fuel DATSUN PICK-UP 1977 Owner's Manual

2
Turn
crankshaft
until
No
I

pis

ton
is
at
T
D
C

on
its

compression

stroke

3
Make

sure
thai
camshaft
sprock

et
location
notch
and

plate
oblong

groove
are

aligned
at
their
correct

positions

4

When

installing
cylinder
head

make
sure

that
all
valves
are

apart

from
heads
of

pistons

5
Do

not
rotate
crankshaft
and

camshaft

separately
or
valves
will
hit

heads
of

pistons

6

Temporarily
tighten
two
bolts

CD

V
sJiown

in
Fig

re
EM
96

Tightening
torque

2

kg
m

14
ft
b

15
Install
crankshaft

sprocket
and

oil

pump
drive

gear
and
fit
oil

thrower

Note
Make
sure
lhat

maling
marks
of

crankshaft

sprocket
face
10
Cront

16
Install

timing
chain

Noles

a
Make

sure
that
crankshaft
and
cam

shaft

keys
point

upwards

Fuel

pump
drive

earn

2
Chain

guide

3

Chain
tensioner

4

Crank

sprocket

5
earn

sprocket

6
Chai

guide

EM439

b
Set

timing
chain

by

OOgning
its

mating
marks
with
those
oC
crank

shaft

sprocket
and
camshaft

sprock

et
at
the

right
hand
side
There
are

forty
four
chain
links
between
two

mating
marks
of

timing
chain

c
NO
2
hole
is

Cactory

adjusted

When
chain
stretches

excessively

adjust
camshaft

sprocket
at

No
3

hole

d
Use
a

set
of

timing
marks
and

location
hole

numbers
Engine
Mechanical

17
Install
chain
slack
side

guide
to

cylinder
block

18
Install
chain
tensioner

Note

Adjust
protrusion
oC
chain
ten

sioner

spindle
to
0
mm
0
in

Fig
EM
98

lmtalling
chain
tensioner

19
Press
new
oil
seal
in

front
cover

Notes

a
Front

cover
oil
seal
should
be
reo

placed
when
Cront
cover
is

disas

sembled

b
BeCore

pressing
oil
seal
into
Cront

cover

give
coating
of

engine
oil
to

periphery
of
oil
seal

c
This
oil
seal
is
a
threaded
seal

type

which
has

improved
sealing
charac

teristics
Do
not

apply
grease
to

sealing

lip

20
Install
front
cover
with

gasket
in

place

1

Timing
mark

2

Timing
mark

EM545

Fig
EM

99

Installing
fronl
COlHlr

Notes

a

Apply
sealant
to
Cront
cover
and

corners
oC

upper
section
of

cylinder

block

as
shown

in

Figure
EM
78

EM
24
b
Install
Cront
cover
with
head

gasket

in

place

c

Check

height
diCCerence
between

cylinder
block

upper
Cace
and
Cront

cover

upper
Cace
DifCerence
must

be
less
than
0
15

mm
0
0059
in

d

Note
that
difCerent

types
oC
bolts

are
used

e

Before

installing
front
cover
on

cylinder
block

apply

coating
oC

engine
oil
10

sealing
lip
of
oil

seal

EMS11

Fig
EM
lOD
Front

cover
bolts

Tightening
torque

Size
M8
0
315
in

1
0
to
1
3

kg
m
7

2
to
9
4

ft
lb

Size
M6
0
236
in

0
4
to
0
6

kg
m
2

9
to
4

3
ft
lb

21
Install
crankshaft

pulley
and

water

pump
assembly
then
set
No
I

piston
at
ToO
C
on
its

compression

stloke

Crankshaft

pulley
nu
I

tightening
torque

12
to
16

kg
m
B7
to
116
ft

lb

EM546

Fig
EM
Ol

lnstallingcran
haft

pulley
and

water

pump

22

Finally

tighten
head

bolts
to

the

specified
torque
in

three

steps

according
to
the

lightening
sequence

shown
in

Figure
EM
96

Note
thai
Iwo

types
of
bolts

are

used

Speci
ol

Cylinder
Head
Bolt

Wren
h

8110120000

Tightening
torque

1st
turn

4

0

kg
m
29

ft
lb

2nd
turn

6
0

kg
m
43
ft
lb

3rd
turn

6
5

to
8
5

kg
m

47
to
61
ft
lb

B
O

A

A

B

A

A
B
O

B
O

R
O

EM
176

Fig
EM
I02

Cylinder
head
boll

Notes

a
Be
sure
to

tighten
two
small
bolts

b
After

engine
has
been

operated
for

several
minutes

retighten
if
neces

sary

23
Install
oil

pump
and
distr
butor

driving

spindle
in

front
cover

Tightening
torque

1
1
to
1
5

kg
m

8
0

to
10
8
ft
lb

Notes

a
Assemble
oil

pump
and
drive

spin

die
aligning
driving

spindle
face

with
oil

pump
hole

b
Install
oil

pump
together
with

drive

spindle
so
that
the

projection
on
its

top
is
located
at
the
II
25
a
m

position
At
this

point
the
smaller

bow
shape
will
be

facing
toward
the

front

c
Do
not

forget
to
install

gas
et
Engine
Mechanical

I

Fig
EM

I04

11l6lalling
oil

pump

24
Install
fuel

pump
water
inlet

elbow
and
front

engine
slinger
in

their

positions

Fuel

pump
tightening
torque

1
2

to
1
8

kg
m

8
7

to
13

0
ft
lb

Note
Do
not

forget
to
install
fuel

pump
spacer
and

packing
between

spacer
and
block

spacer
and

fuel

pump

25
Install
oil
strainer
oil

pan
gasket

and
oil

pan

27

Install
rocker
cover
to

cylinder

head

Note
Make

sure
that
one
of
the

rocker
cover
bolts
is

longer
than
the

others
It
secures
F
I
C
D
assist

bracket

28
Install
air

pump
bracket
and

cooler

compressor
to

cylinder
block

EM
25
Tightening
torque

Oil
strainer

bolts

0

8
to
I
l

kg
m
5

8
to
8
0
ft

lb

Oil

pan
bolts

0
6
to
0
9

kg
m
4
3

to
6
5
ft

lb

Notes

a

Apply
sealant
to
the

step
portions

at

four

mating
surfaces

as
shown

in

Figure
EM
80

b

Oil

pan
should
be

tigh
tened
in

criss
cross

pattern
to
a
final

torque

of
0
6
to
0

9

kg
m
4
3
to
6
5
ft
lb

26

Adjust
valve
clearance
to
the

specified
dimensions

Special
tool

Pivot

Adj
iier
STl064000l

Tightening
torque

5

0
to
6
0

kg
m

36
to
43
ft
lb

Fig
EM
I05

Adjusting
valve
clearance

b
After

engine
has
been
assembled

run
it
for
at
least
several
minutes

and

finally
adjust
clearance
to
the

warm

specifications

29

Install
intake
manifold
to

ex

haust
manifold
The
intake
manifold

face
which
comes
into
contact
with

gasket
should
be
even
with
that
of

exhaust
manifold
Note
that
two
dif

ferent

sizes
of

attaching
bolts
are
used

Tightening
torque

2
5

kg
m

18
0
ft

lb

30
Install
heatshieid

plate
on
mani

fold
assembly

31
Install
air

gallery
pipe
on
ex

haust
manifold

32
Install
manifold

gasket
and

manifold

assembly
on

cylinder
head

Tightening
torque

1
2to
1

6kg
m

8
7
to
11
6
ft
lb

33

Install
blow

by
gas

pipe
on

cyl

inder

block
and
tighten
with
rear

engine
slinger

34
Install
thermostat
housing

gas

ket
thermostat

housing
and

thermo

stat

35
Install
thermal
vacuum
valve
on

thermostat

housing
Before

installing

apply
a

liquid
packing
slightly
to
the

threads

36

Install
FJ

C
D
bracket
on

cylin

der

head

37

Install
E
G
R

passage
and

E
G
R
valve
on
intake
manifold

38
Connect
E

G
R
tube
to
E

G
R

tube
and

exhaust
manifold

39
Install
check
valve

on
air

gallery

pipe

40
Install
air
cleaner
bracket
on

intake
manifold

41
Install
air
control
valve
on
air

cleaner
bracket
California
models

42
Install
vacuum
and
fuel
tubes

combined
on

cylinder
head

43
Install
distributor

assembly

44
Install

heatshield
plate

joint

seat

and
carburetor

Carbure10r
tightening

torque

0
5

to
1

0

kg
m
3

6
to
7
2

ft
lb

Note
When

instalUng
joint
seat
be

sure
to

put
the
duct
into

primary

hole
in

intake
manifold

S

J

Heatshield

plate
4
Joint

seat

2

Primary
hole
5

Secondary
hole

3
Duct

EM534

Fig
EM
I06

Installing
carburetor

joint
seat
Engine
Mechanical

45
Install
dash

pot
bracket
and

dash

pot
to
intake

manifold

46
Connect
all
air

vacuum
and
fuel

hoses

and
then

secure
with

clamps

I
Cylinder
block
to

P
C
V
valve

hose

2
A
B

valve
to
E

G
R

passage
vac

uum
hose

3
A
B

valve
to
E
G

R

passage
air

hose

4
Vacuum
tube
to
carburetor
vac

uum
hoses

5
Fuel
ube

to
carburetor
fuel

hose

6
Fuel
tube
to
fuel

pump
fuelhose

7
Distributor
to
vacuum
switch
or

spark
delay
valve
vacuum
hose

8
Air
control
valve
vacuum
hose

9
Check
valve

to
air

control
valve

hose

10
Thermal
vacuum
valve
to

E
G
R
valve
vacuum
hose

I
I
Thermal
vacuum
valve
to

vacuum
tube
hose

47
Install
carburetor
air

cleaner
on

carburetor
and
then
connect
air

and

vacuum
hoses

as
follows

I

Air
cleaner
to

exhaust
manifold

hot

air
duct

2

Air
c1eaner
to
air

pump
hose

3

Air
cleaner
to
rocker

cover
hose

4

Air
cleaner

to
air
control
valve

hose

5

6

48
Install

spark
plugs
in

place

49
Connect
all
distributor

high
ten

sion

cables
to

spark
plugs

50
Install
air

pump
drive
belt
cool

er

compressor
and
idler

pulley

51

Install
left

engine
mounting

bracket

52
Install
clutch

assembly
on

flywheel
with
Clutch

Aligning
Bar

KV30100200
Air

cleaner
to
A
B

valve

hose

Other
vacuum
hoses

Tightening
torque

1
2
to
2
2

kg
m

8

7
to
15
9

ft
lb

EM
26
I

I

KV30100200

EM440

Fig
EM
I07
In

talling
clutch
embly

53

Using
an
overhead
hoist
and

lifting
cable
hoist

engine
away
from

engine
stand
and

then
down
onto

engine
carrier

54
Install

right
engine
mounting

bracket
oil
filter
oil

pressure
switch

oil

level

gauge
and
water

drain

plug

When

installing
oil

filter
fasten
it
to

cylinder
block

by
hand

Note
Do
not

overtighten

flit
or
oil

leakage
may
occur

55
Install
alternator
bracket

adjust

ing
bar
alternator

cooling
fan

and

belt

56

Adjust
the
deflection
of
drive

belts
when

thumb

pressure
is

applied

midway
between

pulleys
A

pressed

force
is
above
10

kg
22
0
lb

Deflection

of
drive
belts

8
to
12
mm

0
315

to
0
472
in

EM613

Fig
EM
lOB
Fan
belt
tension

57
Fill

engine
oil

up
to

specified

level

Engine
Mechanical

g
Piston

ring

Ring
height

Top
and

second

Side
clearance

Top

Second

Ring
gap

Top

Second

Oil
mm
in

mrn
in

mm
in

h
Cylinder
block

Cylinder
bore
inner
diameter
mm
in

Wear
limit
of
dittoed
inner

diameter

Cylinder
bore

taper
and
out
of
round

Difference
in

cylind
bore

Surface
flatness
mm
in

mm
in

mm
in

mm
in

i

Cylinder
head

Surface
flatness

mm
in

TIGHTENING
TORQUE

Cylinder
head

bolts

kg
m
fl
lb

Connecting
rod

big
end

nuts
kg
m
ft
Ib

Flywheel
fixing
bolts

kg
m
ft
Ib

Main

bearing
cap
bolts

kg
m
ft
lb

Camshaft
bracket
bolts

kg
m
ft
lb

Camshaft

sprocket
bolt

kg
m
ft
lb

Oil

pan
bolts

kg
m

ft
1b

Oil

pump
bolts

kg
m
ft
lb

Oil
strainer

bolts
kg
m

ft
lb

Oil

pan
drain

plug
kg
m
ft
lb

Rocker

pivot
lock
nuts

kg
m

ft
Ib

Camshaft

locating
plate
bolts

kg
m
ft
lb

Carburetor
nuts

kg
m

ft
lb

Manifold
bolts

kg
m
ft
lb

Fuel

pump
nuts

kg
m

ft
lb

Crank

pulley
bolt

kg
m
ft
lb

Water

pump
bolts

kg
m
ft
Ib

Front
cover
bolts

kg
m
ft

lb

EM

30
1
977
to
1
990
0

0778
to

0
0783

0
040
to
0
073
0
0016
to

0
0029

0

030
to
0

070
0
0012
to
0

0028

0
25
to

0
40
0
0098
to
0

0157

0

30
to
0

50
0
0118
to

0
0197

0
30
to
0

90
0

0118
to
0
0354

85
000
to
85
050

3
3465

to
3
3484

0
2

0
0079

om
5
0

0006

0
05
0
0020

less
than
0

05
0

0020

less
than
0
05

0
0020

6
5
to
8
5

47
to
61

4
5
to
5
5

33
to
40

14

to
16

101
to
116

4
5
to

5
5
33
to
40

1

8
to
2

0

13
to
15

12
to

16
87
to
116

0
6

to
0
9
4
3
to
6
5

I
J
to
1
5

8
0
to

10
8

0
8
to
1
1
5
8
to
8
0

2
0

to
3
0

14
to
22

5
0
to

6
0

36
to
43

0
6

to
0
9

4
3
to
6
5

0
5
to
1

0
3
6

to
7
2

1
2
to
1
6
8
7

to
11

6

1
2
to
1
8
8
7
to
13

0

12
to

16
87
to
116

0
4
to

0
5
2
9

to
3
6

8
mm
0
315
in

dia

6
mm
0

236
in
dia
1

0
to
1
3
7
2
to

9
4

0
4
to
0
6
2

9
to
4
3

Engine
Mechanical

TROUBLE
DIAGNOSES
AND

CORRECTIONS

Condition

I

Noisy
engine

Knocking
of
crankshaft

and
bearing

Knocking
of

piston

and

connecting
rod

Camshaft

knocking

Timing
chain
noise

Camshaft
and
valve

mechanism

knocking

Water

pump
knocking
Probable
cause

Loose
main

bearing

Seized
bearing

Bent
crankshaft

Uneven
wear

of

journal

Excessive
crankshaft
end

play

Loose
bearing

Seized

bearing

Loose

piston
pin

Loose

piston
in

cylinder

Broken

piston
ring

Improper
connecting
rod

alignment

Loose

bearing

Excessive
axial

play

Rough
gear
teeth

Broken
eam

gear

Improper
chain
tension

Worn
and
or

damaged
chain

Worn

sprocket

Worn
and
or

broken
tension

adjusting

mechanism

Excessive
camshaft
and

bearing
clearance

Improper
valve
clearance

Worn

adjusting
screw

Worn
rocker
face

Loose
valve
stem

i1
1
guide

Weakened
valve

spring

Seized
valve

Improper
shaft
end

play

Broken

impeller

II
Other
mechanical
troubles

Stuck
valve

Improper
valve
clearance

Insufficient
clearance
between
valve
stem

and

guide

Weakened
or

broken
valve

spring

Biting
or

damage
of
valve
stem

Poor

Quality
of
fuel

EM
31
Corrective
action

Replace

Replace

Repair
or

replace

Correct

Replace
cen
ter

bearing

Replace

Replace

Replace
pin
or

bushing

Recondition

cylinder

Replace

Realign

Replace

Replace
bearing
thrust

plate

Repair

Replace

Adjust

Replace

Replace

Replace

Replace

Adjust

Replace

Replace

Replace
guide

Replace

Repair
or

replace

Replace

Replace

Adjust

Clean
stem
or
ream
guide

Replace

Replace
or
clean

Use
ood
fuel

DATSUN
PICK
UP

MODEL
620
SERIES

l
NISSAN

I

NISSAN
MOTOR
CO
LTD

TOKYO
JAPAN
SECTION
EF

ENGINE

FUEL

AUTOMATIC
TEMPERATURE

CONTROL
A
T
C
l

AIR
CLEANER

IDLE
COMPENSATOR

FUEL
FILTER

MECHANICAL
FUEL
PUMP

ELECTRIC
FUEL
PUMP

CARBURETOR
H
2

H
7

H

8

H

9

H

ll

H
14

Engine
Fuel

AUTOMATIC

TEMPERATURE
CONTROL
A
T

C

AIR

CLEANER

DESCRIPTION

OPERATION

A
T
C

AIR
CLEANER

HOT
AIR

OPERATION

A
T
C
AIR
CLEANER
COLD
AIR

OPERATION

A
T
C
AIR
CLEANER
COLD
AND

HOT

AIR
OPERATION

TEMPERATURE
SENSOR

DESCRIPTION

The
air

cleaner
removes
dust
and

dirt
from
the

air
before

it
enters
the

carburetor
and

engine
It
also

muffles

noise

resulting
from
the
intake

of
air

into
the

engine

The
air

cleaner

especially
designed

for

improved
exhaust
emission

control

is
referred
to

as
Automatic

Tempera

ture
Control

Air
Cleaner
In
order
to

reduce
HC
emission

when
the

under

hood

temperature
is

below
300C

860F
the

automatic

temperature

control

system
maintains
the

tempera

ture
of
air
to

be
sucked
in
the

carbure

tor
at
30

to
540C
86
to
1290F

thereby
enabling
lean

setting
for

carburetor

calibration
n

addition
to

this
the

automatic

temperature
con

twl

system
is

effective
to

improve

warm

up
characteristics
of
the

engine
CONTENTS

EF
2

EF
3
VACUUM

MOTOR
AND
AIR

CONTROL

VALVE

REMOVAL
AND

INSTALLATION

TEMPERATURE

SENSOR

VACUUM

MOTOR

FRESH

AIR

DUCT

AIR

CLEANER

INSPECTION

1
AIR

CLEANER
ELEMENT

2

HOT
AIR

CONTROL

SYSTEM
EF
3

EF
4

EF
4

EF
5

and
to

remove

carburetor

icing

The

A
T
C
air

cleaner

system
con

sists

of
the

following
devices

1
Air
cleaner

element

The
air

cleaner

element

employed
is

a

viscous

paper
type
It

requires
only

periodical
replacment
and
should
not

be

cleaned

2

Automatic

temperature
control

air

cleaner

In
the
A

T
C
air

cleaner
the
air

control
valve
is
actuated

by
intake

manifold

vacuum
to
control

the
intake

air
flow

circuit
The

temperature
sen

sor
detects
the

temperature
inside
the

air

cleaner
and

opens
or
closes
the

vacuum

passage

3

Hot
air
duct

The
hot
air
duct
is

mounted
on
the

exhaust
manifold
The
air
warmed

up

EF
2
EF
5

EF

5

EF

5

EF

5

EF
5

EF
6

EF
6

EF

6

EF

6

between
the

exhaust
manifold
and
hot

air
duct

is
led
to
the
air
cleaner

through
the

hose

4
Blow

by

gas
filter

The
blow

by

gas
nIter
removes
dirt

and
oil
from
the

blow

by
gas
sucked

in

the
air
cleaner
from
the

engine
rocker

cover

5

Fresh
air

duct

Except
for

Canada

The
fresh
air

duct
leads
the

outside

fresh
air

directly
to

the
air
cleaner

6
Idle

compensator

See

paragraph
Idle

Compensator

Page
EF
7

7

Altitude

compensator
California

models

See

paragraph
Altitude

Compensa

tor

Page
EF
20

Engine
Fuel

@

1

Fresh
air
duct

Except
for
Canada

2

Air
inlet

pipe

3
Vacuum
motor

assembly

4
Air
control
valve

5
Hot
air

pipe

6
Idle

compensator

7
Blow

by

gas
fiI
teT

8

Temperature
sensor
assembly

9
Altitude

compensator

California
models

EF713

Fig
EF
1
Automatic

temperature
control
air
cleaner

OPERATION

The
automatic

temperature
control

system
of
the
air

cleaner
is

controlled

by
the

inlet
air

temperature
and
the
load
condition
of
the

engine
The
inlet

air

temperature
is
detected

by
the

sensor
and
the
vacuum
motor
is
actu
ated

by
the

engine
intake
vacuum

Under
hood
air
Sensor
vacuum
at
Air

control
valve

Sensor

operation

temperature
vacuum
motor
side

operation

Below
60

mmHg

Open
cold
air

Below
300C
2
36

inHg

860

F
Close

Above
210
mmHg

Close
hot
air

8
27

inHg

30

to

540C
Half

open

Open

86
to
1290

F
cold
air
hot
air

Above
55
oC

Open
cold
air

Open

1310F

A
T
C
AIR
CLEANER
HOT

AIR

OPERATION

When
the
under
hood

air

tempera

ture
is
low
the

sensor
air
bleed
valve

remains
in
the

closed

position
and

establishes
vacuum

passage
between
the
intake

manifold
and

vacuum

motor
With
this
condition
the
vacu

urn

at
the
intake
manifold
side
actu

ates
the
air

control
valve
attached
to
the

vacuum
motor

diaphragm
to
intro

duce
hot
air
into
the
air
cleaner

through
the
hot
air

duct
on
the

ex

haust
manifold

EF
3

Underhood
air

I

@
Dr

Underhood
air

I
Engine
Fuel

f
f
l

l

ID
s

6

Cif

Ittl
ID
Air
inlet

pipe

Air
con
trol
valve

Hot
air

pipe

Diaphragm

Vacuum
hose

Diaphragm
spring

Air
bleed
valve

closed

Temperature
sensor

assembly
Holair

EF114

Fig
EF
2
Hota
r

delivery
mode

During
cold

engine
operation

7

To
manifold
Small

vacuum

1
Air
inlet

pipe

2
Air
con
trol

valw

3
Hot
air

pipe

4

Diaphnp

S
V
leuum
hoses

6

Diaphragm
prinl

7
Air

bleed
valve

closed

II

Temperature
senSOr

assembly

EF20S

Fig
EF
3
Cold
air

delivery
mode

During
cold

engine
operation

f
1

J
liP

omanifold
2

@
Air
inlet

pipe

Air

control
valve

Hot
air

pipe

Diaphragm

Vacuum
hoses

Diaphragm
spring

Air
bleed
valve

fully
open

8

Temperature
sensor

assembly

EF715

Fig
EF
4
Cold
air

delivery
mode

During
hot

engine
operation

ID

@
f

fjr

R
lfl
ow

2

underh
r
5

rv

Itti
ID

Hot
air
Air
inlet

pipe

Air
control
valve

Hot
air

pipe

Diaphragm

Vacuum
hose

Diaphragm
spring

Air
bleed
valve

partially
opened

8

Temperature
sensor

assembly

EF716

Fig
EF
5

Regulating
air

delivery
mode

EF
4
A
T
C
AIR
CLEANER

COLD
AIR
OPERATION

I

When
under
hood
air

temperature

is
low

The
sensor
air
bleed

valve
remains

in

the
closed

position
and
vacuum

passage
is

established
between
the
in

take
manifold
and

the
vacuum
motor

and
the
intake
manifold

vacuum
is

applied
to
the

vacuum
motor
dia

phragm
When
the

vacuum
is

small
or

when
the

engine
is

operating
under

eavy

1004
the
air

control
valve

opens

widely

irrespective
of
the

temperature

around
the

sensor
to
introduce
the

under
hood
air

cold
air

for
increased

power
of
the

engine

2

When
under

hood
air

temperature

is

high

The

sensor
air

bleed
valve

opens

fully
to
shut
off

the
vacuum

passage

between

the
intake
manifold
and
the

vacuum
motor
Due
to
the
force
of
the

vacuum
motor

diaphragm
spring
the

air

control
valve

closes
the
hot
air

pipe

of
the
air

cleaner
and

introduces
the

under

hood
air

cold
air

A
T
C
AIR
CLEANER

COLD

AND
HOT

AIR
OPERATION

When
the
sensor
air

bleed
valve
is

partially
opened
opening
of

the
air

control
valve
varies

with
the
vacuum

of
the

intake
manifold
With
the
air

control
valve
half
open

the
cold
air

and
hot
air
are
sucked

together
and

mixed
for

controlling
of
the
air

tem

perature
of
the
air

to
be
introduced
to

the
air

cleaner

TEMPERATURE
SENSOR

The

temperature
sensor
is

attached

to
the

inside
of
the
air

cleaner
The

bimetal
built
in

the
sensor
detects
the

under

hood
air

temperature
and

opens

or

closes
the
vacuum

passage
in
the

sensor

The
construction
of
the

tempera

ture
sensor
is
shown
in

the

following

CD
V
00
@

I

I

@
j
I

I

1
Protector
cover

Screw

Adjusting
frame

Air

temperature
bi

metal

Rivet

Valve
seat
frame

Lower
frame

Air
bleed
valve

Gasket

Fig
EF

6

Temperature
senior
EF206

VACUUM
MOTOR
AND

AIR
CONTROL
VALVE

The
vacuum

pressure
which
varies

with

opening
of
the
carburetor
throt

tle
acts

upon
the
vacuum
motor

dia

phragm
The
valve

shaft
attached
to

the

diaphragm
is
then
moved

up
or

down
in

response
to
the
vacuum
on

the

diaphragm
This
movement
of

the

valve
shaft

actuates
the
air
control

valve
to

control
the

temperature
of
the

air
to

be
introduced
into

the
air

cleaner

pr
to

I

1
Valve

spring

00
2

Diaphragm

@
3
Retainer

E
F

207
4
Valve
shaft

Fig
EF
7
Vacuum
motor

REMOVAL
AND

INSTALLATION

TEMPERATURE
SENSOR

Removal

Using

pliers
flatten

clip
con
Engine
Fuel

neeting
vacuum
hose
to
sensor
vacuum

tube

I

Pipe

2
Calch

3
Fixed
with

adhesive

4
Hose

5

Tab

6

Clip

7
Gasket

EC019

Fig
EF
B
Removal

of
semor

2

Disconnect
hose
from

sensor

3

Take
off

clip
from
sensor
vacuum

tube
and
dismount
sensor

body
from

air
cleaner

Note
The

gasket
between

sensor
and

air
cleaner
is
bonded
to
the
air

cleaner
side
and
should
not
be

removed

Inatallatlon

Mount
sensor
on
the

specified

position

For

mounting
position
of
sensor

see
the

following

EF717

Fig
EF
9

lalling
se
or
2
Insert

clip
into
vacuum
tube

of

sensor
After

installing
each
vacuum

hose
secure
hose
with
the

clip

Note
Be
sure
to
install
vacuum
hose

correctly
Correct

position
is
R

H

side
to
Nissan
mark
at
the

top

face
of

sensor
for
intake
manifold

L
H
side
for
vacuum
motor

VACUUM
MOTOR

1

Remove
screws

securing
vacuum

motor
to
air
cleaner

2
Disconnect
valve
shaft
attached

to

vacuum
motor

diapluagm
from
air

control
valve

and
remove
cacuum

motor

assembly
from
air

cleaner

3
To
install
reverse
the
removal

procedure

FRESH
AIR
DUCT

I
Disconnect
fresh
air
duct
at
air

cleaner

2

Fresh
air

duct
is

provided
with

projections
on
its
air
inlet
side
end

Hold
fresh
air
duct
with
a
hand
and

carefully

pull
out
from
radiator
core

support
while

turning
it
in
either

direction

3
To

install
reverse
the
removal

procedure
Be
sure
to

insert

projec

lions
of
fresh
air
duct

securely
into

mounting
hole
in

radiator
core

sup

port

EF518

EF
5
Fresh
air
duct

Air
cleaner

Duct

mounting
hole

Radiator

Radiator
core

support

Fig
EF

I0
Removal

of
fresh
air
duct