air condition DATSUN 210 1979 User Guide

Condition

Othen

NOISY
ENGINE

Cor

knockillll

M8chanicol

knocking

Crankshaft

bearing

knocking

Connecting
rod

bearing
knocking

Piston
and

cylinder

noise

Piston

pin
noise

Water

pump
noise

Air

pump
noise

Others
Engine
Tune

up

Probable
cause

Improper
octane
fuel

Improper
tire

pressure

Dragging
brake

Dutch

slipping

Overloaded

engine

Carbon

knocking

Timing
knocking

Fuel

knocking

Preignition
miswing
of

spark
plug

This

strong
dull
noise
increases
when

engine

is
occelerated
To
locate
the

place
cause
a

misfire
on
each

cylinder
If
the
noise

stops

by
the
misfire
this

cylinder

generates
the

noise

This

is
a
little

higher
pitched
noise
than
the

crankshaft

knocking
and
also
increases

when

engine
is
accelerated
Cause
a
misfire

on
each

cylinder
and
if
the
noise
diminishes

almost

completely
this
crankshaft

bearing

generates
the
noise

When

you
hear
an

overlapping
metalic
noise

which
increases
its

magnitude
with
the

revolution
of

engine
and
which
decreases
as

engil
e
is
warmed

up
this
noise
is
caused

by

piston
and

cylinder
To
locate
the

place

cause
a
misfire
on
each

cylinder

This

noise
is
heared
at
each

highest
and

lowest
dead
end
of

piston
To
locate
the

place
cause
a
misfire

on
each

cylinder

This
noise

may
be
caused

by
worn
or

damaged
b

arings
or

by
the
uneven
surface

of

sliding
parts

Damaged
air

pump
Except
Canada
and
FU

models

An

improper
adjustment
of
valve
clearance

Noise
of

timing
chain

An
excessive
end

play
on
crankshaft

Noisy
E
F
E

valve
shaft

H20
Corrective
action

Replace
with

specified
octane
fuel

Inflate
to

sptcifled
pressure

Adjust

Adjwt

Use

right
gear
in

driving

Disassemble

cylinder
head

and
remove

carbon

Adjust
ignition
timing

Use

specified
octane
fuel

Use

specified

spark
plug

This
is
caused

by
worn
or

damaged
bearings

or

unevenly
worn
crankshaft
Renew

bearings
and

adjust
or

change
crankshaft

Check
lubrication

system

Same
as
the
case
of
crankshaft

bearings

This

may
cause
an
abnormal

wearing
of

cylinder
and
lower

compression
which
in

turn
will
cause
a
lower
out

put
power
and

excess
ive
consumption
of
oil

Overhaul

engine

This

may
cause
a
wear
on

piston
pin
or

piston
pin
hole

Renew

piston
and

piston
pin
assembly

Replace
water

pump
with
a
new
one

Repair
or

replace

Adjust

Adjust
the
tension
of
chain

Disassemble

engine
and
new
main

beaung

Repair

Condition

ABNORMAL

COMBUSTION

backfire
afterfire

run
on
etc

Improper
ignition
timing

Fuel

system
out
of

order

Feulty
cylinder
heed

etc

Others

EXCESSIVE
OIL

CONSUMPTION

Oilleek8111
Engine
Tune

up

Probable
cause

Surging
A
T
C
air

cleaner
vacuum
motor

Note
This
noise
will
be
hmnl
when
clutch

iI

disengaged

We
r
on
clutch

pilot

bushing

Not
e
This
noise
will
be
heared
when

utch
iI

disengaged

Improper
ignition
timing

Improper
heal

range
of

spark
plugs

Damaged
carburetor
or
manifold

gasket

backfire
aftedire

Clogged
carburetor

jet

Improper
function
of
the
float

Uneven

idling
Run
on

Improperly
adjusted
T
O
C
S
set

pressure

Except
FU

models

Malfunction
of
anti

dieseling
solenoid
valve

Malfunction
of
fuel
shut
off

system
FU

models

Malfunction

or
auto
hoke

Improper
y

adjusted
valve
clearance

Excess
carbon

in
combustion
chamber

Da
laged
alve

spring

backfire
after
he

Malfunction
of
A
T
C
air
cleaner

Inoperative
anti4lackfire
valve

Loose
oil

tain
plUI

ose
or

damaged
oil

pan
gasket

Loose
or

damaled
chain
cover

gasket

Wom
oil
seal
in
front

and
rear
of
crankshaft

Loo
or

damaged
locker

cover

gasket

Improper
lilhtening
of

oU
filter

Loose
or

damaled
oil

pressure
switch

ET
21
Corrective
action

Repair
or

replace

Renew
bush

and

adjust
drive
shaft

Adjust
ignition
liming

Use

specified
spark
plugs

Replace
them

with
new

parts

Disassemble
carburetor
and
check
it

Adjust
the
level
and
check
needle
valve

Adjust

Adjust

Check

or

replace

Check
fuel
shut
off

system

Adjust
or
re

place
necessary

Adjust

Adjust

Remove
head
and

get
rid
of
carbon

Replace
it
wit
a

new
one

Check
for
loose
vacuum
hoses

Replace
if

necessary

Replace

Tighten
it

Renew

lasket
or

tighten
iI

Renew

gasket
or

lighten
it

Renew
oil
seal

Renew

gasket
r

lighten
it
but

not
too

much

Renew

gasket
and

tighten
it
with
the

proper

torque

Renew
oil

pressure
switch
or

tighten
it

Condition

Ex
iv
oil

consumption

Odlen

POOR
FUEL

ECONOMY

See
the
explanation

oI
thtI

power
cIec

01hen

PROBLEM
IN

OTHER

FUNCTIONS

t
1

oil

pre

E
eronthe

lIiding
par1J

Scuffing
oIlliding

par1J
Engine
Tune

up

Probable
cause

Cylinder
and

piston
wear

Improper
lOcation
of

pi5ton
ring

gap
or

reversely
assembled

piston
ring

Damage
pi5ton
r

gs

Wom

pilton
ring
groove
and

ring

Fatigue
of
valve
oil
seal

lip

Worn
valv
stem

Inadequate
qUality
of

engine
oil

Engine
overheat

Exceeding
idling
revolution

Inoperative
acceleration

covel

Fuelleakage

Malfunction
of
T
O
C
S

Except
FU
mod

els

Malfunction
of

A
T
C
air
cleaner

Inadequate
oil

quality

Overheat

Worn
oil

pump
regulator
valve

Functional
deterioration
of

oil

pump

Blocked
oil
filter

Increased
clearanCe
in
various

sliding
parts

Blocked
oil

strainer

Inoperative
oil

gauge
pressure
switch

Oil

pressure
decreases

Improper
quality
or
contamination
of
oil

Damaged
air
cleaner

Overheat

or
overcool

Improper
fuel
nUxture

Decrease
of
oil

presSure

Insufficient
clearances

ET
22
Corrective
action

Overhaul

cylinder
and
renew

piston

Remount

piston
rings

Renew

rings

Repair
or
renew

piston
and

cylinder

Renew

piston
and

piston
ring

Replace
seal

lip
with

a
new
one

Renew
valve
or

guide

Us
the

designated
ou

Previously
mentioned

Adjust
it
to
the

designated
rpm

Adjust
it

Repair
or

lighten
the
connection
of
fuel

pipes

Adjust

Check
and

replace

Use
the

designated
oil

Previously
mentioned

Disassemble
oil

pump
and

repair
or
renew
it

Ref4ir
or

replace
it
with
I
new
one

Renew

i
t

Disassemble
and

replace
the
worn

parts
with

n
w

of
es

Clean
it

Replace
it
with
a
new
one

Previously
mentioned

Exchange
the
oil
with

proper
one
and

change
element

Otange
element

Previously
mentioned

Oteck
the
fuel

system

Previously
mentione
d

Readjust
to
the

designated
clearances

Engine
Tune

up

Condition
Probable

cause

Overheat

Improper
fuel

mixture

Floor

temp
ture
too

high
California
and

FU
model
Problem
in

fuel

system
Refer
to

Inspec

tion
of
Fuel

System

Problem
in

ignition
system

Refer
to
In

spection
oflgnition
System
Corrective
action

Previously
mentioned

Check
the
fuel

system

Check
and

repair

Check
and

repair

SPECIAL
SERVICE
TOOL

Kent
Moore
No

Tool
number
tool

name
Reference

page
or

Fig
No

STl9320000
Oil
filter
wrench

125664

Page
ET
3

ET
23
Kent
Moore

No

Tool
number
tool
name
Reference

page
or

Fig
No

PRELIMINARY

CLEANING
AND

INSPECTION

Before

disassembling
engine
ob

serve
the
following
items

I

Prior
to

disassembling
check

outer

parts
for

sign
of
leak

past
their

gasketed
surfaces

2
Check
carburetor
and
fuel

pump

for
condition
fuel
hoses
for
deteriora

t
ion

cracks
or
otherwise

leakage
of

fuel

past
their

jointed
or

connected

surfaces

3

Wipe
dust
and
mud
off

engine

4

Inspect
outer

parts
for
visual

faults
and
broken
or

missing

parts
such

as
bolts
and

nuts

5
Check

piping
and
electrical
cir

cuits

for
deterioration
breakage

fittings
discontinuity
or
insulation

DISASSEMBLY

To

remove

engine
from
car
refer
to

Section
ER

for
Removal

1
Remove

starting
motor
then
re

move
transmission
from

engine

2
Remove
clutch
assembly

3
Remove

alternator
fan
belt
alter

nator
bracket
and
alternator
adjusting

bar

4
Remove

idler
pulley
air

pump

belt
and
idier

pulley
bracket

If
so

equipped

Note
Loosen
idler

pulley
nut
and

belt

adjusting
bolt
in
that
order

@

1

Idler

pulley
nut

2
Belt

adjusting
bolt

3
Air

pump
belt

4
Idler

pulley
bracket
EM527

Fig
EM
2

Removing
Idle

Pulley

Air

Pump
Belt
and
Idle

Pulley
Bracket
Engine
Mechanical

ENGINE
DISASSEMBLY

5

Remove
air

pump
pulley
air

pump
and
air

pump
bracket
If

so

equipped

6
Remove
fan
fan

spacer
and

pul

ley

7
Remove

oil
level

gauge

8
Remove

distributor

cap
and

high

tension

cables
as
an

assembly

9
Disconnect
distributor
vacuum

line
from
distributor
and
remove
dis

tributor

10
Disconnect

fuel
line
from

carbu

retor

II
Remove
fuel

pump
and
fuel
line

12
Remove
water
outlet
and

thermostat

13
Remove

engine
mounting
brack

et
R
H

14
Remove

oil

pump
and
filter
as

sembly

EL043

Fig
EM

3

Removing
Oil

Pump

15

Remove

spark
plugs

16

Install

Engine
Attachment

KVlOI02500
to

cylinder
block

using

engine

f1
ounling
bracket

R
H
attach

ing
studs
fuel

pump
attaching
studs

and
alternator

bracket

attaching
bolt

holes

17
Mount

engine
on

Engine
Stand

ST050I
SOOO

Fig
EM
4

EM
3
18
Remove

engine
mounting
brack

et

L
H

19
Disconnect

air
vacuum
and

blow

by
hoses
from
air

cleaner

20
Remove
air
cleaner
and
air

cleaner
brackets

21

Remove
vacuum
control
valve

assembly
and
bracket

as
a
unit

22
Remove
carburetor
and
baffle

plate

23

Remove
E
G
R
control
valve

24

Remove
intake
and
exhaust

manifold
assemblies

EM528

Fig
EM
5

Removing
Manifold

25
Remove
P
C
V

hose

pipe
con

nector
to
control
valve

26
Remove

rocker
cover

27
Loosen
valve
rocker

adjusting

nut
and
turn

adjusting
screws
out
to

disengage
push
rods
Then

evenly

loosen
rocker
shaft
bolts

28
Remove
rocker
shaft

assembly

EM453

Fig
EM
6
Removing
Rocker

Shaft

Assembly

29
Withdraw

push
rods
and

keep

them
in

correct
order
1

30
Loosen

cylinder
head
bolts

a

little
at
a
time

in
the

sequence
shown

in

Fig
EM
and
remove

cylinder

head

Engine
Mechanical

TROUBLE
DIAGNOSES
AND
CORRECTIONS

Condition

I

Noill
f
onglno

Knocking
of
crank

shaft
and

bearing

Piston
and

connecting
rod

knocking

Camshaft

knocking

Timilli
chain
noise

Camshaft
and
valve

mechanism
knock

ing
Probable
cause

Loose
main

bearing

Seized

bearing

Ben
crankshaft

Excessive
crankshaft
end

play

Loose

bearing

Seized

bearing

Loose

piston

pin

Loose

piston
in

cylinder

Broken

piston

ring

Improper

connecting
rod

alignment

Loose

bearing

Exc
essive

axial

play

Rough
ge
r

teeth

8roken
cam

gear

Improper
chain
tension

Worn
and
or

damaged
chain

I

Wom

sprocket

Worn
and
or
broken
tension

adjusting
mecha

nism

Excessive
camshaft
and

bearing
clearance

Improper
valve
clearance

Worn

adjusting
screw

Worn

rocker
face

Loose
valve
stem
in

guide

Weakened
valve

pring

Seized
valve

EM

31
Corrective
action

Replace

Replac

Repair
or

replace

Peplace
center
thrust

bearing

l

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

Condition

Waterpurnp

knocking

II
Othw

mllChani

troubl

Stuck

valve

Seized
valve

seat

Excessively
wom

cylinder
and

piston
Engine
Mechanical

Probab
Ie
cause

Improper
shaft
end

play

Broken

impeller

Improper
valve
clearance

Insufficient
clearance
between
valve
stem
and

guide

Weakened
or
broken
valve

pring

Biting
or

damage
of
valve
stem

Poor
fuel

quality

Il1
prop
r
valve
clearance

Weakened
valve

pring

Thin
valve
head

edge

Narrow
valve

seat

Overheating

Over

speeding

Sticked
valve

guide

Shortage

ofengine
oil

Dirty
engine
oil

Poor
oil

quality

Overheat

Wrong
assembly
of

piston
with

connecting
rod

Improper
piston
ring
clearance

Dirty
air
cleaner

Too
rich
mixture

Engine
over
run

Stuck
choke
valve

Over

choking

EM
32
Corrective

action

Replace

Replace

Adjust

Clean
stem
or
ream
the

guide

Replace

Repil
ce
or
clean

Use

good
fuel

Adjust

Replace

Replace
valve

Reface

Repair
or

replace

Drive
at

proper
speed

Repair

Add
or

replace
oil

Check
oil
level
on

daily
basis

Clean
crankcase

replace
oil
and
re

place
oil
ftIter
element

Use

proper
oil

Repair
or

replace

Repair
or

replace

Adjust

Clean

periodically

Adju
t

Drive

correctly

Clean
and

adjust

Start
in
correct

way

Condition

Faulty

connecting

rod

Faulty
crankshaft

bearing
Engine
Mechanical

Probable

cause

Shortage
of

engine
oil

Low
oil

pressure

Poor

engine
oil

quality

Rough
crankshaft
surface

Clogged
oil

passage

Bearing
worn
or
eccentric

Bearing
improperly
assembled

Loose

bearing

Incorrect

connecting
rod

alignment

Shortage
of

engine
oil

Low
oil

pressure

Poor

quality
engine
oil

Worn

or
out
of
round
crankshaft

journal

Clogged
oil

passage
in
crankshaft

Bearing
worn
or
eccentric

Bearing

inproperly
assembled

Non
co
centric
crankshaft

or

bearing

EM
33
Corrective
action

Add
or

replace
oil

Check
oil
level
on

daily
basis

Correct

Use

proper
oil

Grind
and

replace
bearing

Clean

Replace

Repair

Replace

Repair
or

replace

Add
or

replace

Check
oil
level
on
daily
basis

Adjust

Use

proper
oil

Repair

Clean

Replace

Repair

Replace

2
Loosen

belt
then
remove
fan

blade
from

torque
coupling
and

torque
coupling
and

pulley
from

hub

Air

conditioning
system
equipped

models

only

4
Remove

pump
assembly
and

gas

ket
from
front
cover

C0051

Fig
CO
3

Removing
Water

Pump

INSTALLATION

1
Be
sure
to
clean
the

gasket
sur

faces
in
contact
with

pU
flP
and
front

cover

Always
use
new

gaskets
when

installing
pump
assembly
Be

sure
to

tighten
bolts

i
l
Tightening

torque

Water

pump

securing
bolts

0
9
to
1
4

kg
m

6
5
to
10
1
ft
Ib

2
Fill

cooling
system
and

check
for

leaks
at

pump

3

InstaD
fan

pulley

spacer
or

torque

coupling
and

fan
blade

and

tighten
attaching
bolts

securely
Install

belt

and

adjust
for

specified
tension

4

Operate
the

engine
at

fast
idle

and

re

Check
for
leaks

S

Install
fan

shroud

Note

Ensure
that
clearance
between

shroud
and
fan
even
at

any

place

DISASSEMBLY

Water

pump
should
not
be
disas

sembled
Cooling

System

INSPECTION

Inspect
pump
assembly
for
the

following
conditions
and

replace
if

necessary

I

Badly
rusted

or
corroded

body

assembly
and
vane

2
Excessive
end

play
or

roughness

of

bearings
in

operation

Note
If

excessive
mechanical
seal

squeak
occurs
when

engine
is
mn

ning
use
suitable
water

pump
seal

lubricant
to

prevent
squeak

ADJUSTMENT

Check
belt
deflection
between

alternator
and

fan

pulley
by
a

force
of

10

kg
22
Ib

Fan
belt
deflection

8
to
12

mm

0
31
to
0
47
in

If

adjustment
is

necessary
loosen

bolt

retaining
alternator

adjusting
bar

to
alternator
Move
alternator
toward

or

away
from

engine
until
the

correct

tension
is

obtained

TORQUE
COUPLING

The

torque
coupling
keeps
the
fan

speed
at
2
900

rpm
rated

or
below
to

conserve

horsepower
at

high

engine

speed
It
also

helps
reduce
fan
noise
to

a
minimum

during
high
speed
opera

tion

This
unit
is
filled
with
a

special

silicone
oil
used

as
a
fluid

coupling

which
controls
the

fan

speed
Silicone

oil

can
not
be

replenished

The

torque
coupling
is
installed

only
on
the
model

equipped
with
the

air

conditioning
system
In
this
case

use
7
x
350
mm

13
78
in
diam

eter

cooling
fan

CO
3
C0052
t
Wheel

2
Disc

3

Bearing

Fig
CO

4

Torque
Coupling

REMOVAL

Lousen
fan

belt

2
Remove

fan
blade
from

torque

coupling

3
Remove

torque

coupling
from

pulley
and
water

pump
hub

by
re

moving
securing
nuts

INSTALLATION

I
InstaD
the

torque
coupling
in
the

reverse
order
of
removal

2
Install
belt
and

adjust
belt

ten

sian

DISASSEMBLY

The

torque
coupling
is
so

designed

that

it
can
not
be

disassembled

INSPECTION

Inspect
torque

coupling
for
oil

leak

age
If

necessary
replace

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