1973 DATSUN B110 radiator

Air
intake

system
in

trouble

Overheating

Overcooling

Others

NOISY

ENGINE

Car

knocking

Car
knock
when

coasting
ENGINE

Diny
ur

clogged
fuel
strainer

Fuel

pump
will
not
work

properly

Clogged
carburetor

jets

Clogged
air
cleaner

Air

inhaling
from
manifold

gasket
or
carbu

retor

gasket

Insufficient
coolant

Loosened
fan
belt

Worn
or
defective
fan
belt

Defective
thermostat

Defective
water

pump

Clogged
or

leaky
radiator

Defective
radiator
filler

cap

Air

mixing
into

cooling
system

Improper
grade

engine
oil

Incorrect

ignition
timing

Defective
carburetor

lean
mixture

Defective
thermostat

Low

octane
fuel

Improper
tire

pressure

Dragging
brake

Slipping
clutch

Overloading
to

engine

Carbon

knocking

Timing
knocking

Fuel

knocking

Preignition
misusing
of

spark
plug

Incorrect
throttle

opener
adjustment

Trouble
in
PCV
valve

ET
30
Replace

Repair
or

replace

Disassemble
and
clean

Replace
element

Replace
gasket

Replenish

Adjust

Replace

Replace

Replace

Flush

repair
or

replace

Replace

Retighten
each

part
of

cooling
system

Replace
with

proper
grade
oil

Adjust

Overhaul
carburetor

Replace

Replace
with

specified
octane
fuel

Adjust
to

the
specified

pressure

Adjust

Adjust

Use

right

gear
in

driving

Disassemble
cylinder
head
and
remove

carbon

Adjust
ignition
timing

Use

specified
octane
fuel

Use

specified
spark
plug

Adjust
throttle

opener

Replace
PCV
valve

COOLING
SYSTEM

COOLING
SYSTEM

CONTENTS

DESCRIPTION

WATER
PUMP

Removal

THERMOSTAT

Removal

Inspection
CO
1

CO
2

CO
2

CO
2

CO
2

CO
2

DESCRIPTION

The

cooling
system
is

of
a

closed

pressure
type
with

high
cooling
capability
Cooling
water

flowing
through

resistance
free
water

passages
in
the

cylinder
head
and

cylinder
block
is

maintained
at

adequate

temperature
Installation

RADIATOR

Removal

Inspection

SPECIFICATIONS
CO
3

CO
3

CO
3

CO
3

CO
4

range
at
aU
times

by
means

of
an

ample
capacity
water

pump
of
a

corrugated
fm

type
radiator
with

high
cooling

efficiency
and
of
a

pellet
type
thermostat

I

I

I
0

Jrl
oA

Fig
COol

Cooling
system

CO
I

ENGINE

WATER
PUMP

The
water

pump
is
a

centrifugal
type
water

pump
with

an
aluminum
die
cast

pump
body
The
volute
chamber
is

built
into
the
front

cover
assembly
and

a

high
pressure

sealing
mechanism
is

adopted
to

prevent
the
water
leakage

and
noise

completely

Note
The
water

pump
must
not
be
disassembled
since

the

bearings
are

shrinkage
fitted
to
their
bores
If

any
part
of
water

pump
is
found
defective

replace

pump
assembly

o

C0026

Fig
CO
2
Water

pump
and

front
cover

Removal

Fig
CO
3
Water

pump
removal
Drain

cooling
water

completely

2
Take

the
fan
belt
off
the

pulley

3
Remove
fan
and

pulley

4
Remove
the
water

pump

THERMOSTAT

A

pellet
type
thermostat
is

used
in
the
wa

ter
outlet

passage
to

control
the
flow
of
coolant

providing
fast

engine
warm

up
and

regulating
coolant

temperature
A

wax

pellet
in
the

thermostat

expands
when

heated
and

contracts
when

cooled
The

pellet
is
connected

through
a

piston
to
a
valve

and
when
the

peUet
is
heated

pressure
is

exerted

against
a
rubber

diaphragm
and
the
valve

opens

As
the

pellet
is

cooled
the
contraction

allows
the

spring

to
close
the
valve

Removal

Drain

cooling
water

2
Remove

radiator
hose

3
Remove
water
outlet
elbow

Then
take

out
the

thermostat

11
I
Thermostat

12
Water

outlet

Fig
CO
4
Thermostat
removal

Inspection

To
test
the
thermostat
for

proper
operating
tern

perature
submerge
the
unit
in
a
container
of
water
Heat

the
water
and
observe

the
temperature

CO
2

COOLING
SYSTEM

Measure

temperature
when
the
thermostat

valve

just

starts

rising

U
S
A
Canada
Other

countries

Valve

opening
80
5
to
83
5

86
5
to
89
5
75
to

78

temperature
l77
to

l87
to
167

to

OCeF
183
193
173

Valve
lift
8
95
8
100
8
90

mm

C

0
31
203
0
31

212
0
31

194

in

F

C0011

Fig
CQ
5

Thermostat

inspection

If
thermostat
does
not

operate
at
the
above

specified

temperatures
it

must
be

replaced

Installation

I
When

installing
the
thermostat

apply
adhesive

Three
Bond
to
both
sides
of
the

packing
for

prevention
of
water

leakage

2

Install
the
thermostat
in
reverse

sequence
of
re

moval
RADIATOR

The
radiator
is
of

a
down
flow

type
with
an

expansion

tank

located
on
the

top
of

tube
section

Pressure
is

applied
to
the

system
and
the
relief

valve

incorporated
in
the

radiator
filler

cap
controls

the

pressure
at

approximately
0
9

kg
cm2

l3
Ib

sq
in

Fig
CO

6
Radiator
removal

Removal

I
Drain

cooling
water

2

Disconnect
radiator

upper
hose

lower
hose
and

hose
to
the
reservoir

tank

3

Detach
the
radiator

assembly
by
removing
six

fixing

bolts

Inspection

Check
for
water

leakage
and

cracks

using
a

cap
tester

If

such
defects

are
detected

repair
or

replace
the

radiator

assembly

CO
3

ENGINE

SPECIFICATIONS

Dimensions
of
radiator

core

Height
x
Width
x
Thickness
mm
in
330
x

344
x
32

13
0
x

13
5
x
1
26

Type
Corrugate
fin

type

Radiator
fin

spacing
mm
in
2

5
0
098

Radiator

capacity
K
cal
hoC
335

Water

capacity
with
heater
kg
em
lb

sq
in

t
US

qt
Imp
qt
0
9IO
l
13II4

4

9
5

I
4

X
Cap
working

pressure

SERVICE
JOURNAL
OR
BULLETIN
REFERENCE

DATE
JOURNAL

or

BULLETIN
No
PAGE
No
SUBJECT

CQ

4

CHASSIS

ENGINE
REMOVAL
AND
INSTALLATION

CONTENTS

PR
ECAUTIONS

REMOVAL
ERA

ERA

PRECAUTIONS

Be
sure
to
use
fender
cover

so
that
the

body
is

not

damaged

2
When

lifting
the

engine
or
when

jacking
up
the

engine
pay
attention
for

safety
and

carry
out

operation

correctly
so
that
the

parts
are
not

damaged

REMOVAL

I

Removing
hood

Open
the
hood

remove
four
installation
bolts
and

remove
the
hood

2
Disconnect

the

battery
cable
from
the
terminal

3

Removing
radiator

Drain
water

from
the

radiator
disconnect
two
radiator

hoses
remove

four
radiator
installation
bolts
and
remove

the
radiator

Fig
ER
8
Removin
radiator

4

Removing
cables
and
hoses

Disconnect
the

following
cables
hoses
and
wires

High
voltage
cable
between

ignition
coil
and

distribu
INSTAllATION
ER
6

tor

Cable
to
the
thermal
transmitter

Cable
to
the
oil

pressure
switch

Cable
to
the

primary
side

of
the
distributor

Cable
to
the

starting
motor

Fuel
hose

Cable
to
the
alternator

Heater
hose
for
model
with
heater

only

Wires

for
accelerator
and
choke
The

operation
will
be

carried
out

more

easily
by
removing
the
air
cleaner

Fig
ER
9

Right
side

of
engine
compartment

Fig
ER
10

Left
side

of
engine
compartment

ERA