1979 DATSUN 210 engine coolant

E
G
R
passage
arid
taibe

I

E
G
R

tube
can
be
removed

by

loosening

securing
nuts

2

Disconnect

blow

by
gas
hose
and

remove

securing
bolts
and

nuts
E

G
R

passage
can

then
be
taken

out

3

Installation
is
in
the

reverse
se

quence
of
removal

EC158A

Fig
EC
S9

Removing
E
G
R

Passage

Note

New

gasket
should

be
used
in

installing
E

G
R

passage

Thermal
vacuum
valve

The
thermal

vacuum
valve
is

made

of

plastic

Consequently
pay
attention

not
to

give
damage
to
it

On
U
s
A

models

except
for

the

FU

model
the
3

port
type
thermal

vacuum

valve
is
located
on
the

rear

end

of
the

cylinder
head

On
Canada
and

FU
mode
the

valve
is

located
on

the
front
end
of
the

cylinder
head
Emission

Corltr
ol

System

I
Drain

engine
coolant
about
one

liter

I
US

qt
Imp
qt

2

Remove
manifold
nut

securing

heat

shield

plate

I
I

LIkat
shield

plate

EC170A

Fig
EC

70

Removing
Heat
Shield

Plate

3
Disconnect
two

vacuum
hoses

and
unscrew
the
thermal
vacuum

valve
The
valve

can
then
be
taken
out

4

Installation
is
in
the

reverse
se

quence
of
removal

Note

a

Be
sure
to

apply
sealer
to
threads
of

the
valve

prior
to

installing
new

wive

b
When

installing
new

thermal
vacu

um
wive
make

sure
it
is

black

t
J

Tightening
torque

Thermal

vacuum
valve

Less
than

2
2

kg
m
16
ft
b

Manifold
nut

1
5
to

2
0

kg
m

11

to
14
ft
b

EC
24
2

port

type

3
port

type

Fig
EC
71

Removing
Thermal

Vacuum
Valve

B
P
T
valve

I

Remove

vacuum
tube
on
the

B
P
T

valve

2

Remove

screws

securing
B
P
T

valve
to

bracket

3
Disconnect
back

pressure
tube

from

B
P
T
valve

The
B
P
T

valve
can
then
be

taken

out

EC770

Fig
EC

72

Removing
B
P

T
S

curing

Screws

4

Installation

is
in

the
reverse
se

quence
of

removal

Note
In

replacing
the
B
P
T

valve

with

new
one
h
that
the

type
number
on

new

part
is
the

same
85
that
on
former

one

INSPECTION

Entire

system

I

Make
a

thorough
vjsual
check
of

E

G
R

control

system
If

necessary

wipe
away
oil
to
facilitate

inspection

If

any
hoses

are
cracked
or

broken

replace

2

With

engine
stopped
inspect

E

G
R

control
valve
for

any
indication

of

binding
or

sticking
by

moving
dia

phragm
of
control
valve

upwards
with

a

finger

3
With

engine
running
inspect

E

G
R

control
valve
and
thermal
vacu

um
valve
for
normal

operation

1
When

engine
coolant

tempera

tun
is
low

Make
sure
that
E

G
R

control
valve

does

not

operate
when

engine
speed
is

increased
from

idling
to
3
000
to

3

500

rpm

Place
a

finger
on
the

diaphragm
of

E
G
R

control
valve
to
check
for
valve

operation

EC773

Fig
EC
73

Checking
E
G
R
Control

2

When

engine
coolant

tempera

tureishigh
Emission
Control

System

Make

sure
that
E
G

R
control
valve

operates
when

engine
speed
is
in

creased
from

idling
to
3
000
to
3
500

rpm
Place

fingers
on
the

diaphragm
of

E

G
R
control
valve
to
check
for
valve

operation

If
E
G

R
control
valve
does

not

operate
check
as
follows

Disconnect
one
end
E

G
R

control

valve
side

of
vacuum
hose
connect

ing
ihermal

vacuum
valve
to

E
G
R

control
valve

Increase

engine
speed
from

idling
to

3
000
to
3

500

rpm

Make
sure
that

thermal
vacuum

valve
is

open
2

port
type
or

closed
3

port
type
and

that
car

buretor
vacuum
is

present
at
the

end
E
G
R

control
valve
side
of

vacuum
hose

If

vacuum
is

weak
or

not

present
at

all

replace
thermal

vacuum
valve
If

vacuum
is

present
check
E
G
R

control
valve
or
B
P

T
valve

If

any
difficulty
is
encountered
in

judging
the
condition
of

any
com

ponent
during
above

inspection
check

the

questionable

component
in

dependently
as
follows

U

S
A

models

Ie

EC160A

Canada
models

ET429

Fig
EC
74

Checking
Vacuum

of

E
G
R
Control
Valve

EC
25
E
G
R
control
valve

Dismount
E
G

R
control
valve

from

engine

I

Apply
vacuum
to
E
G
R
control

valve

referring
to
the

following
figure

If
the
valve
moves
to
full

position
it
is

normal

E

G
R

control
valve
will
remain

open
for
more
than

30
seconds
after

vacuum
has
cut
off

5t
orr

rl

1

1

Fig
EC
75
EC129A

Checking
E
G
R
Control

Valve

2

Visually
check
E
G
R
control

wive
for

damage
wrinkle

or
deforma

tion

3

Clean
the

seating
surface
of

E
G
R
control
valve
with
a

brush
and

compressed
air
and

remove

foreign

matter
from
around
the
valve
and

port

Fig
EC

76

Cleoning
E
G
R
Control

Valve

Thermal
vacuum
valve

3

port
type

Remove
thermal
vacuum
valve
from

engine
Inhale
air

from

port
ofE
G
R

system
and
check
to
be
sure
that

thermal
vacuum
valve

opens
or
closes

in

response
to
its

temperature

Thermal

vacuum
valve

dosing

temperature

Above
50

to
630
C

122
to
1450
F

CAUTION

Do
not
allow
water
to

get
inside
the

thermal
vacuum
valve

EC161A

Fig
EC
77
Ch

c

jng
Th
rmal
Vacuum

Valve

3

port
type

Thermal

vacuum

valve

2

port
type

Dismount
thermal

vacuum
valve

from

engine

Note

Before

dismounting
drain
en

gine
c
oolant
from

engine

Apply
vacuum
to
thermal

vacuum

valve
and

check
to
be
sure

that
ther

SPARK
TIMING

CONTflOL

SYSTE
VI

DESCRIPTION

The

spark

timing
control

system
is

designed
to
control

the
distributor

vacuum
advance

under

varying

driving

conditions
so

as
to
reduce
He
and

NOx
emissions
Emission
Control

System

mal

vacuum
valve

opens
or
closes
in

response
to

engine
coolant

tempera

ture

as

specified

Thermal

vacuum
valve

should

open

at

a

temperature
specified
below

com

pleting
the
vacuum

passage

Thermal

vacuum
valve

opening

temperature

40
to

63
c
104
to
1450

Fl

CAUTION

00

not
allow
water
to

get
inside
the

thermal1
acuum
valve

Jl
i

g

J

eC
42

Fig
EC
78
Ch

ckjng
Thermal
Vacuum

Valve

M
T
model

When

the
transmission

is
shifted

into
the

4th
or
5th

gear
the
electric

current
flows
into

the
vacuum

switch

ing
valve
The
vacuum

switching
valve

is

then
actuated
and

close
the
vacuum

passage
As

a

res
li
the

distributor

fully
advances

its

ignition

liming

When
the
transmission
is

shifted

into

any
gear
other

than
4th
and
5th

current
flow
is

interrupted
The

vacu

umswitclting
valve
is

then
deactuated

and
the

vacuum
leak

passage
is

E026
BoP

T
valve

1

DiSCOIUlect
two
vacuum
hoses

on

BY
T
valve

2

Plug
one
of
two

port
of
BY
T

valve

Apply
a

pressure
above
SO

nimH20

1
97

inHP
to
B
P
T
valve
and

orally
suck
back
other

port
of
B
P
T

valve

as
shown
below

to
check
for

leakage
If

a
leak
is
noted

replace

valve

Apply
pressure
above

SO
mmH10
2
inH10

EC311A

Fig
EC
79

Checking
B
P
T
Valve

opened
This
weakens
the
vacuum

signaUransmitted
from
the
carburetor

As
a
result
the

ignition
timing
of
the

distributor
is

slightly
advanced

On
U
s
A
models

except
for

the

FU
model
a
thermal

vacuum
valve

3

port
type
is
added
on
the

vacuum

line
between
the
carburetor
and
dis

tributor

The
vacuum

signal
is
controlled

by

this
thermal

vacuum
valve

in
accord

ance
with
variation

in

engine
cooling

water

temperature

gear
box

I
Disconnect

a

pair
of
lead
wires

2
Unscrew
the
switch

body
itself

The

switch
can
then
be
taken

out

3

Installation
is
in
the
reverse
se

quence
of
removal

dl
Tightening
torque

Top
cietectingswitch

2
0
to
3
0

kll
m

14
to
22

fHbl

@

EC892

Fig
EC
89

Remouing
Top

Detecting

Switch

Top
detecting
switch

For

AfT
models

The

top
detecting
switch
is

installed

on
the
side
face
of
the

gear
box

I

Disconnect
a
lead
wire

for

top

switch

2

Loosen
switch
itself

Switch
can
then
be
taken
out

Note

When
the

switch
is

remo
ed

automatic

transmission
fluid

flows

out

Prepare
some

rugs
to

prevent
the

fluid
rom

flowing
out

EC169A

Fig
EC
90

Remouing
Top

Detecting

Switch

An
models

3

Insta
tion

is
in

the
reverse
se

quence
of

removal
Emission
Control

System

dl
r

ingtorq

Top
detecting
switch

2
0
to
3
0

kll
m

14

to
22
ft

bl

Thermal
vacuum
valve

3

port
type

The

thermal
vacuum
valve
is
instal

led

on
the
rear
end
of

the

engine

cylinder
head

I

Drain

engine
coolant
about

one

liter

lUllS
qt
Ulmp
qt

2

Remove
manifold

nut

securing

heat
shi
eld

plate

r

l

EC170A

Fig
EC
91

Remouing
Hoot
Shield

Pwte

3
Disconnect
3
vacuum
hoses
and

unscrew
valve

itself
Valve
can
then
be

taken
out

4
Install

thermal

vacuum
valve
in

the

reverse

sequence
of

removal
At

this
time

the
valve
should
be

tighten

ed
to

a
tilt

angle
of
300

Note
Be
sure
to

apply
oealer
to

threads
o
the
valve

prior
to
instal

ling
new

valve
t
J
T1g11taning
torqUe

Thermal

cuum
waive

Less
than

2
2

kll
m
16
ft

bl

Manifold
nut

1
5

to
2

0kg
m

11
to
14
ft

bl

From
distributor

From
B
P
T

valve

From
air
cleaner

ECl71A

Fig
EC

92

mtalling
Thermal
Vacuum

Value
3

port
type

Vacl
ul11

delay
valVe

The
vacuum

delay
Valve
is

installed

on
the

midway
o
the
vacuum
tube

between

the
carburetor
and
distributor

vacuum
advance
mechanism

In

installing
the
valve
make
sure

that
the
brown
face

sid
is
connected

to
the
carburetor

side

Carburetor
sid

C
r

i

J

EG
30
Distributor

side

One
way

umbreDa
valve

Sintered
metal
disc

EC277

Fig
EC
93
In

tolling
Vacuum

Deloy
Value

REMOVAL

It
is
much
easier

to
remove

engine

and
transmission

as
a
single
unit
than

to

remove
alone
After
removal

engine

can
be

separated
from
the
transmission

assembly

WARNING

a
Place
wheel
chocks
in
fronl

of

front

wheels
and
in

rear
of

rear

wheels

b
Be
sure
to
hoist

engine
in
a
safe

manner

c
You
should
not
remove

engine

until
exhaust

system
has
com

pletely
cooled
off

Otherwise

you
may
burn

your

self
and
or
fire

may
break

out
in

fuel
line

Note
Fender
coven
should
be

used

to

protect
car

body

1
Disconnect

battery
ground
cable

from

battery
terminal
and
fusible
link

at
wire

connector

2
Remove
hood

as
follows

CAUTION

Have
an
assistant

help
you
so
as
to

prevent

damage
to

body

I
Mark
hood

hinge
locations
on

hood
to
facilitate
reinstallation

2

Support
hood

by
ltand
and
re

move
bolts

securing
it

to
hood

hinge

being
careful
not
to
let
hood

slip
when

bolts
are

removed
See

Fig
ER
2

3
Remove
hood
from
hood

hinge

f

Il

I

BF133A

Fig
ER
2

Removing
Hood

Remove

under
cover

Drain

radiator
coolant
and

engine
3

4

oil

5

Disconnect

upper
and
lower
hoses

from
radiator
and
disconnect
oil

cooler
hoses
automatic
transmission

only

6
Remove
four
bolts

securing
radia
Engine
Removal
Installation

tor

to

body
and
detach
radiator
after

removing
radiator
shroud

7

Remove
air
cleaner

assembly

from
carburetor
as
follows

1
Remove

fresh
air
duct
from
air

cleaner

2
Remove
hot
air
duct
from
air

cleaner

3

Loosen
air
cleaner
band
bolt

4
Disconnect
air

cleaner
to
air

pump
hose

at
air
cleaner

5

Disconnect
air
cleaner

ta
rocker

cover
hose

at
rocker
cover

6
Disconnect
air

cleaner
to
A
B

valve
hose
at
air

cleaner

7
Disconnect
air
cleaner
to
related

vacuum
hoses
at
air

cleaner

8
Disconnect
accelerator
control

wire
from
carburetor

9
Disconnect

the

following
cables

wires

and
hoses

Wire

to
auto
choke
heater

Wire
to

throttle

opener
cut
solenoid

or

throttle
switch

Wire

to
fuel
cut
solenoid

Wire
to

vacuum
switching
valve

High
tension

cable
between

igni

tion
coil
and
distributor

Battery
cable
to
starter
motor

Wire
to
distributor

Wire

to
thermal
transmitter

Wire

to
alternator

Engine
ground
cable
oil

pressure

switch
and

engine
harness
No
2

See

Fig
ER
3

o

1
Ground
cable

2

Engine
harness
No

2

3
Oil

pressure
switch

Fig
ER

3
EA368

Disconnecting
Cable
and

Wire

Fuel
hose

at
fuel

pump
and
fuel

return

hose
at
connection

Air

pump
air

cleaner
hose

Carbon
canister
hoses

Heater
inlet
and
outlet
hoses
if

so

equipped

ER
3
Vacuum
hose
of

brake
booster
at

intake
manifold

Air
conditioner

equipped

model

10
Remove

compressor
belt

To

remove
loosen
idler

pulley
nut

and

adjusting
bolt

1
Remove
air

pump

2
Remove

compressor
retaining

bolts
and
move

compressor
toward

fender
to
facilitate
removal
of

engine

Nole
Never

discharge
gas
from
com

pressor
while
work
is

being

per

formed

II

Compressor

EA478

Fig
ER
4

Location

of
Air

Compressor

3
Disconnect
vacuum
hose
of
air

conditioner
from
connector
of
intake

manifold

4
Remove

F
i

C
D

actuator
from

bracket

II
Remove
clutch

operating
cylin

der
from
clutch

housing
manual
trans

mission

only

dJ

Tightening
torque

Clutch

operating
cylinder

E
A3

to
clutch

housing

3
1

to
4
1

kg

22
to

30
ft
lbl

Fig
ER
5

Removing
Clutch

Operating

Cylinder

with
the

pin
hole
of
the
internal

rotor

combined
with
the
manual

shaft
and

check
their

alignment
by

inserting
a

1
5
mm
0
059
in
diameter

pin
into

the

holes
If
the

alignment
is

correct

fasten
the
switch

body
with
the
bolts

pull
out
the

pin
tighten
up
the
screw

in

the
hole
and
fasten

the
selector

lever
as
before
Check

the

continuity

pin
with
the
lesler
If

Ihe
malfunc

tion
still
remains

replace
the
inhibitor

switch

STALL
TEST

The

purpose
of
this
test
is
to
check

the
transmission
and

engine
for
trou

ble

by
measuring
the
maximum
num

bers
of
revoiutions
o
the

cngine
while

vehicle
is
held
in

a
stalled

condition

The
carburetor
is
in

fullthrollle

opera

tion
with
the
selector
lever
in

ranges

1
2
and
I

respectively
Com

pale
the
measured

results
with
the

standard

values

Components
to
be
tested
and

test
itelJUl

I

Clutches
brake
and
band
in
trans

mission
for

slipping

2

Torque
converter
for

proper
func

tioning

3

Engine
for
overall

properly

STAU

TEST
PROCEDURES

Before

testing
check
the

engine
oil

and

torque
converter

oil
warm

up
the

engine

cooling
w

ter
to

suitable
tem

perature
by

running
at
1
200

rpm
with

the

selector
lever
in
the

range
P

for

sevcral
minutes

Warm

up
the

torque

converter
oil

to
suitable

temperature

60
to
lOOoC

140
to
2120F

I

Mount
the

engine

tachometer
at
a

location
that

allows

good
visibility

from

the
driver

s
seat
and

put
a
mark

on

specified
revolutions

on
the

meter

2

Secure
the
front
and
rear
wheels

with
chocks

and

apply
the
hand

brake

Be
SIIre

to

depress
the
brake

pedal

firmly
with
the
left
foot
before
de

pressing
the

accelerator

pedal

3
Throw
the

selector
lever
into
the

range
11

4

Slowly

depress
the

accelerator

pedal
until
the

throttle
valvc
is

fully
Automatic

Transmission

opened
Quickly
read
and

record

the

engine
revolution

when
the

engine

begins
to
rotate

steadily
and
then

release
the
accelerator

pedal

5
Shift
the
selector
lever

to
N

and

operate
the

engine
at

approxi

mately
1
200
rpm
for
more
than
one

minute
to
cool

down
the

torque
con

verter
oil
and
coolant

6
Make
similar
staU
tests
in

ranges

2
I
and
R

CAUTION

The

dill
test

operstion
81

specified
in

i18m
4

should
be

I118de
within

fiv

lIeonds

If
it
tBkes
too

long
the

oil

If

and
the
cluti
hn
blllke

and
b
nd

elll

ly
I
Suf

ficient

cooling
time
should

be

given

r

eech
test
for
the
four

IlInges

0
Z
1
end
R

JUDGEMENT

High
stall
revolution

more
than

staitdard
revolution

If
the

engine
levolulion
in

stall

condi
ion
is

higher
than
the
standard

values
it
indicates

that
onc
or
more

clutches
in
the

transmission
are

slipping
and
therefore
no

further
test

is

required

For
the

following
abnormalities

the

respective
causes
are

presumed

High
rpm
in

all

ranges
low
line

pr
ssure

High
rpm
in
0

2
and
I

and

normal

rpm
in
6R

Rear
clutch

slipping

High
rpm
in
D

and
2
and

normal

rpm
in

One

way

clutch

slipping

High
Ipm
in
R

only
Front

clutch
or
low

and
reverse
brake

slipping

To

determine
which
is

slipping

front

clutch
or
low
and
reverse

brake

a
road

test
is

needed

If
while

coasting
after

starting

with
the
levcr
in
I

range
engine

braking
does
not

work

properly
the

low

and
reverse
brake
is

slipping

Otherwise
the
front
clutch
is

slipping

Slipping
of
the
band
brake
is
diffi

cuJt
to
ascertain

However
jf
it

occurs

with

the
lever
in
1

range
engine

AT
41
revolution
increases

up
to
the
same

level

as
in
1st

range
It

is

impossible

to

check
it
in
the

stall
test

2
Standard
stall
rnoluiion

If
the

engine
revoluiion
in

stall

ondition
is
within

he
standard

values
the
control
elements
are

nOf

mally

operating
in

the

ranges
D

2n
I

and
R

Also
the

engine
and
one

way

clutch
of
the

torque
converter
are

norinal
in

performance
and

operation

The

one

way
clutch

of
the

torque

converter

however
sometimes

sticks

This
is
determined

in
the
road

test

3

Lower

stall
revolution
than
lIand

ard

revolution

If

the

engine
revolution
in

stall

condition
is

lower
than
the

standard

values
it

indicates
that
the

engine
is
in

abnormal

condition
or
the

torque
con

verter
s
one

way
clutch
is

slipping

4
O
hers

I
If

the

accelerating
performance

is

poor
until
vehicle

speed
of

approxi

mately
SO

kmfh
30
MPH
is
attained

and
then
normal

beyond
that

speed
it

can
be

judged
that
the

torque
con

verte
c

s
one

way
clutch
is

slipping

2

If
the

torque
converter

sane

way
dutch
sticks

vehicle

speed
can

not

exceed

approximately
80

kmfh

SO
MPH
in
the

road
tesl

In
such

a

case
the

torque
converter

oil
tem

perature
rises

abnormally
and
so

special
care
is

required

3
If
the

transmission
does
not

op

erate

properly
at
all
vehicle

speeds
it

indicates

poor
engine
performance

ROAD

TEST

An

accurate

knowledge
of
the
au
to

matic

transmission
is

required
for
an

exact

diagnosis

II
is

recommended
that
a

diagnosis

guide
chart
with
the
standard

vehicle

speeds
for
each

stage
of

the

up
and

down

shiftings
be

prepared
Measured

vehicle

speeds
are
to

be
filled
in

the

adjoining
column
after
each

testing

Also
it

is
advisable
to

mount

a

stopper
for

positioning
the
throttle

opening

Front
Axle
Front

Suspension

SERVICE
DATA
AND
SPECIFICATIONS

GENERAL
SPECIFICATIONS

COIL

SPRING

Models

equipped
with
air

conditioning
Models
not

equipped
with

air

conditioning

10
5
x
100
x

375

0
413
x
3
94
x
1476

1
62
90
7

Spring
constant
kg
mm

Ib
in
10
8
x

100
x

375

0
425
x
3
94
x
1476

1
65
92
4
Dimension
A
x

C
x

L

AxCxL

Wire
diameter
mm

in
x

Coil
diameter
mm
in
x
Free

length
mm
in

STRUT
ASSEMBLY

Shock
absorber
type

Piston

rod
diameter
mm

in

Piston
diameter
mm
in

Stroke
nun
in

Damping
force
at
0
3
m
1
0
ft
sec

Expansion
kg
Ib

Compression
kg
Ib
Double

acting
hydraulic

20
0
79

30
1
18

164
6
46

30
to
40
66
to
88

17
to
23
37
to

51

STABILIZER
BAR

Bar
diameter

Identification
mark
mm

in
20
0
79

Red

INSPECTION
AND
ADJUSTMENT

WHEEL
ALIGNMENT
Unladen
1

Kingpin
inclination

Turning

angle
of
front
wheel

Inside

Outside
mm
in

degree

degree
0
to
1030

j040
to
3010

1055
t9
3025
2

I
to

3
0
04
to
0

12

6
30
to

13

70
SO
to
9020
Camber

Caster
degree

degree

Toe
in

degree

degree
380
to
420

31
io
to
35
i0

I
Tankful
of
fuel
radiator
coolant
and

engine
oil

Spare
tire

jack
hand
tool
and
mats
in

designed
position

2
For

Wagon
only

FA
13

ILLUMINATION
CONTROL
UNIT
Body
Electrical

System

8

GY
GW

AIMING

ADJUSTMENT

To

adjust
vertical

aim
use

adjusting

screw
on

upper
side
of

headlamp
and

to

adjust
horizontal
ailn

use

adjusting

screw
on
side
of

headlamp
BE1200

Fig
BE

I3
Illumination
Control
Unit

1

Vertical

adjustment

2

Horizontal

adjustment

BE1210

Fig
BE
14

Aiming

Ad
iusting
Screws

Note

Before

makiiIg
headlamp
aim

ing

adjustment
observe

the
follow

ing
instructions

a

Keep
all
tires
inflated
to
correct

pressures

b
Place

car
and
tester
on
one
and

BE
11
same

flat
surface

c
See

that
there
is

no
load
in
car

coolant

engine
oil

fIlled

up
to

correct
level
and
full
fuel
tank

other

than
the
driver
or

equivalent

weight
placed
in

driver
s

position

d

For
details
refer
to
SAE
J599d

When

performing
headlamp
aiming

adjustment
use

an

aiming
machine

aiming
wall
screen
or

headlamp
tester

For

operating
instructions
of

any

almer
it

should
be
in

good
repair

calibrated

and
used

accordi

g
to

respective
operation
manuals

supplied

with
the
unit

If

any
aimer
is

not
available

aiming

adjustment
can
be
done
as

follqws

Turn

headlamp
low
beam
on

H

Horizontal
center
line

of

headlamps

BE297D

Fig
BE
I5

Aiming
Adjustment
Unit

mm
in

Note

a

Adjust
headlamps
so

that

upper

edge
of
hot

spot
is

equal
in

height

to

headlamp
height
and
left

edge
of

hot

spot
is

equal
in

height
to
each

center
line
of

headlamps

b

Dotted
lines
in

illustration
show

center
of

headlamp