1979 DATSUN 210 fuel

Condition

IMPROPER
ENGINE

IDLING

Fuelsystam
out
of

order

Low

1
ion
Engine
Tune

up

Probable
cause

Clogged
or

damaged
carburetor

jets

Incorrect
idle

adjustment

Clogged
air
cleaner
filter

Damaged
manifold

gaskets
or
carburetor

insulator

bnproper
float
level

adjustment

LoOse
air
hoses

or
air
fuel
mixture

hoses
of

carburetor

Malfunctioning
carburetor
choke

Malfunctioning
anti

backfire
valve

Malfunctioning
automatic

temperature
con

trol
air
cleaner

Inoperative
idle

compensator

Carbon
canister

purge
line
hose

damaged
or

disconnected

Stick
E
F
E
v

ve
shaft

Othen
Incorrect
valve
clearance

Extremely
low
revolution

Malfunction
of

the

ignition
system
spark

plug
high
tension
cable

ignition
coil
etc

incorrect
basic

ignition
timing

Malfunction
of

chol
e

valve
or

linkage

Malfunction
of

vacuum
motor

sensor
or

hoses
of

air
cleaner

Incorrect
idle

adjustment

Cloged
air
cleaner

fIIter

Malfunction

of
idle

compensator
of

air

cleaner

Malfunction
of
E
G
R

control
valve

Loose
manifold
and

cylinder
head
bolts

Higli

engine
idle

opem
Dragged
accelerator

linkage

Incorrect
idle

adjustment

Malfunction
of

T
O

C
s

system
or
tluottle

opener
Except
FU
models

Malfunction
of

speed
switch
and
harness

Except
FU
models

ET

18
Corrective
action

Clean
or

replace

Adjust

Replace
element

Replace
gasket
or
insulator

Adjust

Check
for
loose
connections

Check

lUId
adjust

Check
for
loose
connection

of
vacuum
hose

Check
A
I

C
air

cleaner

Check
for
connection

of
idle

compensator

hose
or

replace
idle

compensator

Connect
or

replace

Repair

Previously
mentioned

Adjust

Adjust

Replace

Adjust

Adjust

Check
for
loose
hoses

Replace
system
com

ponentsif
necessary

Adj
lSt
idle

speed

Replace
air

cleaner
filter

Replace

Clean
or

replace

Retighten
bolts

Check
ahd
correct
accelerator

linkage

Adjust
idle

speed

Check
for
loose
vacuum
hose
and
harness

connections

Adjust
replace
if
necessary

Check
for
loose
connections

Repair
or

replace
if

necessary

Condition

ENGINE
POWER
NOT

UP

TO
NORMAL

Low

compmsion

Ignition
system
out
of

order

Fuel

system
out
of

order

Air
intake

system
out

of

order

Emission
control

Overheating

J

f
H
r

Overcooling
Engine
liune
up

Probable
cause

Malfunction
of
throttle
valve
switch
and

linkage
FU

models

Incorrect

ignition
timing

Damaged

spark
plugs

Wom
distributor

points

Malfunction
of

T
C
S

cMalfunction
of
S
D
V

Milfunction
of
choke

system

Clogged
fuel

pipe
or

floating
valve

Dirty
or

clogged
fuel
filter

Fuel

pump
will
not
work

properly

Clogged
carb

retor

jets

Clogged
air
cleaner

Air

aling
from
manifold

g
sket
r

carburetor

gasket

Malfunction
of
E

G
R
valve

Stick
E

F
E
valve
shaft

Insufficient
coolant

Loose
fan
bel

Wom
or
oiled
fan
belt

Inoperative
therinostat

Wom
ater

pu
p

Clogged
or
leaky
radiator

Wom
radiator
filler

ca

Air
in

cooling
ystein

Improper
engine
oil

grade

Incorrect

ignition
timing

Clogged
carburetor

lean
miiture

Inoperative
thermostat

1

ET
19
Corrective
action

Check
throttle
valve
switch
and

linkage

Adjusi
i
r

replace
if

necessary

Previously
m
entioned

Adjust

Clean

adjust
or

replace
plugs

Dress
or

replace
points
Also
check

condenser

Check
and

correct

Check
and

replace

Adjust

Clean

Replace

Repair
or

replace

t
J
Disassemble
and
clean

Replace
element

Replace

gasket

Check
and

replace

Repair

Replenish

Adjust
fan
belt

Replace

Replace

Repl
ce

Flush

repair
or

replace

ReplaCe

Retightin
e
ch

part
of

cooling
system

Replace
with

proper
grade
oil

Adjust

Overhaui
carburetor

Replace

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

29

Apply
engine
oiho
both
ends

of

push
rods
and
insert
in

proper
se

quence

30

Apply

engine
oil
to

valve
stem

end
and

rocker
arm
contact

surfaces

Position
rocker
shaft

assembly
on

cyI

inder
head

31

Tighten
rocker
shaft
bracket

bolts
to

specified
torque

fJ

Tightening
torque

Rocker
shaft
bracket
bolts

2
0
to
2
5

kg
m

14
to
18
ft

b

Note

Tightening
should
be
done

in

two
or
three

stages
outwardly
from

center
bracket

EM506

Fig
EM

77
Rocker

Shaft
Bolt

Tightening
Sequence

32

Adjust
valve

clearance
to

speci

fied
value

Note

a
First

set
clearance
to
0

25

mm

0
0098

in
when

engine
iscold

b
After

engine
has
been
assembled

warm
it

up
for
at
least
several

minutes

finally

adjust
clearance
to

specification
For
details
refer
to

Adjusting
Intake
and
Exhaust
Valve

Clearance
in
ET

Section

EM507
or

Wrench

2
Screwdriver

3
Feeler

gauge

Fig
EM
78

Adjusting
Value

Clearance
Engine
Mechanical

Valve

clearance

Intake
and

exhaust

hot

0
35
mm
0
014
in

cold

0

25
mm
0
010
in

fJ

Tightening
torque

Velve
rocker

adjusti
g
nut

1
6
to
2
2

kltm

12
to
16
ft
b

33

Install
rocker

cover

34

Install
intake
and

exhaust
mani

folds

fJ

Tightening
torque

Manifold
nuts

1
5
to
2
0

kg
m

11
to
14

fHb

Note

When

installing
intake
and
ex

haust

manifolds
locate
bolt

in

center
of

fitting
hole

EM528

Fig
EM
79

Installing
Manifolds

35
Install
E
G
R
control

valve

36

Install
baffle

plate
and

carbure

tor

fJ
Tightening

torque

Carburetor
nuts

0
4

to
0
6

kg
m

2
9
to
4
3
ft

Ibl

37
Install
vacuum

control
valve
as

sembly
and
bracket

38
Install

air
cleaner

bracket
and
air

cleaner

39

Connect
air

vacuum
and

blow

by
hoses
to
air

cleaner

40
Install

pipe
connector
to
control

valve
hose
and

engine

mounting
brack

etLR

41

Install

distributor

EM

16
CAUTION

a
8e
sure
to
set
No
1

piston
to

LD
C
of

compression
stroke

b
Before

instaliation
return
distribu

tor
rotor

approximately
30

degrees

from
its
correct

position
Insert

distributor

meshing
distributor

drive

gear
and
driven

gear

c
After
installation
distributor
rotor

should

align
with

mark
on
rotor

cap

J

No
1

mark

EM508

Fig
EM

80
Cornct
P05ition

of

Rotor

42

Dismount

engine
from

Engine

Stand

ST0501S000
and

place
it

on

suitable

engine
stand

Re

move

Engine
Attachment

KVlOI
2500

43

Install

spark
plugs
and

engine

mounting
bracket
R
H

44

Install
oil

pump
and
ftIter

assem

bly

45
Install
thermostat

and
water

outlet

46
Install
fuel

pump
and
fuel

lines

Do
not

forget
to

install

spacer
and

gasket

47

Install
distributor
vacuum
line

48
Install
distributor

cap
and

high

tension

cables
as
an

assembly
Connect

high
tension

cables

49
Insert

oil
level

gauge

50

Install
fan
fan

pulley
and
fan

spacer

Lock
bolt

by
bending
lock

washers

51

Install
alternator
bracket

adjust

ing
bar
water

pump

pulley
alternator