41

page
146

shows
the

dnve
shaft
used
on
the

pIck
up

The

pIck
up
has
a

grease
mpple
on
the

dnve

shaft
to
lubncate
the
dnve
shaft

spline
The

sedan
and

wagon
are
not

so

equipped
The
uni

versal

Jomts
shouldebe
removed
and

lubncated

every
24
000

rmles

Removal

1
Release
the
handbrake

j
2
Jack

up
the
rear
of
the
vehIcle
and

support

on
stands

3
Loosen
the
end

clamps
on
the
exhaust

pipe

and
turn
the
exhaust

pIpe
and

premuffier
to
the

left
so
that
dnve
shaft
can
be

removed
sedan

4
Remove
handbrake
rear
cable

adjustIng
nut

from
the

adjuster
DIsconnect
left
hand
cable

from
the

adjuster
sedan

5
DIsconnect

rear

flange

yoke
from
the
com

panIon
flange

by
removmg
the
nuts
and
bolts

See

Figure
42

CAUTION

Be

careful
not
to
let
end

of
dnve

shaft

drop
to

ground
Lower

It

gently

6
Pull
the
dnve

shaft

backwards

away
from
the

transmISSIon
Remove
the
dnve
shaft

as
soon

as
It
IS
clear
of
the
transmISSIon
Make

cert
n
to

support
both
ends
of
the

shaft

duriftgi
mb

sedan
and

wagon
v

4
1tr
l

t

t

BODY

ELECTRICAL

SYSTEM

217

bulb

socket
must

be

pulled
out
from
the
back

of

the
unit

and
then
the
bulb
can
be

replaced
Care

fully

mspect
the
unit
that

reqUIres
bulb

replace
ment
and
follow
the

appropriate

procedure

Make

certain

you

replace
the
bulb

with
one

rated
at
the
same

voltage
amperage
and
watt

age
Examples
of

units
that

might

require
bulb

replacement
are
the
front

park
and

directional

lamps
rear

combination

lamp
side

marker

lamps
interior
room

lamps
license

plate
lamps

and

engine

compartment
lamps

Fuse

Replacement

Whenever

a
fallure
occurs

m

any

part
of

the

electrical

system
always
check
the

fuse
box
to

see
1f

a
fuse
has
blown
The
fuse

box
is
located

on
the

firewall
within
the

engine

compartment

If
a
fuse
has
blown
It
will
be
eVident

by
bIacken

mg
of
the
fuse
or

by
a
break
of
the

metal
element

Within
the
fuse

The

wiring
diagrams
below

mdIcate

the
cir

cuits

that
are
connected

to
each
fuse

Before

replacing
a
fuse

always
detenIlIDe
what
caused

it
to
blow
and
correct
the

trouble

Never

replace

a
fuse
With
one
of

a

higher

amperage
ratIng
than

originally
used
Never

use
tmfOll
or
other
ma

tenal
to

Jump
across
fuse

tenIlIDals

Failure
to

follow
these

basic
rules

could
result
in

fire
or

damage
to

major
components

WIRING

DIAGRAMS

The

following
figures

provide
wiring
diagrams

for
the
sedan

wagon
and

pick
up
Figure
20

page
220

applies
to
the
sedan
and
station

wagon
with

manual
transmission

Figure
21

page
221
covers
the
sedan
and

station

wagon

With
automatic
transmission

Figure
22

page

222
is
for
the

pick
up
I