1979 DATSUN 210 ignition

Engine
Tune

up

TROUBLE
DIAGNOSES
AND

CORRECTIONS

Condition
Probable

cause

CANNOT
CRANK

ENGINE
OR

SLOW

CRANKING
Improper
grade
oil

Discharged
battery

Faulty
battery

Loose
fan
belt

Malfunction
in

charge
system

Wiring
connection

loose
in

starting
circuit

F

ul1Y
ignition
switch

Faulty
starter
motor

Trouble
shooting

procedure
on

starting
circuit

Switch

on
the

starting
motor
with

light
ON

WheJlIJght
gOO
off
or

Ii
J1S
considerably

a
Check

battery

b
Check

connection
and
cable

c
Check
starter
motor

When

light
stays
bright
Corrective
action

Replace
with

proper
grade
oil

Charge
battery

Replace

Adjust

Inspect

Correct

Repair
or
replace

Repair
or

replace

a
Check

wlflng
connection

between

battery
and
starter

motor

b
Check

ignition
switch

c
Check
starter

motor

ENGINE
WILL
CRANK

NOR
LLY

BUT

WILL
NOT
START

In
this
case
the

following
trouble

causes

may
exist
but
in

many
cases

ignition
system
or
fuel

system
is
in

trouble

19
ition

syst
m
in
trouble

FII
1

system
in
trowb

Val
mechanism

do
not

work

properly

Low

compression

Trouble
shooting

procedure

Check

spark
plug
firstly
by
following
procedure

Disconnect

high
tension
cable
from

one

spark
plug
and
hold
it

about

10
mm

0
39
in
from
the

engine
metal

part
and
crank

the

engine

Good

spark
occurs

a
Check

spark
plug

b

Checkignition

timing

c
Check
fuel

system

d
Check

cylinder

compression

Check

the
current
now
in

primary
circuit

Very

high
current

Inspect
primary
circuit
for
short

Check
breaker

point
operation

except
tran

sistor

ignition

system
No

spark
occurs

ET
l
6

Engine
Tune

up

Condition
Probable

cause

Low

or
no

current

Ignition
system
out

of

order
Burned
distributor

point

Improper
point

gap

Faulty
condenser

Leak
at
rotor

cap
and
rotor

Faulty
spark
plug

Improper
ignition
timing

Faulty
ignition
coil

Disconnecrion
of

high
tension
cable

Loose
connection

or
disconnection
in

primary
circuit

Lack
offuel

Dirty
fuel

filter

Dirty
or

clogged
fuel

pipe

Fuel

pump
will
not
w0rk

properly

Carburetor
choke
will
not
work

properly

Improper
adjustment
of
float
level

Improper
idling

Dirty
or

clogged
carburetor

Clogged
breather

pipe
of
fuel
tank

Malfunctionin

g
anti

dieseling
solenoid
valve

Malfunctioning
fuel
shut
off
system
FU

models

Incorrect

spark
plug
tightening
or

faulty

gasket

Improper
grade
engine
oil
or
low

viscosity

Incorrect
valve
clearance

Compression
leak
from
valve
seat

Sticky
valve
stem

Weak
or

damaged
valve

springs

Compression
leak
at

cylinder
head

gasket

Sticking
or

damaged
piston
ring

Worn

piston
ring
or

cylinder

Trouble
looting
procedure

Pour
the

engine
oil
from

plug
hole
and
then
measurt

cylinder
compression
Fuel

system
out
of

order

Low

compression

Compression
increases

Compression
does
not

change

ET
17
Corrective
action

Check
for
loose
terminal
or
disconnection
in

primary
circuit

Check
for
burned

points

Repair
or

replace

Adjust

Replace

Clean
or

replace

Clean

adjust
plug

gap
or

replace

Adjust

Replace

Replace

Repair
or

replace

Supply

Replace

Clean

Repair
or

replace

Check
and

adjust

Correct

Adjust

Disassemble
and
clean

Repair
and
clean

Check
for
loose

terminal
or
wire

harness

Check
fuel
shut
off

system
Adjust
or
re

place
if

necessary

Tighten
to

normal

torque
or

replace

gasket

Replace
with

proper
grade
oil

Adjust

Remove

cylinder
head
and

lap
valves

Correct
or

replace
valve
and
valve

guide

Replace
valve

springs

Replace
gasket

Replace
piston
rings

Overhaul

engine

Malfunctiong
cylinder
or
piston
ring

Compression
leaks
from
valve

cylinder
head

or
head

gasket

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

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

Condition

Loss
of

water

Poor
circulation

Corrosion

Overheating

Over

cooling
Cooling
System

TROUBLE
DIAGNOSES
AND
CORRECTIONS

Probable
cause

Damaged
radiator
seams

Leaks

at
heater
connections

or
plugs

Leak
at

water

temperature
gauge

Loose

joints

Damaged
cylinder
head

gasket

Cracked

cylinder
block

Cracked

cylinder
head

Loose

cylinder
head
bolts

Restriction
in

system

Insufficient
coolant

Inoperative
water

pump

Loose
fan
belt

Inoperative
thermostat

Excessive

impurity
in
water

Infrequent
flushing
and

draining
of

system

Inoperative
thermostat

Radiator
fin
choked
with
mud
chaff
etc

Incorrect

ignition
and
valve

timing

Dirty
oil
and

sludge
in

engine

Inoperative
water

pump

Inoperative
torque
coupling
or

tem

coupling

Loose
fan
belt

Restricted
radiator

Inaccurate

temperature
gauge

Impurity
in
water

Inoperative
thermostat

Inaccurate

temperature
gauge

CO
7
Corrective
action

Repair

Repair

Tighten

Tighten

Replace

Check

engine
oil
for

contamination
and
reml

as

necessary

Replace

Check

engine
oil
in

crankcase
for

mixing

with
water

by
pulling
oil

level

gauge

Replace

Tighten

Check
hoses
for

crimps
and
clear
the

system

of
rust
and

sludge
by
flushing
radiator

Replenish

Replace

Adjust

Replace

Use
soft
clean
water
rain

water
is
satis

factory

Cooling
system
should
be
drained
and
flush

ed

thoroughly
at
least
twice
a

year

Permanent
antifreeze

Ethylene
glycol
base

can
be

used

throughout
the

seasons
of
the

year
and

change

periodically
at

intervals

recommended

Replace

Clean
out
air

passage
thoroughly
by
using
air

pressure
from

engine
side
of
radiator

Adjust

Refill

Replace

Replace

Adjust

Flush

radiator

Replace

Use
soft
dean
water

Replace

Replace