1979 DATSUN 210 gas type

Erigine
crankcase

EI
gine
cooling
system

Transmission
case

Final
drive
case

housing

Steering
gear
box

Fuel
tank

Air

conditioning
system

Refrigerant

Compressor
oil

f
tl

It
J

4
i

1

protect
the

catalytic

cop
verter
froitr

contamination
t
n
General
Information

APPROXIMATE
REFILL
CAPACITIES

Without
oil
filter
AI4

Al5

w

Al5

M
T

AfT

MiL

A
T
Liter

US
measure

3
2
3

qt

2
8
3

qt

3

7

llLgt

33
3

qt

5
2
5

qt

5
0
5Y

qt

5
9
6
Y
at

57

6qt

1
3
2
Y

ot

1
2
2

pt

53
5

qt

0
9
1

pt

0
25

pt

50
13
Y
I

0
8
tol

Okg
1

8
to
2
2
1b

0
237

8
0
floz
Withoil

Without
heater

With

heatfr

MaDllal
soeed

5

spee

Automatic
1

1
Includes
2
7

liters
2

US

qt
2

Imp
qt
for

torque
converter

RECOMMENDED
FUEL

Use
an
unleaded
or
low
lead

gaso

line
with
a
minimum
octane

rating
of

91

RON
Research
Octane
Number
For

cars

equipp
d
with
the

Cataly

tic

converter
California
and
FU
mod

els
use

only
unleaded

gasoline
to

RECOMMENDED

Lubricant

GasOline
engine
oil

Gear
oil
Transmission

and

steering

Differential

Au
omatic

TIM
fluid

Multi

purpose
grease

Brake
and
clutch
fluid

Anti
freeze
L
NDED

LUBRICAN

COMMENDED

i

I
VISCOSITY
NUMBER

t1

NGON
0

L
J

I
j
H

I

IlL
I

t

l

I
lc
30
ItM
7

l
t

U

I
ItM
I

L
L
tJ

30

I

I
fu

JIl
inld

do

o

II

L
liOwl

1
I
I
1

10

I
I

I
I
t

I

I

j
r

I

I
J
1

21
l
1
I
71

c

DIUt
I2lItMOl
UGIIII
FI

R

NIl
I
01
a
Specifications
Remarks

APISE

API
GL4
Further
details
refer
to

recommended
SAE

viscosity
chart

API
GL
5

Type
DEXRON

NLGI
No
2
Lithium

soap
base

DOT
US
FMVSS
No
116

Ethylene
glycol
base

GI
5
Imp

meas4re

2

qt

2

qt

3Y

qt

2

it

4

qt

4

q

5Y

qt

5

qt

2Y

pt

2

pt

4

qt

I

pt

pt

II

gal

1
8
to
2
2
lb

83f1
oz

Ji

j

j

f

EMISSION
CONTROL
DEVICES

En
ine
model
I
AI4
I
A1S

B310
Non
CaliCor

Non
California
models
Califor
nia

Car
model
California
models
E
cept
for
C
nada
Canada
nia
modeb

models
Except

for

Canada

M
T
M
T
A
T

Ti
ansmiuion
M
T
A
T
Except
A
T
FU
M
T
A
T
Station
Wagon

FU
models
models
models

AIR
CLEAN
I
A
T
C
air
cleaner
I
X
I
X
X
I
X
I
X
I
X
I
X
I
X
X

ER
Idle
compensator
Dual
type
X
I
X
X
I
X
I
X
I
X
I
X
I
X
X

Fresh
air
duct
X
I
X
X
I
X
I
X
I
I
I
X
X

ENGINE
I
Early
fuel
evaporative
system
X
I
X
X
xl
X
I
X
I
X
I
X
X

BASE
Exhaust
gas
type

CARBV
I
P
T
C
auto
choke
X
I
X
X
X
I
X
I
X
I
X
I
X
X
m

RETOR
I
l

Thr
ttle
opener
X
X
X
X
I
I
X
I
X
I
X
X
Q

I
Fuel
shut
off
system
I
X
I
I
I
3

m
ll

i
Dash
po
t
X
X
X
X
I
X
I
X
I
X
I
X
X

N
l

IGNITION
I
H
I
C
ignitor
X
X
X
X
I
X
I
X
I
X
I
X
X
c

SYSTEM
Spark
timing
contra
system
T
e
S
X
X
X
I
I
I
I
l

X
X
I
X
ll

Thermal
vacuum
valve
X
X
X
I
X
I
I
I
I
X
X
c

Vacuum
delay
valve
X
I
X
I
I
I
X
I
0

X

A
I
S
I
Air
pump
Air
pump
air
cleaner
check
valve
I
X
X
I
X
I
X
I
I
I
I
x
X

A
B
valve

Combined
air
control
C
A
C
valve
I
X
X
I
I
I
I
I
I
X

Relief
valve
I
I
X
I
X
I
I
I
I
X

Air
induction
valve
Filter
A
B
valve
I
I
I
I
X
I
X
I
X

E
G
R
I
Exhaust
gas
recirculation
E
G
R
valve
I
X
I
X
I
X
I
X
I
X
I
X
I
X
I
X
X

SYSTEM
Thetmalvacuum
valve
I
X
I
X
I
X
I
X
I
X
I
X
I
X
I
X
X

Back
pressure
transducer
B
P
T
valve
I
X
I
X
I
X
I
X
I
X
I
I
I
X
X

CATALYZER
I
CatalytJc
converter
I
X
I
X
I
I
I
X
I
I
I
X

Newly
equipped
unit
on
1979
models
M
T
Manual
transmission

Remarks
X
Available
A
T
Automatic
transmission

Not
available
A
T
C
Aute
matic
tempeJ
ature
control

P
T
C
POlitive
temperature
coefficient

A
I
S
Air
injection
system
or
Air
induction
system

A
B
valve
Anti
backfire
valve

Engine
Tune

up

BASIC
MECHANICAL
SYSTEM

ADJUSTING
INTAKE

AND
EXHAUST

VAL
fE
CLEARANCE

Note
After

tightening
cYlinder
head

bolts

adjust
intake
and
exhaust

valve

clearances

Valve
clearance
ai
ljustment
cannot

be

made
while
the

engine
is
in

opera

tion

To

adjust
proceed
as
follows

I
Start

engine
and

warm
it

up
uritil

water

temperature
indicator

points
to

the
middle
of

gauge
Then

stop
engine

2
Rotate

crankshaft
to

bring
No
I

cylinder
in

top
dead
center
on
its

compression
stroke

3
Remove

valve
rocker

cover

Adjust
valve
clearance
at

following

four

points
while

engine
is
still
hot

CD
Exhaust
valve

of
No
I

cylinder

@
Intake
valve
of
No
I

cylinder

@
Intake
valve
of
No
2

cylinder

@
Exhaust

valve
of
No
3

cylinder

Note

Numbers
in

circle

agree
with

those
in

accompanying
sketch

tiri

Fig
ET
1

Adjusting
Value
Clearanu

4

Again
rotate
crankshaft
one
turn

so
that

No
4

piston
is
in

top
dead

center
on
its

ompression
stroke
Ad

just
following
valve

s

CID
Exhaust

valve
of
No
2

cylinder

@
Intake
valve
of
No
3

cylinder

j
Intake
valve
of
No
4

cylinder

@
Exhaust
valve
of
No
4

cylinder

Adjustment
should
be
made
while

engine
is
hot
After
all
valves
have
been

adjusted
correctly
tighten
lock

nut

firmly
to
secure
ihe

adjustment

Valve
clearance

Hot

Intake

0
35

mm
0
014

inl

Exhaust
0
35
mm

0
014

in

tJl
Tightening
torque

Valve

rocker

adjusting
nut

1
6

to
2
2

kltm

12

to
16
ft
lb

Alternator

Crankshaft

pulley

Unit
mm

in

Idler

pulley

Fig
ET
2

CHANGING
ENGINE

OIL

1

Check
if
oil
is
diluted
with
water

or

gasoline
Drain
and
refill
oil
if

necessary

Note

a
A

milky
oil
iiulicates
the

presence

of

cooling
water
Isolate
the
cause

and
take
corrective
measure

b
An
oil

with

extremely
low

viscosity

indicates
dilution
with

gasoline

2
Check

oil
level
If
below
the

specified
level
raise
it

up
to
the
H

level

3

Change
engine
oil
in

accordance

with
the
maintenance

schedule

Engine
oil

capacity

A14

With
oil
filter

3
7
liters

3
U
US

qt
3
Yo

Imp
qtl

ET3
CHECKING
AND

ADJUSTING
DRIVE

BELTS

I

Check
for

cracks
or

damage
Re

place
if

necessary

2

Normal
drive

belt
deflection
is

showndI
figure
below
when

moderate

thumb

pressure
is

applied
midway

between

pulleys

Thumb

pressure
10

kg
221bl

Idler

pulley

Compressor
p1
111ey

AC710

Checking
Drive
Belts

for
Deflection

Without
oil
filter

3
2
liters

3

USqt
2

U

ImP
ltl

A15

With
oil
filter

3
3
liters

3
US

qt
2
U

Imp
qd

Without
oil
filter

2
8
liters

3
us

qt
2

Imp
qd

REPLACING
OIL

FILTER

The
oil
filter
is
a

cartridge
type
and

can
be

removed

using
Oil
Filter

Wrench
STl9320000

I
Check
for

oil
leaks

past
gasketed

Oange
If

leakage
is

found
retighten

just
enough
to

stop
leakage
If
reo

tightening
is

no

longer
effective
re

PRECAUTION

Before

assembling

engine
observe

following
precautions

I
Clean

all

disass
mbled

parts
with

clean
solvent
All
611
holes
in
crank

shaft

camshaft
valve

rocker
shaft
etc

should

be

thoroughly
cleaned
to
re

move
all

traces
of

grinding
chips
or

lint

Always
use
clean
solvent

2
In

general
used

gaskets
packings

and
oil

seals
should
be

replaced

3

Under
no
circumstances

should

lockwashers

be
reuse
d

4

Place
bolts

nuts
and
woshers

back
in

their

original
parts
or
from

which

they
were
removed

5
MOst

packing
Serve
best
when

liquid

packing
is

applied
to

sealing

surfaces
When

desigiiated
use
suitable

liquid
packing
to

eliminate

possibility

of
water
oil
and

gas
leak

6
Prior

to

assemQling
all

sliding

surfaces
should
be

lioerally
oiled

7

Proper

tightening
is
essential
to

successful

performanCe
of
all
car
re

pairs
It
is

also

important
to
follow

correct

tightenig
sequence
in

pulling

up
cylinder
head
Be

on
alert
at
all

times

to
amount
of

clearance

per

mitted

8
Cleanliness
of
tools
or

parts
such

as
work

bench
used
jn

making
a

repai

is
essential

When

setting
up
a

job

every
precaution
should
be
taken
that

tools
or

parts
are
free
of

dirt
mud
and

oil
Do

not
work

in
dust

and

grit
for

they
are

primary
cause
of
wear
in

any

engine

CYLINDER

HEAD

I

Install
valve

spring
seat
Install

valve
oil
seal

by
lightly

tapping
its

head
with

a

plastic
hammer

through

Valve

Lip
Seal
Drift
KVI0104800
Engine
Mechanical

ENGINE
ASSEMBLY

m

f

if
@

@

4

1
Valve

2

Lip
seal

3
Valve

guide

4
Valve

spring
seat
EM688

Fig
EM
52

tailing
Valve

Lip
Seal

2
Insert

valve
into

valve

guide

Note
Use
care
when

inserting
valve
so

as
not
to
scratch

lip
of
oil
seal

3
Install

valve

spring
and

valve

spring
retainer

Compress
valve

pring

with

Valve
Lifter
STl2070000
and
fit

valve
collets
in

place
Release
Valve

Lifter

slowly

EM462

Fig
EM

53

Inatalling
Valve

Note

8
Do

not

interchange
valves

between

cylinders
for
their

sliding
or

seating

surfaces
have

undergone

wearing
in

or
have

been

lapped
at

assembly

forming

specific
contact
with
mat

ing

parts

b
Check
to
be

sure
that
valves

are

properly
seated
on
valve
seats

with

out

foreign

particles
stuck

in
be

tween

c
Valve

spring
is
an

uneven

pitch

type
Install

spring
facing
Wte

painted
side
to

cylinder
head

sur

face

EM

12
p

lOted

l
rJF
t
A
J

il
j

j
Wide

pilCh
l

Nallow

pitch

I

EM489

Fig
EM
54
Valve

Spring

PISTON
AND

CONNECTING

ROD

I

Assemble

pistons
piston

pins
and

connecting
rods

on
the

designated

cylinder

EM103

Fig
EM

55

Installing
Piston
Pin

EM157

Fig
EM

56

Arranging
Piaton
and

Connecting
Rod

Note

3

Piston
is

pressed
into

connecting

rod

Fitting
force
is

from
1
to

3

tons

and
aid
of
Piston

Pin
Press

Stand
KVI

01
05300
is

necessary

When

pressing
piston

pin
in

connec

ting
rod

apply
engine
oil
to

pin
and

small
end

of

connecti
8
rod

b

Arrange
so
oil

jet
hole
of

connect

ing
rod

big
end
is

directed

toward

right
side
of

cylinder
block

c

Be
Sure
to
install

piston
in

cylinders

with
notch
mark

of

piston
head

toward
front
of

engine

OIL

PUMP

The
oil

pump
and
filter

assembly
is

bolted
to

the

right
side

of
the

cylinder

block
and
can
be
removed

with
the

engine
in

pl
c
The
oil

pump
which
is

driven

by
a

gear
on
the
camshaft

has

the

full
flow

element

type
filter
in

stalled
to
the

oil

pump
cover

REMOVAL

I

Place
a
suitable
container

under

oil

pump

2
Remove
three

bolts

attaching
oil

pump
and
filter

assembly
and

with

draw

assembly

3

Separate
oil

filter
from
oil

pump

4

Ciean
off
old

gasket
from

mating

surfaces

i

E

L043

F
EL

2
R

moving
Oil

Pump

Asso

mbly

INSTALLATION

I

Install
oil
filter
to
oil

pump

2

Locate
oil

pump
and

filter
as

sembly
or

cylinder
block

using
a

spacer
and
new

gasket
Secure
with

three

bolts

l
l
Tightening

torque

Oil

pump
securing
bolts

0
9
to
1
4

kg
m

6
5
to
10
1
ft

lbl

3

Check
oil
level

and
add
oil
if

necessary

4

Start

engine
and

check
for
oil

leaks

5

Remove
the
container
Engine
Lubrication

System

DISASSEMBLY
AND

ASSEMBLY

I

Remove
bolt

securing

pump
cover

to

pump

body
Separate
pump
cover

from

pump
body

2

Slide
out
outer
rotor

from

pump

body

3

Remove
oil

pressure

regulator

plug
washer

shim

spring
and
valve

4

Assemble
oil

pump
in
reverse

order
of

disassembly

Note

a

When

placing
oil

pump
in

a
vice

use
extreme
care
not
to
distort

pump
body
and
cover
in
the

jaws

b
Do

not

pull
out

drive
shaft

pin

securing
drive
shaft

and
inner
rotor

Shaft
is

press
fitted
to
rotor
with

the

pin
caulked

EL044

Fig
EL
3
Oil

Pump

l
l
Tightening

torque

Oil

pump
cove
bolt

0
39

to
0

5
2

kltm

2
8

to
3
8

ti
Ib

Regulator
valve

plug

4
0
to
5
0

kltm

29
to
36
ft

bl
INSPECTION

Wash
all

parts
in

cleaning
solvent

and

dry
wiih

compressed
air

I

hispect
pump
body
and

cover

for
cracks
or
excessive
wear

2

Inspect
pump
rotors
for

excessive

wear

3
Check
inner

rotor
shaft
for

looseness
in

pump
body

4

Inspect
regulator
valve
for
wear

or

scoring

5
Check

regulator

spring
to

see
that

it
is

not
worn
on
its

side
or

collapsed

6

Using
a
feeler
gauge
check

tip

clearance

00
and
outer
rotor
to

body

clearance

CD
shown
in

Fig
EL
4

EL059

1
Outer
rotor
to

body
clearance

2

Tip
clearance

3

Gap
between

rotor
and

stnight
edge

4

Gap
between

body
and

straight
edge

ig
EL
4

Checking
Rotor

Clea
nce

7

Place
a

straight
edge
across
the

face
of

pU
mp
and

depress
it

slightly
as

shown
in

Fig
EL
4

Check

gap

@

between

body
and

straight
edge
or

gap

@
between
rotor
and

straight
edge

Gap

0
03
to
0
06
mm

0
0012
to
0
0024
in

Rotor
side
clearance
rotor
to
bot

tom

cover
clearance
with

gasket

should

satisfy
the

specifications

Standard
Wear
limit

Rotor

side
clearance

mm
in
0

04
to
0
08

rotor
to
bottom

cover

0
0016
to
0
031
0
20
0

0079

Rotor

tip
clearance

V
mm
in
Less
than

0
20
0
0079

0
12
0
0047

Outer
rotor
to

body

mm
in
0

15
to
0
21

0
50
0
0197

clearance

CD
0
0059
to
0
083

EL3

Cooling
System

TEM
COUPLlNG

Non
Califomia

model

equipped
with
air

conditioning

Tem
coupling
is

a

type
of
fan

coupling
which
is

provided
with
a

temperature
control

system

The
conventional

coupling
always

slips
the
fan
at

a

high

speed
under
a

constant

ratio

regardless
of
the

engine

cooling

requirement

The

slipping
ratio
of
the
Tem

coupling
however
is

properly
changed

with
the

cooling
requirement

ON
denotes
that

cooling
is

required
and
the
fan

operates
up
to

about
2

900rpm
When

high
cooling
is

not

required
during
cold
season
with

the

engine
warmed

up
etc
the

oper

ation

is

placed
under
OFF
condition

and
the
fan

slips
at
about
2

050

rpm

The
coiled
bimetal
thermostat

installed
on
the
front
center

portion
of

the
Tem

coupling
detects

temperature

of
air

passing

through
the
radiator

The
air

temperature
is

directly

relative

to
the

engine
coolant

tempera

ture

and
the
inside
slide
valve

is

opened
or

closed
as

required
and
thus

the
ON
OFF
control
is

performed

When
the
air

temperature
rises

the

bimetal
is

expanded
and
the
valve
is

opened
silicone

oil
is
forwarded

to
the

groove
that

transmits

torque
and
the

system
is

placed
under
ON

con

dition

When

the
valve
closes
silicone
oil
is

not

supplied
to
the

groove
oil
in

the

groove
is
accumulated

on
the
Tem

coupling
periphery
due
to
the
centrifu
1
Bi
metal

thermostat

2

Slide
valve

3

Reserve
chamber

fOl
OFF

4

Bearing

5

Coupling
part
labyrinth

6
Driven

part

C0130

Fig
CO
5

Tem

coupling

gal
force
and
led
into

the
reserve

chamber
Now
oil
is
eliminated
from

the

groove
and
the

system
is

placed

under
OFF
condition

With
this

system
when
fan

cooling

is

not

required
the

output
loss

IS

miniinized
and
noise
can
be
far

reduced

Q

i
tionalCOUPling

WATER
PUMP

SPEED

Q

ON

OFF

Tem
coupling

WATER
PUMP

SPEED

C0029

Fig
CO

6
Characteristic

of

Tern

coupling

I

SPECTION

Check
Tem

coupling
for

oil

leakage

or
bend
of
bimetaL

If

the
above

symptoms
are
found

replace
it

with
a
new
one
as
an

assembly

CO
4
THERMOSTAT

REMOVAL
AND

INSTALLATION

I
Drain

cool
nt

partiaUy

2

Disconnect

upper
radiator

hose
at

water

outlet

3

Disconnect
air

hose
for

air

injec

tion

systein
at
check
valve

Fxcept

FU

models

4

Loosen
belt

for
air

injechon

system
by
loosening
idler

pulley
se

curing
nut

and

adjusting
bolt

Except

FU
models

CD
@
ID

I

2

3
C0053

Idler

pulley

Nut

Water
outlet

Fig
CO
7

Disconnecting
Air
Hose
and

Loosening
Belt

Except
FU
models

5
Loosen
bolts
and
remove
idler

pulley
bracket

Except
FU
models

6
Disconnect
air

induction

pipe

FU
models

7
Remove

bolts
and
remove
water

outlet

gasket
and
thermostat
from

thermostat

housing

I

Thermostat

2
Air
check
valve

Except
FU
models

3
Water
outlet

Fig
CO

Removing
Thennostat

8

After

checking
thermostat
rein

stall
with
a
new

housing
gasket
in

place

9
Reinstall
water
outlet

TEMPERATURE
SENSOR

Removal

I

Using
pliers
flatten

clip
con

necting
vacuum

hose
to

sensor
vacuum

tube

1

Pipe

2
Catch

3
Fixed
with

adhesive

4
Hose

5
Tab

6

Clip

7
Gasket

EC019

Fig
EF
7

Removing
Seruor

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

Installation

Mount
sensor
on
the

specified

position

2

Insert

clip
into

vacuum
tube
of

sensor
After

installing
each
vacuum

hose

secure
hose
with
the

clip

Note
Be

sure
to
install
vacUl
11n

hose

correctly
Correct

position
is
R
H

side
to

Ntisan

mark
at
the

top

face
of
sensor
for
intake
manifold

L

H
side
for

Deuum
motor

VACUUM

MOTOR

1

Remove

screws

securing
vacuum

motor

to
air
cleaner

2

Disconnect

valve
shaft

attached

to

vacuum
motor

diaphragm
from
air

control
valve

and

remove

vacuum

motor

assembly
from
air

cleaner

3
To
install

reverse
the

removal

procedures
Engine
Fuel

Fig
EF

8
Removing
Vacuum
Motor

INSPECTION

AIR

CLEANER
FILTER

Viscous

paper

type
air

cleaner
filter

does

o
ot

rt

quire
any
cleaning
opera

tion

until
it

is

replaced
periodically

Brushing
or

blasting
operation
will

cause

clogging
and
result

in
enrich

ment

of
carburetor
mixture

and

should
never
be

conducted
For
reo

placement
interval
of
air

cleaner
filter

refer
to

Maintenance

Schedule

AUTOMATIC

TEMPERATURE

CONTROL
SYSTEM

Engine
failures

resulting
from
a

malfunctioning
A
T
C

system
are

manifest

during
cold
weather

opera

tion
Such
failures

include

Engine
stall
or
hesitation

Increase
in
fuel

consumption

Lack
of

power

If
these

phenomena
should

occur

check

A
T
e

system
as

described
in

the

following
before

carrying
out

inspection
of

carburetor

I
Check
that

vacuum
hoses
are

se

l

urely
connected
in
correct

position

2

Check
each
hose

for
cracks
or

distortion

3

Check
A
T

C

system
for

proper

function
as

follo
ys
Confirm
that

engine
is

cold
before

starting
test

With

engine
topped
disconnect

fresh
air

duct
if
so

equipped

Place
a
mirror
at
the
end

of
air

cleaner
inlet

pipe
as
shown
and

check

to
see
if
air
control
valve

is
in
correct

position

EF
4
Fig
EF
9

Inspecting
Valve
Po

man

Air
control
valve
is

in
correct

posi

tion
if
its
cold
air
inlet

is

open
and

hot

air
inlet
is

closed

4
Start

engine
and

keep
idling

Immediately
after

engine

starting

check
air
control

valve
for

correct

position
as
described
above
In

this

case
correct

position
of
air
control

valve
is

the

reverse
of

step
3

under

hood
air
inlet
is
closed

and
hot
air

inlet
is

open

S

Check
that
air
control
valve

grad

ually
opens
to

cold
air

inlet
side

as

engine
warms

up
When

environmental

temperature
around

temperature
sen

sor
is
low

spend
more
time

for

engine

warming
up
operation
to
facilitate

smooth

operation
of
air
control

valve

If
the
above

test
reveals

any
prob

lem
in
the

opera
ion
of
air
control

valve

carry
out
the

following
test

VACUUM
MOTOR

I
With

engine
stopped
confirm

that

cold
air
inlet
is

open
and

hot
air

inlet
is

c1
Sed

If
not

check
air
control
valve
link

age
for

proper
operation

2

DiscoJln
ct
ac
um

motor
inlet

vacuum
hose

and
connect

another

hose
to
the

inlet
to

apply
vacuum
to

vacuum
motor

Vacuum
can

be

appli
d

by
breathing
in

tile
hos
e
end

as

shown
Then

confirm
that

the
air

control
valve

moves

3
With
hot
air
inlet
in

open
posi

tion
as

described
in

step
2

above

pinch
vacuum
hose
with

fingers
and

cut
off
air
from

vacuum
hose
In

this

condition

check
that
air
control

valve

maintains
the

condition
described
in

step
2

for
more
than

30
seconds

and

that
hot

air
inlet

is

open
If

diaphragm

spring
actuates

the
air
control
valve

by

DESCRIPTION

The

carburetors
are

of
downdraft

two

barrel

type

designed
to
increase

ppwe
r
a
fu
l
eC

l
Il
Y
t

3
ell
a

to

reduce

exhaust

gas
emissions

These
carburetors

present
several

distinct
features
of

importance
to

car

owner

A

summary
of

features
is
as
fol

lows

1

Secondary
throttle
valve
is

oper

ated

by
throttle
lever

High
power
and

good
acceleration
are

gained
with
com

bination
of
the

auxiliary
valve

2

Accelerating

pump
provide
ex

cellent
acceleration

3
Power
valve
mechanism
is

a
vacuo

urn
actuated

boost

type
and

improves

high
speed
driving

4

The
throttle

opener
control

sys

tem

Except
FU
model

incorporates
a

servo

diaphragm
which

helps
open
the

throttle
valve
at

a

decreasing
speed
so

as
to

reduce

hydrocarbon
emissions

to

a
minimum

5
An
anti
d

eseling
solenoid

valve
is

installed
to

prevent
dieseling
When

ignition
key
is

turned
off
the

fuel

passage
involved
in
the
ow

system
is

closed
and
the
fuel

supply
is
shut

down

completely

The
solenoid
valve
also

serves
as
an

actuator
of
the
fuel

shut
off

system
on

the

FU
model

6
In
the
choke
mechanism
an

elec

trie
automatic

choke
is
used

to
auto

maticaDy
control
chok
valve

opera

tion

during
engin
war

up

7

The
carburetor
comes

equipped

with
dash

pot
which
ensures
smooth

deceleration
without

engine
stall
under

aU

operating
conditions

STRUCTURE
AND

OPERATION

These
carburetors
consist
of
a

main

system
for
normal

running
a
slow

system
for

idling
and

an

accelerating

and

power
mechanisIll

Some

emission
control
devices

are

added
E
ngine
Fuel

CARBURETOR

I

J

1

Primary
main

jet

2
Idle

adjust
screw

3
hUe
nozzle

4

By
pass
hole

5

Primary
throttle
valve

6

Primary
slow

jet

7

ptug

8

Primary
5l

w
air
bleed

9

Primary
main
air
bleed
10

Primary
air
vent

pipe

11

Primuy
main

nozzle

12

Choke
valve

13

Primary
small

venturi

14

Secondary
small

venturi

15

Secondary
air
vent

pipe

16

Secondary
main

nozzle

17

Secondary
main
air
bleed

18

Secondary
slow

air
bleed

1
Oloke
valve

2

Primary
air
vent

pipe

3
Prima
y
main
nozzle

4

Primary
slow

jet
19

Plug

20

Secondary
slow

jet

21

Needte

22
Fuel
fLlter

23

Secondary
tIuottle

valve

24

Auxiliary
valve

25

Secondary
main

jet

Note
Do
not
remo
the

parts
inarbd

with
anuteriak

EF416A

Fig
EF
17
Carburetor

PRIMARY

SYSTEM

PrlinarJ
main

sJstam

The
fUel

flowing
out
of
the

passages

at
bottom
of

float
chamber

passes

through
the

primary
main

jet
and
is

mixed
with
air

coming
from
main
air

bleed
The

gas
mixture
is

pulled
out

into
the

venturi

through
the
main

nozzle

When

throttle
valve
is
wide

open

and

engine
require
dense
mixture

gas

power
valve

opens
and
fuel
also
flows

into
main

system

EF044A

Fig
EF
18

PtJrlially

Loading

EF
8