horn DATSUN 510 1969 Service Repair Manual

EngIne

INTRODUCTION

ENGINE

Removal

ENGINE

DismantUng

ENGINE

Inspection
and
Overhaul

VALVES
VALVE
GUIDES
VALVE
SEAT
INSERTS

CAMSHAFT
AND
CAMSHAFT

BEARINGS

Checking

CYliNDER

BLOCK

PtSTONS

AND
CONNECTING
RODS

INTRODUCTION

The
1400
1600
cc

and
1800
cc

engines
are
four

cylinder

in
line
units
with
a

single
overhead
camshaft

and

fully
balanced

five

bearing
crankshaft

The
valves
are

operated
through
rockers

which
are

directly
activated

by
the

earn
mechanism

The
crankshaft
is
a

special
steel

forging
with
the
centre

main

bearing

equipped
with
thrust
washers

to
take

up
the
end

thrust

of
the
crankshaft
The

special
aluminium

pistons
are
of

the
strut

construction
to

control
thermal

expansion
and

have

two

compression
rings
and
one
combined
oil

ring

The

gudgeon
pins
have

special
hollow
steel
shafts

and
are

a

fully
floating
fit
in

the

pistons
and
a

press
fit

in
the

connecting

rods

The
aluminium

alloy
cylinder
head
contains

wedge
type

combustion
chambers

and
is
fitted
with
aluminium

bronze
valve

seats

for
the
intake
valves

and
heat
resistant
steel
valve
seats

for
the
exhaust

valves

The
cast

iron
camshaft
is
driven

by
a
double
row
roller

chain
from
the
crankshaft

pulley

The

engine
is

pressure
lubricated

by
a
rotor

type
oil

pump

which
draws
oil

through
an

oil
strainer
into
the

pump
housing

and
then
forces

it

through
a
full
flow

oil
filter

into
the
main
oil

gallery

ENGINE
Removal

Place

alignment
marks
on
the
bonnet

and

hinges
remove

the
bonnet
from
the
vehicle

2

Drain
the

cooling
system
and
engine
and
transmission

lubricant
Remove

the
radiator

grille

3
Discon
ect
the

battery
cables

and
lift
out
the

battery

4
Detach
the

upper
and
lower
radiator

hoses
remove

the

radiator

mounting
bolts
and
lift
the
radiator

away
from

the
vehicle

The

torque
converter

c

jng
pipes
must

be

disconnected
from
the
radiator
on
vehicles

fitted
with

automatic
transmission

S
Remove

the

COOling
fan
and

pulley
disconnect

the
fuel

pipe
from
the
fuel

pump
and

the
heater
hoses
from

the

engine
attachments

6
Disconnect

the
accelerator
control

linkage
and
the

choke
CRANKSHAFT
AND
MAIN
BEARINGS

CAMSHAFT
AND
SPROCKET

FLYWHEEL

ENGINE

Assembling

VALVE
CLEARANCES

Adjusting

ENGINE

LUBRICATION
SYSTEM

OIL
PUMP

OIL
FILTER

CHANGING
THE
ENGINE

OIL

cable
from
the

carburettor

7
Disconnect

the

wirings
from

the
starter
alternator

ignition
coil
oil

pressure
switch

and

temperature
sender

unit

8
Remove

the
clutch
slave

cylinder
Fig
A
2

and
its
return

spring

9
Disconnect

the

speedometer
cable
and
withdraw

the

plug

connector
from
the

reversing
light
switch

10
Disconnect

the
shift
rods
and
seJector

rods
and
remove

the
cross
shaft

assembly
as
described

in
the
section
Gear

box

II
Disconnect

the
front
exhaust

pipe
from
the

exhaust

manifold
disconnect
the
centre

pipe
from

the
rear

pipe

and
remove

the
front

pipe
pre
muffler
and
centre

pipe

assembly

12
Disconnect
the

propeUer
shaft

flange
from
the

companion

flange
from
the

gear
carrier

13
Jack

up
the

gearbox
slightly
and
remove
the
rear

engine

mounting
bracket
bolts
remove
the

mounting
cross

member
and
handbrake

cable

c1amp

14
Remove
the
bolts

securing
the
front

engine
mounting

brackets
to
the
crossmember

15

Attach

lifting
cable
or

chains
to
the
hooks
installed
at

the
front
and
rear
of
the

cylinder
head

Lower
the

jack

under

the

gearbox
and

carefully
lift
and
tilt
the

engine
and

gearbox
unit
Withdraw
the

engine
and

gearbox
from
the

compartment

making
sure
that
it
is

guided

past
the

accessories
installed
on
the

body

ENGINE

Dismantling

Remove
the

engine
as

previously
described
and

carefully

clean

the
exterior
surfaces

Cbeck
for

signs
of
fuel
oil
or

water
leaks

past
the

cylinder
head
and
block
Remove
the
air

cleaner
alternator

distributor
and
starter
motor

Plug
the

carburettor
air
horn

and
distributor
hole
to

prevent
the

ingress

of

foreign
matter

Remove
the

gearbox
from

the

engine
drain
the

engine
oil

and
coolant
Mount
the

engine
in
a
suitable

stand
the

special

engine
attachment
ST05260001
and

engine
ST0501SOO0
should

be
used
if
available

Fig
A
3

5

SteerIng

DEsn
IPTION

S
i
EERlNG
MaintenaDce

STEERING
WHEEL
AND
STEERING
GEAR

Removal
and
Installation

STEERING
GEAR

Dismantling

STEERING
GEAR

Inspection
and
Adjustment

DESCRIPTION

A
worm
and

recirculating
ball

type
steering
system
is

fitted
to

the
vehicle
the

component
parts
of
the

steering
gear

are
shown
in

Fig
K
I

The

steering
linkage
consists
of
the
centre
tie
rod

pitman

ann
idler
arm
outer
tie
rods
and
the
knuckle
arms
as
shown

in

Fig
K
2

A

collapsible
steering
column
assembly
can
be
fitted
to
the

vehicle
to

protect
the
driver
from

injury
in
a
head
on

collision

Details
of
this

type
of

assembly
are

given
under
the

appropriate

heading

STEERING
Maintenance

O1eck
the
oil

level
in
the

steering
box
every
10
000
km

6
000
miles
and

top
up
with
recommended
lubricant
if

necessary

Grease
the

steering
linkage
every
50
000
km
30
OOO

miles
It
will
be

necessary
to

replace
the

plug
in
the
tie
rod
ball

joints
with
a

grease
nipple
for
this

operation
as

previously

described
in
the
section
FRONT
SUSPENSION

Use
a

grease
gun
to

completely
replace
the
old

grease
with

new

grease
making
SUfe
that
the

grease
is
not
forced
from
under

the
cover

clamp
if
a

high

pressure
gun
is
used

STEERING
WHEEL
AND
STEERING
GEAR
Removal

1
Take
out
the

retaining
bolts
and
remove
the
horn
ring

remove
the

steering
wheel
nut

Fig
K
3
and

pull
off

the

steering
wheel
The
special
tool
ST
27180000
should
be

used
if
available

2
Disconnect
the

battery
leads
remove

the
steering
column

shell
covers

and
the
turn

signal
and

lighting
switch
assembly

3
On
vehicles
fitted
with

steering
column

gear
change

assemblies
the

gear
lever
must
be
removed
from
the

control
rod

assembly
Unscrew
the
retaining
boltg
and

disconnect
the

gear
lever

4
Remove
the
bolts
from
the

steering
column

upper
clamp

Fig
K
4
and
the
bolts

holding
the
lower

plate
Fig
K
5

5
If
the
vehicle
is
fitted
with

steering
column
gear
change

remove
the

cotterpin
from
the
trunnion
and
detach
the

gearchange
rod
and
selector
rod
from
the

change
lever
and

selector
lever
STEERING
GEAR

Assembly
and

Adjustment

COLLAPSIBLE
STEERING

COLLAPSIBLE
STEERING
Removal
and

Inspection

COLLAPSIBLE
STEERING
Installation

STEERING
LINKAGE

6
Remove
the
bolts

securing
the

steering
gear
housing
to

the
car

body
Fig
K
6
and

pull
the
steering

gear
towards

the

engine
compartment

Remove
the
gearchange
control
from
the

steering
gear

assembly
as
described
in
the
section
GEARBOX

STEERING
WHEEL
AND
STEERING
GEAR
Installation

Installation
is
a
reversal
of
the
removal

procedure
When

the
installation
has
been
completed
make
sure
that
the

steering

wheel
can

be
turned

smoothly
and
is
correctly
aligned
The

free
travel
of
the

steering
wheel
should
be
between
2S
30mm

0
9B
1
18
in
Tighten
the

steering
wheel
locknut
to
a

torque

reading
of
4
0
5
0

kgm
29
36Ib
ft
and
the

steering
column

upper
clamp
and
plate
bolts
to
a

torque
reading
of
1
3
1
8

kgm

94
1
3
Ib
ft

Ensure
that
the

steering
box
is
topped
up
to
the
correct

level
with
recommended
lubricant

STEERING
GEAR

Dismantling

Remove
the

pitman
arm

retaining
nut

and
pull
out
the
arm

The

special
puller
ST
27140000
should
be

used
if
available

Remove
the
drain

plug
from
the

steering
gear
housing
and

drain
the
oil

Slacken
the

adjusting
screw
nut
and
turn
the
sector
shaft

adjusting
screw
a
few
turns
in
the
anti
clockwise
direction

Remove
the
sector

shaft
cover

retaining
bolts
and

pull
the

sector
shaft
cover
and
sector
shaft
from
the
gear
housing
Fig

K
7

Remove
the
bolts

securing
the
column

jacket
to
the

gear

housing
and

carefully
withdraw
the
main
column
jacket
assembly

from
the
gear
housing
Fig
K
B

NOTE
The
ball
must
not
be
allowed
to
run
to
either
end
of

the
worm
or
the
ends
of
the
ball

guides
will
be

damaged

Pull
the
column
assembly
from
the
column
jacket
Remove

the
sector
shaft
oil
seal
and
take
out
the
rear

bearing
outer

race

from
the
column

jacket
with
a
suitable

puller

Withdraw
the

bearing
inner
races
from

the
front
and
fear

worm

bearings

Remove
the
column
shaft

bearing

91

the

system

operates
smoothly

COLLAPSIBLE
STEERING

The

collapsible
steering
column
is

designed
so
that

compression
occurs
when
the
vehicle
is
involved
in
a

head
on

collision
See

Fig
K
13

Two
forces
can
be
considered
when
a
collision
of
this

type
takes

place
These

being
the

primary
force
in
which
the

forward
motion
of
the
car
is

suddenly
halted
and
the

secondary

force

as
the
driver
continues
in

a
forward
direction
onto
the

steering
wheel

and
column
The

collapsible
column
is

designed

so
that
it
does
not
move
to
the
rear
i
e
into
the

driving
com

partment
when

the

primary
force
or
forward

motion
of
the
car

is

suddenly
halted
When
the

secondary
force
takes

place
as

the
driver
is
thrown
forward

the
column

jacket
gradually

collapses
and

partially
absorbs
the
amount
of

impact

The

collapsible

type
of
column
is
no
more

susceptible
to

damage
than
an

ordinary
column
when
it

is
installed
in
the

vehicle
however
when
a

collapsible
column

is
removed
it
must

be

carefully
handled
A

sharp
blow
on
the
end
of
the
shaft
or

gear
change
levers

dropping
or

leaning
on

the

assembly
can

cause

the
column

jacket
to
bend

particularly
at
the
bellows

part
which
absorbs
the
shock

The

steering
movement
is
transmitted

by
the

lower
shaft

and

upper
tube
The
lower
shaft
exterior
and

upper
tube

interior
are

tightly
fitted

together
with
four

plastic

pins
com

pletely

eliminating

any
gap

When
a
collision
occurs
the

plastic
pins
shear

and
the
lower

shaft
enters

the

upper
tube
this
action
will
cause
the
shaft
end

to

spread
and
the
lower
shaft
cannot

then
be
withdrawn
unless

an

extremely
high
load
is

applied

The
shaft
is

prevented
from

moving
towards
the
drivers

compartment
when
the

primary
force

takes

place
i

e
when

the
forward
motion
of
the
vehicle
is

suddenly
halted

by
the

three

stoppers
on

the

jacket
tube
The

steering
lock
collar

mounted
to
the
shaft
contacts

the
stoppers
and

prevents
a
rear

ward
movement

A
part
of

the

jacket
tube
is

specially
formed
to
act
as
an

energy
absorbing

part
of
the

collapsible

steering
The

upper

and
lower

guide
tubes

joined
with

polyacetal
resin
are

inserted

into
the
mesh
tube
so
that

energy
generated
by
a

collision
can

be
absorbed
as

smoothly
as

possible
with
a

low
load

The

steering
column

clamp
shown
in

Fig
K
14
is
secured

to

the

jacket
tube
and

body
by
bolts
with
two
aluminium

slidings
blocks
set
to
the

body
by
plastic
pins
An

impact
from

the
drivers
side
causes

the

plastic
pins
to
shear

and
leave
the

sliding
block
in
the
column

clamp
side

allowing
the

clamp
to

move
with
the

jacket
as
it

collapses

COLLAPSffiLE
STEERING
Removal

and

Inspection

Steering
Wheel

I
Disconnect
the

battery
earth
cable

2
Disconnect
the
horn

wiring
and

remove
the
horn

pad
3
Remove
the

steering
wheel
nut

using
the

special
puller

ST

27180000

Eig
K
15
Remove
the
column
shell
covers

Fig
K
16
and
the
turn

signal
switch

assembly

Column
shaft

4
Remove
the
cotter

pin
and
detach
the
shift

rod
Automatic

Transmission
Remove
the
bolt

securing
the
worm
shaft

and

coupling
Fig
K
17

5
Take
out

the
bolts

securing
the
column
tube

flange
to
the

dash

panel
and
the
bolts

securing
the
column

clamp
With

draw
the

steering
column
shaft
towards
the
car
interior

A
careful
check
should

be
made
to
ensure

that
the

assembly

is
not

damaged
in

any
way

Pull
out
the
lower
shaft

tap
the
column

clamp
towards

the

steering
wheel
end
and
remove

the
screws

securing
the

upper
and
lower
tubes

Separate
the

upper
and
lower

tubes

Remove
the

snap
ring
from

the

upper
end
of
the
column

pull

the

upper
jacket
down
and

separate
it
from
the

upper
jacket

tube

Take
care
not
to

damage
the

bearing
Remove
the

plain

washer

and

spring
from
the

upper
shaft

Check
the

column

bearings
for

damage
and
lack
of
smooth

ness

Apply
multi

purpose
grease
to
the

bearing
if

necessary

Inspect
the

jacket
tubes
for

signs
of
deformation
renew
the

tubes
if

necessary
Check
the
dimension

A
in

Fig
K
1B
to

make
SUfe
that

the

jacket
has
not
been
crushed

Check
the

dimension
B

Fig
K
14

COLLAPSffiLE
STEERING

Assembly
and
Installation

Assembly
is
a
reversal
of

the

dismantling
procedure
noting

the

following

points

Lubricate
the
column

bearing
the

spring
and
dust
seal

sliding

parts
Ensure
that
the

upper
shaft

steering
lock
hole
and

the

steering
lock
are

correctly
positioned
Fig
K
19
When

assembling
the
lower
shaft
take
care
to

coincide
the
notch
on

the
universal

joint
with

the

punched
mark
on
the
shaft

Coat
the

upper
and
lower
shaft

serrations
with
multi

purpose

grease
Set
the

steering
in
the

straight
ahead

position
and
fit

the

column
shaft
to

the

steering
gear
See

Fig
K
20
Insert
the

column

through
the
dash
board

and
install
it
to
the

gear
so
that

the

punch
mark
at
the

top
of

the
shaft
is
forced

upwards
Slide

the

universal

joint
to

the

steering
gear
and

temporarily
install

the
column

clamp
6
Fit

the
lower
cover

flange
7
and

tighten

the
column

clamp
bolts

Check
the

steering
wheel

alignment
with
the
wheels
in
the

straight
ahead

position
If
the

steering
wheel

and

steering
lock

are

misaligned
by
more
than
35
mm

I
4
in
from
the
vertical

position
femove

the

steering
wheel
and
re
centre

it

STEERING

LINKAGE
Removal

Jack

up
the
front
of
the

vehicle
and

support
it
on

stands

2
Remove
the

cotterpins
and
castle
nuts

fastening
the
tie
rod

ball

joints
to
the
knuckle
arms

95

ElectrIcal

EquIpment

DESCRIPTION

BATTERY
Maintenance

STARTER
MOTOR

Removal
and

Dismantling

STARTER
MOTOR

Testing

STARTER
MOTOR

Assembly
and
Installation

ALTERNATOR
Removal

Dismantling
and

Inspection

DESCRIPTION

A
12
volt

negative
earth
electrical

system
is
used
in
which

the

battery
is

charged
by
an
alternator
In
the
alternator
a

magnetic
field
is

produced
by
the
rotor

which
consists
of
the

alternator
shaft
field
coil

p
le

pieces
and

slip
rings

Output
current
is

generated
in
the
armature
coils
located

in
the
stator
Six
silicon
diodes
are

incorporated
in
the
alternator

caSing
to

rectify
the

alternating
current

supply
A
voltage

regulator
and

pilot
lamp
relay
are
built
in
the

regulator
box

which

nonnally
does
not

give
trouble
or

require
attention

The
starter
motor
is
a

brush

type
series
wound
motor

in

which

positive
meshing
of
the

pinion
and

ring

gear
teeth
are

secured

by
means
of
an

overrunning
clutch

BATTERY
Maintenance

The

battery
should
be
maintained
in
a
clean
and

dry

condition
at
all
times
or
a
current

leakage
may
occur

between

the
terminals
If

frequent
topping

up
is

required
it
is
an

indication
of

overcharging
or
deterioration
of
the

battery

When

refitting
the
cables
clean
them

thoroughly
and
coat

their

terminals
and
the
terminal

posts
with

petroleum
jelly

Check
the
level
of
the

electrolyte
in
the

battery
at

frequent

intervals
and

top
up
if

necessary
to

the
level
mark
on

the

battery
case
with
distilled
water
A

hydrometer
test
should
be

carried
out

to
determine
the
state

of

charge
of

the

battery
by

measuring
the

specific
gravity
of
the

electrolyte
It
should
be

pointed
out

that
the
addition
of

sulphuric
acid
will
not

normally

be

necessary
and
should

only
be
carried
out

by
an

expert
when

required

The

specific
gravity
of
the

electrolyte
should
be
ascertained

with
the

battery

fully
charged
at
an

electrolyte
temperature
of

200C
680F

The

specific
gravity
of
the

electrolyte
decreases
or
increases

by
0
0007
when
its

temperature
rises
or
falls

by
10C
1
80F

respectively

The

temperature
referred

to
is
that
of
the

electrolyte
and

not
the
ambient

temperature
to
correct
a

reading
for
an
air

temperature
it
will
be

necessary
to

add
0
0035
to
the

reading

for

every
50C
above
200C

Conversely
0
0035
must

be
deducted

for

every
SOC
below
200C
Test
each
cell

separately
and
draw

the

liquid
into
the

hydrometer
several
times
if
a
built
in

thermometer
type
is
used

The
correct

specific
gravity
readings
should
be
as
follows
ALTERNATOR

Assembly
and
Installation

HEAD
LAMPS

Replacing

HORN

INSTRUMENT
PANEL
Removal

WINDSCREEN
WIPERS

WINDSCREEN
WASHERS

IGNITION
SWITCH
AND
STEERING
LOCK

Cold
climates

Temperature
climates

Tropical
climates
Permissible

value

Over
1
22

Over
1
20

Over
1
18
Fully
charged
at
200C

680F

1
28

1

26

1
23

The

battery
should
be

recharged
if
a
low

specific
gravity

reading
is
indicated

Always
disconnect
both
terminals
of
the

battery
when

charging
and
clean
the
terminal

posts
with
a

soda

solution
Remove
the
vent

plugs
and

keep
the
electrolyte

temperature
below
450C
l130F
during
charging

Check
the

specific
gravity
after

charging
and
if
it
is
above

1
260
at

200C
680C
add
distilled
water

STARTER
MOTOR
Removal
and
Dismantling

As
previously
stated
the
starter
motor

is
brush

type
series

wound
motor
in
which
the

positive
meshing
of
the

pinion
and

ring
gear
teeth
are
secured

by
an

overrunning
clutch
The
over

running
clutch

employs
a
shift
lever
to
slide
the

pinion
into

mesh
with
the
flywheel
ring

gear
teeth
when
the
starter
is

operated

When
the
engine
starts
the

pL
lion
is

permitted
to
overrun

the
clutch
and
armature

but
is
held
in
mesh
until
the
shift
lever

is
released
An

exploded
view
of
the
starter

is
shown
in

Fig
M
2

To
remove
the
starter

motor

proceed
as
follows

Disconnect
the

battery
earth
cable

2
Disconnect
the
black
and

yellow
wire
from
the
solenoid

terminal
and
the
black
cable
from
the

battery
terminal

3
Remove
the
two
bolts

securing
the
starter
motor
to
the

clutch

housing
Pull
the
starter
motor

assembly
forwards

and
withdraw

it
from
the
v
hicle

To
dismantle
the
starter

motor
ftrst
remove
the
brush

cover
and
lift
out

the
brushes
as
shown
in

Fig
M
3

Loosen
the
nut

securing
the

connecting
plate
to

the

solenoid
M
terminal
Remove
the
solenoid

retaining
screws

take
out

the
cotter

pin
and
withdraw

the
shift
lever

pin
Remove

the
solenoid

assembly
as
shown
in

Fig
M
4

Remove
the
two

through
bolts

and
rear
cover

assembly

then
remove

the
yoke
assembly
by
lightly
tapping
it
with
a

wooden
mallet

Fig
M
S
Withdraw
the
armature
and
shift

lever

Fig
M
6
Remove
the
pinion

stopper
from
the

armature
shaft

by
removing
the

stopper
washer
pushing
the

109

inter
ill
1

@
fl@

2mm
O
07e7
in

l

r

Fig
M
27

Measuring
the
brush

spring
pressure

oo

fI
f

Fig
M
29
R

h
the

headlamp
Ied
beam

AMM
E
iER
HO
to

SA

HO
N

SWITCH

1

VOLTMETER

115
to
2OV

I
I

Fig
M
31

Testing
and

adjusting
the
horn

114
J

GJ

Fig
M
28

Tightening
the

puUey
nut

HORN
RELAY

L

IBGIGY

tt

t

e

q

HO
N
r

FUSIBLE
LINK
IO
e5
REO
FUS

E
BOX

20A

El
Sl
I

10
STOP
LAMP

SWITCH
HORN
eu
TTON

eATT
RY

Fig
M
JO
Circuit
diagram
for
the
horn

system

Fig
M
32

Adjusting
the
horn
volume
and
tone

ALTERNATOR
Dismantling

Refening
to

Fig
M
16
remove

the

pulley
nut
and
take
off

the

pulley
rim
fan
and

spacer
Withdraw
the
brush
holder

retaining
screws
and
remove
the
brush
holder
cover
Withdraw

the
holder
and
brushes
as
shown
in
Fig
M
17

Slacken
and
remove
the
three

through
bolts
and

separate

the
diode

housing
from
the
drive
end
housing
by
tapping
the

front
bracket

lightly
with
a
wooden
mallet

Fig
M
18

Remove
the
screws
from
the

bearing
retainer
and

separate
the

rotor
from
the
front
cover

Fig
M
19

Remove
the
rear

bearing
from
the
rotor

assembly
with
the

aid
of
a

puller
as
shown
in

Fig
M
2D
Take
off
the
diode
cover

and
unsolder
the
three
stator
coil
lead
wires

from
the
diode

terminal

Remove
the

A
terminal
nut
and
diode
installation
nut
and

remove
the
diode

assembly
Do
not
force

the
diode

assembly

when

removing
or
it

may
be

damaged
Remove
the
stator
from

the
rear
cover

ALTERNATOR

Inspection

Use
an

ohmmeter
as

shown
in
Fig
M
21
to
test

the
rotor

field
coil

Apply
the
tester
between
the

slip
rings
and
check
that

the
resistance
is

approximately
4
4
ohms
at

normal
ambient

temperature
Check
the

conductivity
between

slip
ring
and
rotor

core
as
shown
in

Fig
M
22
if

conductivity
exists
the
field
coil

or

slip
ring
must
be

earthing
and
the
rotor

assembly
should
be

renewed

Cbeck
the
stator
to
ensure
that
there
is

conductivity

retween
the
individual
stator

coil
terminals
as
shown
in

Fig
M

23
If
there
is
no

conductivity
between
the
individual
terminals

the
stator
is
defective

Check
each
lead
wire

including
the
neutral
wire
as
shown

in

Fig
M
24
If
there
is

conductivity
between

any
wire
and
the

stator
COTe

the
stator
core

is

earthing
and
the
stator
must

be

replaced

Diodes

Three

positive
diodes
are
mounted
on
the
positive
plate

and
three

negative
diodes
are
mounted
on
the

negative
plate

The
diodes
allow

current
to
flow
in
one
direction

only
The

diodes
on
the

positive
plate
only
allow
current
to
flow
from

the
terminal
to
the

positive
plate
whilst
the
diodes
on
the

negative
plate
only
allow
current
to
flow
from
the

negative

plate
to
the
terminal
A
diode
which
allows
current
to
flow

in
ooth
directions
or
does
not

allow
current
to
flow
in
the

correct
direction
is
unserviceable
and
all
six
diodes
must
be

replaced
Use
a
tester
as
shown
in
Figs
M
25
and
M26
to
check

each
diode

Brushes

Check
the
movement
of
the
brushes
in
their
holders
The

brushes
should
move

freely
and
can
be
eased
in
necessary
by

carefully
ming
the
sides
Oean
the
brush
holders
before

replacing

the
brushes
Renew
the
brushes
if

they
are
worn
below
a
length

of
7mm
0
275
in
With
the
brush

projecting
approximately

2mm
0
08
in
from
the
holder
it
is
possible
to
measure
the

brush

spring
pressure
using
a

spring
balance
as
shown
in

Fig
M
27

The

pressure
of
a
new
brush
should
be
255
345

grammes

9
0
12
2
oz
the

pressure
will
however
decrease

by
approxi

mately
20

grammes
per
I
amm
0
039

in
of
wear

ALTERNATOR

Assembly
and
Installation

Asssembly
is
a
reversal
of
the

dismantling
prQcedure
noting

the

following
points
The
stator
coil
lead
wires
must
be
resoldered
to
the
diode

assembly
terminal
as

quickly
as

possible
or

the
diodes

may
be

damaged
When

installing
the
diode
A
tenninal
make
sure

that

the

insulating
bushing
and
tube
are

correctly
fitted

The

pulley
nut
should
he

tightened
to
a

torque
reading
of

350
400

kg
cm
301
344Ib
in
Mount
the

assembly
in
a

vice
as
shown
in

Fig
M
28
and
when
the

pulley
is

tightened

make
sure
that
the
deflection
of
the

pulley
groove
does
not

exceed
O
3mm
m
o
118

in

ilEA
D
LAMPS

Replacing

All
weather

type
sealed
beam

headlamp
units
are
fitted
to

the
vehicle
Each

lamp
is
of
the
double
fIlament

type
with
a

full
beam
filament
of
50W
and
a
dipped
beam
filament
of
40W

The

replacement
of
the
sealed
beam
unit
can

be
carried

out
as
follows

Remove
the

wiring
socket
from
the
back
of
the

headlamp

unit
On

Coupe
models
withdraw
the
screws

attaching
the

front

grille
to
the
radiator
core

support
On
all
other
models

remove

the
three

retaining
screws
and
remove
the

headlamp
rim

Withdraw
the
three

retaining
screws

securing
the

retaining

ring
3
in

Fig
M
29
and
remove

the
sealed
beam
unit

When

installing
a
new
sealed
beam
unit
make
sure
that
the

Top
mark
on
the
ring
is

uppennost
when
fitted

HORNS

The
circuit
for

the
horns
is
shown
in

Fig
M
30
The
horns

can
be
adusted
for
v01ume
and
tone
in

the

following
manner

Remove
the
connector

and
the

retaining
nut
in

the
centre

of
the
horn
withdraw
the
horn
from
the
vehicle
Connect
a

voltmeter
and
ammeter

into
circuit
as
shown
in

Fig
M
3I
Set

the
switch
to
ON
and
check
that
the
voltmeter
shows
a

reading
of
12
to
12
5
volts
The
sound
can
be

regulated
by

turning
the

adjusting
screw

Fig
M
32
A

reading
of

2
5

amps

should
be
obtained
for
the
flat

type
of
horns
or
5
0

amps
for

the

spiral
type
of
horns

Turning
the

adjusting
screw
clockwise
will
increase
the

current

turning
anti
clockwise
decreases
the
current

Install
the
horns
in
the
vehicle
and
check
that
the
correct

sound
can
still
be
obtained
when
the

higher
voltage
of
14
15

volts
is

generated
by
the
alternator
Turn
the

adjusting
slightly

if

necessary
then

tighten
the
locknut

INSTRUMENT
PANEL
Removal

The
instrument

panel
holds
the
various
meters

and

indicators
A
printed
circuit
board
is
located
at
the
rear
of
the

panel
and
the
connections
to
it
are

multiple
connectors
When

the

panel
is
remove

the
instruments
are

easily
withdrawn
for

inspection
and

servicing

Disconnect
the

battery
negative
terminal

2
Remove
the
windscreen

wiper
switch

lighting
switch
and

choke
control
knobs

by
pressing
them
in
and

turning

anticlockwise
Remove
the
escutcheon

3
Disconnect
the

cigarette
lighter
cable
at
the
rear
of
the

instrument

panel
and
turn

the

cigarette
lighter
outer
case

so
that
it
can
be
removed

115

ENGINE

Dismantling

Remove

the

engine
from
the
vehicle
as

previously
described

and

carefully
clean
the
exterior

surfaces
The
alternator

distribu

tor

and
starter
motor
should
be
removed
before

washing
Plug

the
carhurettor

air
horn
to

prevent
the

ingress
of

foreign
matter

Place
the

engine
and
transmission
on

the
engine
carrier
ST4797

0000
if

available
and
dismantle
as
follows

Remove
the

gearbox
from
the

engine
Disconnect
the
intake

manifold

water
hose
the
vacuum

hose
and
the
intake
manifold

to
oil

separator
hose
Remove
the
intake
manifold
with
the

carburettor
Fit
the

engine
attachment
ST3720OG18
to
the

cylin

der
block
and

place
tre

engine
on
the
stand
ST371
00000

Remove
the
clutch

@
Ssembly
as
described
in
the
section

CLUTCH
Remove
the
exhaust
manifold
and
heat
baffle

plate

Take
off
the
fan
blades
and
remove
the
water

pump
pulley
and

fan
belt
Remove
the
rocker
cover
hose
manifold
heat
hose
and

by
pass
hoses

Remove
the

generator
bracket
and
the
oil
fIlter
Extract
the

engine
breather

assembly
from
above
Note
that
the
breather

is
fitted
to
the

guide
and
is
installed
with
a
O

ring
which
is

pressed
into
the

cylinder
block

Flatten
the
10ckwasher
and
unscrew
the
crankshaft
pulley

nut
Withdraw
the

pulley
with
the

puller
ST44820000
if
available

but
do
not
hook
it
in
the
V

groove
of
the

pulley

Remove
the
rocker
cover
and
take
off
the
rubber

plug

located
on
the
front
of
the
cylinder
head

Straighten
the
lock

ing
washer
and
remove
the
bolt

securing
the

distributor
drive

gear
and
camshaft

sprocket
to
the
camshaft
Remove
the
drive

gear
and
take
off
the

sprocket
See

Fig
A
3

Remove
the

cylinder
head
bolts
in
reverse

order
to
the

tightening

sequence
sOOwn
in

Fig
A
18
and
lift
off
the

cylinder

head
as
an

assembly
See

Fig
A
4
Note

that
in
addition
to
the

ten

cylinder
head
bolts
there
are
also
two
bolts

securing
the

chain
cover
to

the
head
Invert
the

engine
and
remove
the
oil

sump
Remove
the
chain
cover
and
oil

flinger
Take
off
the
nut

securing
the
oil

pump
sprocket
and
withdraw
the

sprocket
with

the
chain
in

position
as
shown
in

Fig
A5
Remove
the
oil

pump

and
stramer
Note

that
two
of
the

pump
mounting
bolts
are

pipe
guides

Remove
the

timing
chain
crankshaft

sprocket
chain
ten

sioner
and
chain

stop

Remove
the

connecting
rod

caps
and

push
the

piston
and

connecting
rod
assemblies

through
the
tops
of
the
bores

Keep

all

parts
in
order
so

they
can
be
assembled
in
their

original
posi

tions

Take

out
the

flywheel
retaining
bolts
and
withdraw
the

flywheel
Remove
the
main

bearing

caps
but
take
care
not
to

damage
the

pipe
guides
Lift
out

the
crankshaft
and
main
bear

ings
noting
that
the

bearings
must
be
reassembled
in
their

original

positions
Remove
the

piston
rings
with
a
suitable

expander
and

take
off
the

gudgeon
pin
clips
The

piston
should
be
heated
to

a

temperature
of
50
to
600
122
to
1400F
before

extracting

the

gudgeon
pin
Keep
the
dismantled

parts
in
order
so

they

can
be
reassembled
in
their

original
positions

Remove
the
camshaft
rocker
ann
shaft
and
rocker
ann

assemblies
from
the

head

by
taking
off
the
cam

bracket

clamp

ing
nuts
It
is
advisable
to
insert
disused
bolts
in
the
No
1

and

No
5
bracket
holes
as
the
cam
bracket
will
fall
from
the
rocker

ann
shaft
when

it
is
removed
Remove

the
valve

cotters

using

the

special
tool
ST47450000

and
dismantle
the
valve
assemblies
Keep
the

parts
together
so

they
can
be
installed
in
their

original

order

ENGINE

Inspection
and
Overhaul

Cylinder
head
and
valves

Inspection
and
overhaul

procedures
can

be
carried
out

by

following
the
instructions

previously
given
for
the
L14
LI6

and
LIB

engines
noting
the

following
points

Measure
the

joint
face
of
the

cylinder
head

using
a

straight

edge
and
feeler

gauge
The

permissible
amount
of
distortion
is

0
03
mm
0
0012
in
or
less
The
surface
of
the
head
must
be

reground
if
the
maximum
limit
of
0

1
mm

0
0039
in
is

exceeded

Oean
each
valve

by
washing
in
petrol
then

carefully
examine

the
stems
and
heads
Discard

any
valves
with
worn

or

damaged

stems
Use
a

micrometer
to
check
the
diameter
of
the
stems

which
should
be
8
0
mm
0
315
in
for
both
intake
and
exhaust

valves
If

the
seating
face
of
the
valve
is

excessively
burned

damaged
or
distorted
the
valve
must
be
discarded
The
valve

seating
face
and
valve

tip
can
be
refaced
if

necessary
but

only

the
minimum
amount
of
metal
should
be
removed
Check
the

free

length
and
tension
of
each
valve

spring
and

compare
the

figures
obtained
with
those

given
in
Technical
Data
at
the
end

of
this
section
Use
a

square
to
check
the

springs
for
deformation

and

replace
any
spring
with
a
deflection
of
1
6
mm
0
0630
in

or
more

Valve

guides

Measure
the
clearance
between
the
valve

guide
and
valve

stern
The
stem
to

guide
clearance
should

be
0
025
0
055
mm

0
0010
0
0022
in
for
the
intake
valves
and
0
04
0
077
mm

0
0016
0
0030
in
for
the
exhaust
valves
The
maximum
clear

ance

limit
is
0
1
mm
0
0039
in
The
valve

guides
are
held
in

position
with
an
interference
fit
of
0
040
0
069
mm
0
0016

0
0027
in
and
can
be
removed

using
a

press
and
valve

guide

replacer
set
ST49730000
under
2
ton

pressure
This

operation

can

be
carried
out
at
room

temperature
but
will
be
more
effec

tively

performed
at
a

higher
temperature
Valve

guides
are

available
with
oversize
diameters
of
0
2
mm
0
0079
in
The

cylinder
head
guide
bore
must
be
reamed
out
at

normal
room

temperature
and
the
new

guides
pressed
in
after

heating
the

cylinder
head
to
a

temperature
of

approximately
800
C
1760F

The
standard
valve

guide
requires
a
bore
of
14
0
14
018
mm

0
551
0
552

in
and
the
oversize
valve

guide
a
bore
of
14
2

14
218
mm
0
559
0
560
in
Ream
out
the
bore
of
the

guides

to
obtain
the
desired
finish
and
clearance
Use
the
reamer
set

ST49710000
to

ream
the
bore
to
8
000
8
015
mm
0
3150

0
3156
in
The
valve
seat

surface
must

be
concentric
with
the

guide
bore
and
must
be
corrected
if

necessary
using
the
new

valve

guide
as
axis

Valve
seat
inserts

Check
the
valve
seat

inserts
for

signs
of

pitting
The

inserts

cannot
be

replaced
but

may
be
corrected
if

necessary
using
a

valve
seat
cutter

ST49720000

Scrape
the
seat

with
the
450

cutter
then

reduce
the
width
of
the

contacting
faces

using
the

150
and
600
cutters
for
the
intake
valve
inserts
and
150
cutter

for
the
exhaust
valve
inserts
Seat
correction
dimensions
are

shown
in
millimeters
in

Fig
A
6

Lap
each
valve
into
its
seat
after

correcting
the
seat
inserts

Place
a
small

quantity
of
fme

grinding
paste
on

the

seating
face

of
the
valve

and
lap
in
as

previously
described
for
the
Ll4
LI6

and
L
18

engines

S5

between

primary
throttle
valve

and
the
wall
of
the
throttle

chamber
can

be

adjusted
if

necessary
by
carefully

bending
the

choke

connecting
rod
3

THROTILE

VALVE
INTERLOCK
OPENING

With

the

primary
throttle
valve
of
the

type
DAK340

carburettor

opened
to
600
as
shown

in
Fig
B
9
the

adjusting

plate
3
should
contact

the

connecting
lever

J
This

being

the

point
before
the

secondary
throttle
valve
is

brough
into

operation
The

linkage
between

primary
and

secondary
throttles

is

working
correctly
if
the
clearance

G
between

primary
throttle

valve
and
the
wall
of
the
chamber
is
738
mm
0
3937
in

Adjust
if

necessary
by
carefully

bending
the
adjusting

plate
at

point
A
until
the
correct

setting
is
obtained

With
the

primary
throttle
valve
of
the

type
D3034C
car

burettor

opened
at
an

angle
of
500
the

connecting
link
3
in

Fig
B
IO
should
ge
at
the
extreme
left
of
the
slot
in
the
throttle

ann
4
With
the

linkage

positioned
as

shown
measure

the

clearance
between

primary
throttle
valve
and
the
wall
of
the

chamber
as
described
for
the
DAK340

carburettor

Adjustment

can

be
made
if

necessary
by
bending
the

connecting
link
until

the
correct
clearance
is
obtained

CARBURElTOR

Removing
and

Dismantling

The
carburettor
can
be
removed

by
following
the

instruc

tions

previously
given
for
carburettor
removal
on
the
Ll4
L16

and
LIB

engines

Dismantle
the
type
DAK340
carburettor
as
follows

Remove
the

primary
throttle
return

spring
Take
off
the

E

ring
and
remove

the
pump
and

connecting
rod
Remove
the

split
pin
and
choke

connecting
rod
Remove
the

secondary

throttle
return

spring
Remove
the
choke
wire
arm
choke
valve

shaft
and
valve

spring
Take
off
the

clip
and
remove

the
choke

lever
and

spring
To
dismantle
the
float
chamber
take
off
the

diaphragm
cover
and
remove
the

spring
and

diaphragm
Remove
the

diaphragm
chamber
and

gasket
Take
off

the
float
chamber

cover
and
remove
the

gasket
level

gauge
rubber
seal
and
float

Remove
the
screw
from
the
filter
and
withdraw
the

nipple

and
filter
Remove
the

needle
valve
Take
off
the

cylinder

cover

and

pump
cover

and
withdraw
the

piston
piston
return

spring
and
inlet
valve
Remove
the

primary
main
air
bleed
the

secondary
main
air
bleed
and
emulsion
tube
Take

off
the

small
venturi
and
remove
the

primary
and

secondary
slow

jets

and
slow
air
bleeds
Remove
the
drain

plugs
and
take
out
the

primary
and

secondary
main

jets

To
dismantle
the
throttle
chamber
remove
the
throttle

adjusting
screw
and

spring
and
the
idling
adjusting
screw
and

spring
Withdraw
the
throttle
lever

spring
hanger
sleeve

connecting
lever
return

plate
and

adjusting
plate
Withdraw

the

primary
throttle
valve
and

primary
throttle
shaft
Withdraw

the

secondary
throttle
valve
and

secondary
throttle
shaft

The

type
D3034C
carburettor
can
be
dismantled
as
follows

Detach
the

starting
connecting
rod
from
the
choke

lever
and

accelerator

pump
connecting
rod

Remove
the
air
horn

pump
rod
slow

jets
the

primary
and

secondary
small
venturies
Detach
the

primary
and

secondary

linkages
Take
off
the

diaphragm
chambe
cover
and
take
out

the

spring
and

diaphragm
Remove
the

diaphragm
chamber
and

gasket
Separate
the
float
chamber
from
the
throttle
chamber

take
off

the
float
chamber
cover
and
remove
the

components

Remove
the
inlet
strainer
and
float
valve
seat
Remove
the
main

jets
and

take
off
the
fuel

cut
off

valve

CARBURETTOR

Assembly
and
Installation

The

assembly
and
installation
of
the
carburettor
is
a

reversal
of
the

dismantling
and
removal

procedures

Clean
and

inspect
all

components
as
described
for
the

carburettors
fitted
to
the
Ll4
Ll6
and
LI8

engines

TechnIcal
Data

CARBURETIOR
Small
ven
turi

First
7mm

8mm

Carburettor

Type
DAK340
Second
14mm
16mm

Main

jet
02
155

Primary
Secondary
Slow

jet
50
80

Main
air
bleed
60
80

Outlet
diameter
30mm
34mm
Emulsion
hole
0
5
mm
O
5mm

Venturi

diameter
23
mm

29
x
9
mm

Slow
air
bleed

Main

jet
119
165
First
160

Main
air
bleed
220
100

Second
150
220

Slow

jet
48
90

Slow
economizer
1
6
mm

dia

Slow
air
bleed
130
100

Power

jet
50

Slow
economizer
L4mm

Cushion

jet
120

Economizer
bleed
1
2mm

Air

jet
150

Carburettor

Type
D3034C
Power

system
Vacllum

acting

Vacuum

piston
diameter
9
0
mm
0
354
in

Primary

Secondary
Piston

spring
100

gr
0
220
Ibs
31
mm

1
22
in

Bore
30mm
34mm
Power
valve

spring
40

gr
0
0882
lbs
8
6mm

Large
venturi
23mm

28mm
0
34
in

52