1979 DATSUN 210 oil filter

Emission
Control

System

CRANKCASE
EMISSION
CONTROL
SYSTEM

DESCRIPTION

This

system
returns
blow
by

gas
to

both
the

intake
manifold
and
carbure

tor
aitdeaner

The

positive
crankcase
ventilation

P

C
v
valve
is

provided
to

conduct

crankcase
blow

by
gas
to
the
intake

manifold

During
partial
throttle

operation
of

the

engine
the
intake
manifold
sucks

the
blow

by
gas
through
the
P

C
V

valve

Normally
the

capacity
of
the

valve

is

sufficient
to
handle

any
blow

by
and

a

small
amount
of

ventilating
air

L

J

J

o

I

Fresh

air

Blow

by
gas
The

ventilating
air
is

then
drawn

from

the
dust
side
of
the
carburetor

air

cleaner

through
the
tube
connect

ing
carburetor
air

cle
er
to
rocker

cover
into
the
crankcase

Under
full
throttle
condition
the

manifold
vacuum
is

insufficient
to

draw
the

blow
by
flow

through
the

valve
and
its

flow

goes

through
the

tube
connection
in
the

reverse
direc

tion

On
cars
with
an

excessively
high

blow
by
some
of
the
flow
will

go

through
the
tube
connection

to
car

buretor
air

cleaner
under
all
condi

tions

r

IiI
e
1

LJ

1

Seal

type
oil
level

gauge

2
DafOe

plate

3

Flame
arrester

4
Filter

5

P
C
V
valve

6
Steel
net

1
Baffle

plate

EC871

Fig
EC
5
Crankcase
Emis
ion
Control

Sy
tem

EC
6
INSPECTION

p
C
V
VALVE
AND
FILTER

With

ei
gine

runnirig
at
idle
remove

the
ventilator
hose
from
P

C
V

valve

if
the
valve
is

working
a
hissing
noise

wiD
be
heard

as
air

passes
through
the

valve
and
a

strong
vacuum
should
be

felt

irnniediately
when
a

fmger
is

placed
over
valve
inlet

EC139A

Fig
EC
6

Checking
PC

V
Vo
ve

VENTILATION

HOSE

I
Check
hoses

and
hose
connec

tions
for
ieaks

2
oisconn
ct
all
hoses
and

clean

with

compressed
air

If

any
hose

cannot
be

free
of

obstructions

replace

Ensure
that
flame

arrester
is

surly

inserted
in

hose
between

air
cleaner

and
rocker
rover

ET277

Fig
EC

7

Checking
Ventilation
Hose

REMOVAL

I

Disconnect

wiring
to
brake
fluid

level

gauge

2
Disconnect
front
and
rear
brake

tubes
from
master

cylinder

CAUTION

When

removing
brake
tubes

use

suitable
tube

wrench

Never
use

open
end
or

edjustllble

wrench

Note
When

disconnecting
brake

tubes

be
sure
to
use
a
container

to
receive

draining
brake
fluid

Use
of

raga
is
also

suggested
to

keep
adjacent
perts
and
area

clean

3
Remove

master

cylinder
securing

nut
Master

cylinder
can
then
be
taken

out

DISASSEMBLY

1
Remove
reservoir

caps
and

filtern

and

drain
out
brake
fluid

2

Pry
off

stopper
ring
using
a

screwdriver

3
Remove

stopper
screw
and
take

out

stopper

primary
piston
assembly

spring
and

secondary
piston
assembly

in

the
order

shown

Note

Discard

caps
if

they
are
reo

moved
from

piston
assemblies
and

use

new
ones

4

Unscrew

pluga
to

gain
access
to

check
valve
for

disassembling

Note

a

Never
detach
reservoir
tanks

If

they
are
removed
for

any
reason

discard
them
and
install
new

ones

b
Do

not
remove
or
disassemble

brake
fluid
level

gauge

INSPECTION

Thoroughly
clean
all

parts
in
a

suitable
solvent
and
check
them
for

wear
or

damage
Replace
any

part
that

is

faulty
Brake

System

CAUTION

Use
brake
fluid

to
clean
Never

use

mineral
oil

I
Check

cylinder
and

pistons
for

evidence
of
abnonnal

wear
or

damage

Replace
if
found

faulty

2
Check

piston
to
cylinder
clear

ance
If
it

exceeds
the

specified
value

replace
either

piston
or

cylinder

Piston
to

cylinder
clearance

less
than
0
15

mm
0

0059
in

3

Check

springs
for
weakness

fatigue
or

damage
Replace
if
neces

sary

4
When

master

cylinder
is
disas

sembled
be

sure
to
discard

caps
and

valves

Replace
any
other

parts
which

show
evidence
of

deformation
wear
or

other

damage

S

Replace
damaged
oil
reservoirs

and

caps

ASSEMBLY

Assemble
master

cylinder
following

the
reverse

procedure
of

disassembly

paying
particular
attention

to
the
fol

lowing
note

Note

a

Replace
gaskets
and

packing
with

new
ones

b

Apply
brake
fluid

or
rubber

grease

to

sliding
contact
surface
of

parts

to
facilitate

assembly
of
master

cylinder

c
The
brake
master

cylinder
is

avail

able
in

both
NABCO
make
and

TOKICO
make
There
is

no
inter

changeability
of

repair
kits
or
com

ponent
parts
between

NABCO
and

TOKlCO
makes

When

replacing
the

repair
kit
or

component
parts
ascertain
the

brand
of
the
brake

master

cylinder

body
Be
sure

to
use

parts
of
the

same

make
as
the

fonner
ones

INSTALLATION

Install

master

cylinder

following

the
reverse

procedure
of
removal

After

installation
bleed
brake

system

BR
5
CAUTION

When

installing

Flare
Nut

6694310000
brake
tubes

use

Torque
Wrench

CiJ

Tightening
torque

Brake
master

cylinder

securing

nut

0
8
to
t
1

kg
m

5
8
to
8
0
ft
lb

Brake
tube
flare
nut

1
5
to
1
8

kg
m

11
to
13
ft
b

BRAKE
FLUID

LEVEL
GAUGE

Inspection

I

Disengage
hand

brake
control

lever

2
Raise

cap
and

make
sure
that

hand

brake

warning
lamp

goes
on

when

float
comes
into
contact
with

stopper

BRAKE
LINE

REMOVAL

I
Remove
flare

nuts
on
both
ends

and

remove
retainers
and

clips

CAUTION

When

removing
brake
tubes
and

hoses
use
suitable
tube
wrench

Never
use

open
end
or

adjustable

wrench

2
To
remove
brake
hose

first
re

move
flare

nut

securing
brake
tube
to

brake
hose
and

withdraw
lock

spring

End
of
hose
can
then
be

removed
from

bracket
Next
remuve

brake
hose
Do

not
twist

brake
hose

INSPECTION

Check

brake
lines
tubes
and

hoses

for
evidence

of
cracks
deterioration
or

other

damage
Replace
any
faulty

parts

VACUUM
SYSTEM

MAGfilET
VALVE

The

magnet
valve
is

located
be

tween
the

fast
idle
actuator
and

the

intake
manifold
vacuum

con

nector

Valve

cloaed

When
current
to
the
coil
is
inter

rupted

passage
on
the
intake
mani

fold
side

closes

leaving
the

actuator

side

line

open
to
the

atmosphere

Actuator

side

j

I

i

r
1
Filter

2
Return

spring

3
Coil

AC175A
4

Valve

Intake
manifold
side

Fig
AG
6

Magnet
Valve

Glosed

Velve

open

While
the

magnet
valve
coil
is

energized
by
an
electric
current
it

holds
the
valve
needle
in
the

raised

position
and
vacuum
is

imposed
on

the

vacuum
actuator
from
the
intake

manifold
Air

Conditioning

Actuator
side

AC176A
Intake
manifold

side

Fig
AG
7

Magnet
Valve

Open

FAST
IDLE
CONTROL

DEVICE
F
I
C
D

FAST

IDLE
ACTUATOR

The
fast

idle
control
device
in

creases

engine
idle

speed
so
that
the
air

conditioner
continues
to
cool
the

pas

senger
compartment
even
when
the

car

is
at
a

standstill

The
device
is
a
vacuum
actuator

and
is

equipped
with
a

diaphragm
The

diaphragm
deflects
when
vacuum

pres

sure
is

applied
and
as
a
result
the

operating
wire
attached
to
it
is
moved

The

operating
wire
is
connected
with

the
carburetor
throttle
lever
When

the

vacuum

pressure
acting
on
the
dia

phragm
is
lost
the

diaphragm
is

reo

turned
to
its

original
position

AC
6
1

Adjusting
screw

2
Lock
nut

3

Diaphragm

AC266A

Fig
AG

B
FlUI
Idle

Actuator

INTAKE
ACTUATOR

The
intake
actuator
is

actuated

by

the

intake
vacuum
or
the

atmospheric

air
introduced

by
turning
on
or
off
the

vacuum
switch

thereby
opening
or

closing
the
intake

door
The
intake

port
for

atmospheric
air
is

located
on

the
vacuum

switch

The

check
valve

is

a
one

way
valve

and
it

prevents

negative
pressure
from

passing
through
it

except
when
the

pressure
at
the
actuator
side
is

higher

than
at
the

intake
manifold
side

thus

eliminating
the
variation
in

opening
or

closing
the
intake
door

due
to
the

variation
in
the

engine
manifold
vacu

urn