Lotus Elan 1970 Workshop Manual

lffil|$

llfiil

Worlshop

Manual

LotLrsi

Gans

Lirnited

Nonwich,

Nonfolk

,

NFl14

AEZ,

England

Telegnarns:

Lotus

,

Nonwich

.

Telext

.974CJ1

I

Port

No

. 36I

327

Morch

1970'C

lffi||$

llf,tf

Worlshop

Manual

LotLrsi

Cans

Lirnited

Nonwich,

Nonfolk

,

NFl14

AEZ,

England

Telegnarnss:

Lotus

,

Nonwich

.

Telext 974CJ1

I

Porf

No

. 36

T 327

Morch

1970'O

NOTE:

Lotus

policy is one of continuous

product

improvement

ond

the

right

is

,"rur,r"t

to

olter specificotions

ot ony

time without prior notice

Whilsr reosonoble efforts

hove

been

mode to

ensure

fhof

ot

the time of

publishing

this monuol

is

correct,

the

descriptions ond

illustrotions

oppeoring ore

not binding.

I

E.

&

O.E.

\

,e

I

\,,

CONTENTS

Technicol

Doto

Chossis

Body

Front Suspension

Reor

Suspension

Engine

Georbox

Hubs, Wheels

ond Tyres

Steering

Brokes

Cooling

S;atem

Fuel

Sptem

Elechicol

Equipment

Lubricofion

ond

Mointenonce

Heofing ond Ventilqfion

Clutch

Finol

Drive

qnd

Propeller

Shoft

Exhoust System

Overhoul

qnd

Rebuild

o

Poge

9

A

B

c

D

E

F

G

H

J

.+a)"

K.

L

M

o

P

a

R

s

X

3

*rtz?

5.

INTRODUCTION

This Workshop

Monuol, which

is in loose-leof

form for

eosy omendment,

hos

been

compiled to

ossist

Lotus

Deolers throughouf

the

world

in the

efficient

repoir ond

mointenonce of the Lotus Elon models.

The vorious

units

ond

systems

of the vehicle ore deolt

with in

sections

which

ore

listed

on

poge

5, eoch

being disfinguished

by

o reference

letter, this letter being

the

some os

is

used in

other

service

publicotions

(i.e.,

A

=

chossis in Ports Lists ond

in the Lobour Schedule). Eoch section

fhus

referred

to opens with

q

contents

poge

so

thot

ony

porticulor

operotion

con

be eosily

locoted.

Service lnformotion

Design

chonges,

producf

improvements

or chonges in

procedure

subsequent

to

the publishing

of this

mqnuol

ore

given

in

Service/Por* Bulletins which ore

issued

regulorly fo

oll outhorised

Lotus Deolers. Should

existing

instructions be offected or

odditionol informotion

be needed,

new poges to this monuol will be issued to Lotus

Deolers

when

convenient.

To ensure the monuol is kept up-to-dote, write the Bulletin number, the

section

ond

poge

number

it

offects

ond the subiecf

motter

in the spoce provided on

poge

8

Technicol Doto

Comprehensive

informotion

regording dimensions, toleronces, weights

ond

torque looding figures

of

oll

nuts

ond

bolts

ore

given

on poge 9

onwords.

Recommended Lubricotion

ond

Mointenonce

Attention

is drown to

Section'O'of this rnonuol for

the

Foctory opproved

recommended lubriconts

ond

ihtervols

of Periodicol Moinfenonce.

Frost Precoutions

Attention

is

drown to the

recommendotions

given

in Secfion'K'

(Cooling

System) of this

monuol

on

fhe

importonce

of

toking

proper precoutions

ogoinst domoge

by

frost.

Point ond Bodv

Protection

Whenwork

is corried

out on

ony

port

of the

cor where

domoge could

be coused

fo the point

ond body, i.e.

working

on

fhe

engine, or removing

the windscreen, it

is

recommended thot

body

protection

covers

be

used.

L-,

6.

to

-t

SECTION CHECK LIST

The number

of

poges in

eoch

section

is

correct ot:- Februory,

1970.

L

1

Section

Description

TECHI.IICAL

DATA

cHASStS

BO DY

FRONT SUSPENSION

REAR SUSPENSION

EN GIN

E

GEARBOX

WHEELS, HUBS

AND

TYRES

STEERING

BRAKING

SYSTEM

COOLING

SYSTEM

FUEL

SYSTEM

ELECTRICAL

EQUIPMENT

LUBRICATION

AND

MAINTENANCE

H

EATING AND

VENTILATION

CLUTCH

FINAL DRIVE

EXHAU

ST SYSTEM

OVERHAUL

AND

REBUILD

Number of

poges

27

8

5l

14

7

41

l8

ll

t5

24

.10

54

n2

l6

6

il

2l

6

l0

t-,

*vn

7.

SERVICE

BULLETIN

RECORD

To

ensure

thof

the informotion

contoined

in

fhe

monuol

is up-to-dote,

Lotus Deolers

-\

cre

osked, when they

receive them, to

record in the columns

below, the

bulletin numbers

\-

with their subiects

ond the

section

ond

poge

number

offected

lf reference is then

mode to these coluinns

before turning

to the

oppropriote section,

it will

be seen

immediotely

if

ony omendment

subsequent

to

fhe

publishing

of

the monuol

t

is

opplicoble.

Bulletin

Number

Dote

Section

Poge

No.

Subiect

.\

\,-/

eF

8.

{'

VEHICLE

IDENTIFICATION.

(Chossis

Numbering)

Commencing

ot

the lst. of

Jonuory

1970,

o

new

formot hos been used

for

Vehicle

ldentificotion.

An exomple

of

o

new chossis

number

is

given below,

together

with

the

full identificotion

Both

chossis ond

body

numbers

being

the

some

Denotes

yeor ond month

of

monufocture

(1

970,

Jonuory)

Denotes

the

production botch

Denotes

ihe chossis

number

E

Denotes

the

model

As

there

ore

ot

present

l6 different model

types,

the

following

codes will

be

used

for

model

ideniificotion .

breokdown.

7001 .010001 E

7001

.

0l

0001

Elon

STD

Elon

STD

Elqn

STD

Elon

SID

Elon

S/E

Elon

S/E

Elon

S/E

Elon

S/E

Elon

Federol

Elon

Federol

Elon

i2'S'

Elon

*2'S'

Elon

+2'S'

Federql

Europo

Federol

NOTE:

Cornmencing

at

1st.

Jonuory

7201

G.Britain

& N.

lrelond

A

Export

B

G .Britoin

& N

.lrelond

C

Export

D

G.

Britcin &

N.lrelond

E

Export

F

G.Britoin

&

N.lrelond

G

Export

H

Export

'J

Export

K

G.

Britoin

&

N.lrelond

L

Exporf

M

Expori

N

G.Britoin

&

N.lrelond

P

Export

O

Export

R

t

Coupe

Convertible

Coupe

Convertible

Coupe

Convertible

U'

1972, fhe'Botch Noi

is no

longer used.

Denoies

yeor

ond month

of

monufocture

(1972,

Jonuory)

Denotes

the

chossis

number

Denotes

the

model

8q.

\*_

Elon

0001

1072.

TECHN

ICAL

DATA

U

INDTX

!"tgftl""

Dimensions

Copocities

Engine:

Generol

Performonce

Cylinder

Hecd

Jqckshqft

Cronkshcft

Flywheel

Connecting

Rod

Gudgeon

(Pision)

Piston

Lubricotion

Fuel

Syaiem:

Pump

Air C

leoner

Corbureit

ers

lgnition

System:

lgnition

Timing

Sporking

Plugs

Distributor

Cooling

Sysfem

Clutch

Georbox:

Becri

ngs

Adiustmeni

Rotios

Speedometer

Geors

Reor

Axle:

Beorings

Adiustment

Overoll

Rcfios

Front

Suspenslon

Steeridg

Reor

Suspension

Brokes

Wheels

&

Tyres

Electrical

Equipmenf:

Bottery

Fuses

Generqior

Storter

Alternstor

Lomp

Bulbs

Additionol

lnformsiion

:

Fuel

Sysiem

Torque

Locding

Figures

-lgg:-

9

l0

't0

l0

1l

12

t2

t3

13

14

r4

14

t4

t5

l6

17

l8

t8

l8

18

rI

r:i.:.

t?

19

20

21

22

23

24

25

8b

r?-

TECHNICAL

DATA

ii

,-__'\

DIMENSIONS

Wheelbose

Trock

(ot

wheel

hub):

Front

Reor

-

Series

l,

2

-

Series

3

onwords

Overoll:

Lengfh

widrh

Height

-

Series

l,

2

-

*"::;:*"""-

Convertible

Ground

cleoronce

(design)

Turning

circle

-

Series

|

,

2, 3

Series

4

Kerb

weight

(unloden):

Series

I.

Series

2

l

Series

3:

84

in.

(213.4

cm.)

47 .O94in.

(l19.6

cm.)

43

"4375

in.

(123

cm.)

47

.06

in.

(l

19.5

cm.)

145 in.

(368.3

cm.)

56

in

.

(142.2

cn.)

45.25

in.

(l

15 cm.)

46.5

in.

(lt8

cm.)

45.5

in.

(115.6

cm.)

6

in.

(15.2

cn.)

29

ft.6

in.

(9

m.)

33

ft.6

in.

(10.2

m.)

l410lbs.

(63e.5

kg.)

1485

lbs

.

(673.5

kg.)

1520

lbs.

(689.5

kg.)

1530

lbs.

(69a

ks.)

1530

lbs.

(694

kg.)

1540

lbs.

(698.s

kg.)

1540

lbs.

(698.5.

kg.)

1550

lbs.

(703

kg.)

1530

lbs.

(694

kg.)

1540

lbs.

(698.5

kg.)

Coupe

-

STD

Coupe

'S/E

Convertible

-

STD

Convertible

-

S/E

Series

4:

Coupe

-

STD

Coupe

-

S/E

Convertible

-

STD

Convertible

-

S/E

L-,)

t4

9.

CAPACITIES

Engine sump

(including

filter)

Georbox

Reor oxle

Coolont

(with

heoter)

Fuef

-

Series

1, 2, 3

-

Series

4

ENGINE

Generol

Number

of

cylinders

Copocity

Stroke

Bore

-

Grode

I

-

Grode

2

-

Grode

3

-

Grode

4

Compression

-

Rotio

-

Pressirre

(ot

seo

level)

Perfonnonce

Mox BHP

@

r.p.m

Mox Torque

@

r.r.t .

Rood speed

per

11000

r.p.m.

in

fop

geor:

7!

pints

(4

litres;

9

US

pints)

l$

pints

(.99

litres, 2.1 US pinfs)

2

pints

(l

.2

litres;

2.4

US

pints)

l4

pinfs

(7.9

litres;

'16.8

US

pints)

l0

golls.

(45

litres;

l2

US

golls.)

9*

golls.

(42

litres;

ll

US

Solls.)

4

95.06

cu.in.

(1558

cc.)

2.864

in.

(72.746

nn.)

3.25N/3.2503

in.

(82

.5s0/82.558

mm.)

3.2503/3.2506

in

.

(82

.558/82.565

mm.)

3.2506/3.2509

in

.

(82

.56s/82.573

mm.)

3.2509/3.2512

in

.

(82

.573/82.580

mm.)

9.5:l

ln excess

of

160 lbs.sq.in.

(11

.248

kg.rq

.cm.)

Eoch

cylinder

within

20

lbs.sq.in

(l

.406

kg.tq

.cm.)

of eoch

other.

105

@

5,500 STD;

108

@

6,000 S/E

108 lbs.fr.

(14.931

ks.m.)

@

4,000

16.50 m.p.h.

(28.55

k.p.h.)

17.62 m.p.h.

(28.35

k.p.h.)

18.10

m.p.h

.

(29.13

k.p.h.)

17

.41

m

.p.h

"

(28.01

k.p.h

.)

18.50 m.p.h

.

(29.77

k.p.h.)

3.90

3.77

3.55

3.77

3.55

I finol

drive

with 5.20

x

13 tyres

I

finol

drive with

145

x

l3 tyres

I finol drive with

145 x

13 tyres

I finol

drive with

155 x

13 tyres

l finol

drive

with

155

x

l3 tyres

I

L-

10.

r+

Cvlinder Heod

Moteriol

Gosket

Cylinder

heod

identificqtion

-

Srnoll

vo!ve

-

Big

volve

Cylinder

heod

dePth

-

Smoll

volve

-

Big

volve

Mox.

permissoblemetot

removol

-

Smoll

volve'

-

Big

volve

Volve

timing

-

Inlet

oPens

Inlet

closes

Exhoust

oPens

Exhoust

closes

Angle

of

volve

seols

ond

foces

Volves:

Heod

diometer

-

Inlet

(except

Sprint)

-

Inlet

(Sprint)

-

Exhoust

Stem

diometer

-

Inlet

-

Exhoust

Stem

cleoronce

in

guide

-

Inlei

-?

it

-

Exhoust

Cleoronce

(cold)

-

Inlet

-

Exhoust

(to

Engine

9951

)

-

Exhoust

(from

Engine

9952)

Volve

sprinqs:

ffi

TyPe

Free

Length

-

lnner

Outer

i

Rote

-

Inner

@

.92

in-

(23.4

mm.)

-

Inner

@

'Sa

in.

(1

4.7

mrm.)

-

Outer

@

t.t7 in.

(29.7

mm')

-

Outer

@

,,83

in .

(21

.I

mm

')

Volve

guides:

'

Internol

cjio.

(to

reom

cfter

fitting)

Aluminium

Copper/osbestos

'S'(&Fed.

Big

volve)

'N'

or

'H'

(

&S/E

Stromberg)

4.638/4.643

in .

(11

.78/11

-79

cm.)

4.s98/4.603

in.

(l

I

.68ll'l

.69

cm.)

.M5

in.

(1

.14

mm.)

.010

in.

(.254

mm.).

220

g.T.D.C.

)

A)

62- A.B

.D

.c.

j

sro,

620

B.B .D

.c.

)

220

A.T.D.c,)

450

1

.526/1.530

in .

(38.760/38.thz

mm.)

1

.560/1.566

in .

(39.624/9.776

mm.)

|

.321/1,325

in .

(33

.553/33

.555

mm.)

.310/.311

in.

(7

.874fr

'899

mm.)

.310/.311

in.

(7.874n-899

mm.)

.00

f

3/.0023

in

.

(.cA7/

.058

mm.)

.0025/

.0030

in.

(

.063/.076

mm

')

.oO5/

.OO7

in.

(.127/

.177

mn.)

"006/.008

in.

(.152/

.203

mm.)

.OW/

.01'l

in,

(

.228/

.279

mm.)

Duol

I

.130

in .

(28

.70

mm

.)

1.450

in.

(36.83

mm.)

12.4

lbs.

(5.6

kg.)

33.5

lbs.

(15.2 kg.)

45 lbs.

(20.a

ks.)

'109

lbs.

(ae.a ks

-)

'!

.31'13/.3123

in.

(7

.932

mm.)

260 B.T.D.C.)

660 A.B.D.c

l

660

B.B.D.C.)

260 A.T.D.c.)

Ei

\-

r-'

:::.

I

1074

Elon

lt.

-\,

Length

-

lnlet

Exhoust

Fitted

height

obove

heod

Volve

guides

Oufside

diorneter

of

guide

-

All

engines:

Stondord

.001

?n

.

(.0254

mm.)

oversize

.005

in .

(.127

mm.)

oversize

.006

in.

(.1524

mm.)

oversize

Diometer

of bore

in

cylinder

heod

-

All

engines:

'

Stondord

:001

in

.

(.0254

mm.)

oversize

.005

in .

{,127

mm.)

ovenize

,006

in.

(.1524

mm.)

oversize

Interference

fit

-

All

guides

-

All

engines:

Volve

seot

inserts

Ouiside

diometer

of

inserf

-

All

engines:

Stondord

.005

in

.

(.127

mm.)

oversize

.010

in

"

(.254

mm.)

oversize

.015

in

.

(.38'l

mm.)

oversiz

e

Dibmeter

of bore

in

cylinder

heod

-

All

engine.s:

Stondord

.005

in

.

(.127

mm.)

oversize

.010

in

.

{.254

mm.)

oversize

.0.|5

in.

(.381

mm.)

oversize

Inierference

fit

-

All

inserts

-All

engines:

Elon

llo

1

.6300/1.63.|0

in.

1

.5050/'l

.5060

in '

(4\.402/41

.427

mm.)

(38.227/38.252 mm.)

1

.6350/1.6360

in

.

I

.5100/l

.5'l

l0 in.

(41

.529/41

.554

mm.)

(38.354/38.379

mm.)

.0025/.0045

in '

(.521/.1l4

mm')

1074

1.520

in.

(38.608

mm.)

'l

.480

in.

(37.592

mm.)

.320

in.

(8.128

mm.)

lnlet &

Exhoust

.5000/.5005

in.

(12.700/12.713

nn.)

.5010/.5015

in.

(12.725/12.738

mm.)

.s050l.5055

in.

(12.827/12.839

mm.)

.5A60/

.s065

in.

(12.852/\2 .865

mm

.)

.499Q/

.4*5

in.

(12.675/12.687

mm.)

.5000/

.5005

in .

(12.700/12 .713

mm.)

.5M0/

.5M5

in.

(12.802/12.814

mm.)

.5050/.5055

in.

(12.827/12.839

mm.)

.0005/.0015

in.

(.0127/.038]

mm.)

ln

let

1

.6235/1

.6245

in.

(41

.237/41

.262

mm.)

1

.6285/1

.6295

in.

{41

.3U/41

.389

mm.)

1

.6335/1.6345

in.

(41

.

491

/41

.51

6

mm

.)

1

.6385i1.6395

in.

(41

.61

8/41

.643

mm.)

| .6200/1.6210

in

.

(41

.l

48/41

.173

mm.

)

1

.6250/1

.6260

in.

(41

.275/41

.300

mm.)

Exh

oust

1

.49e5/1

.4995

in.

(38.%2/38.087

mm.)

1

.5035/1.5(X5

in.

(38.1e9ft8.214

mm.)

I

.508s/l

.5095

in.

(38.31

6/38.214

mm.)

.|.5135/1

.5145

in.

(38.21

4/38.23e

mm.)

1

.4950/1

.496Q

in.

(37

.973/37

.998

mm.)

I

.5000/l

.5010

in.

(38.100/38.'l25mm.)

Comshofts:

Journol

diometer

End

floot

Beorings

-

Number

Com

followers:

Bore in heod

Outside diometer

Follower to

heod cleoronce

Joclchoft

Beorings

-

Number

-

TyP"

-

Lengfh

-

Front

-

Centre

-

Reor

-

Running cleoronce

Journol

diometer

End

floot

-

Typ"

-

Running cleoronce

.0005/

.002

in.

(.013/.050

mm.)

1

.000/1.0005

in.

(25

.4/25.413 mm.)

.003/.Ol

0 in.

(

.076/.254mm.)

5

Steel

bocked,

white metol

1

.375/1

.3756

in.

(34

.92s/34.940 mm

.)

1.3742/1

.3745

in.

(34.9M/34.912

mm.)

.0005/.0014

in.

(.013/.0%

mm.)

3

Steel bocked, white

metol

.75

in.

(19.05

mm.)

.64

in.

(16.26

mm.)

.75

in.

(19.05

mm.)

.001/ .002

in.

(.025/.050

mm.)

1

.560/1.5605

in.

(39

.624/39

.637

nm.)

.002s/ .0075

in.

(.063/.190

mm.)

Crqnlahoft

Bolonce

Within

.2

oz.in.

(14.42

gr.cm.)

Diometer

-

Moin

iournols

2.1255/2.1260

in.

(53

.987/54.000

mm.)

-

Cronkpin

1.9370/l

.9375

in.

(49.199/49.21I

mm.)

End

f

loot

-

Dimension

.003/

.011

in

.

(

.076/ .279

mm.

)

-

Controlled

by Thrust woshers on cenfre moin beoring

Beorings

-

Number 5

-

Type Steel bocked,

leod

bronze with leod

overloy

Running cleoronce

.OiO\s/.0030

in.

(.038/.075

mm.)

Moximum undersize for

regrind

.03

in

.

("762

mm.)

Flywheel

Moximum

runrcut

(loterol)

.004

in.

(.101

mm.)

Storfer

ring

geor

-

Run-out

-

Lolerol

.016

in.

(.406

mm.)

-

Rodiol

.006

in.

(.152

mm.)

12.

r3

ti

Connecting

Rod

Typ"

Moteriol

Distonce

bcfween

centres

Beorings

-

Typ"

-

Running

cleoronce

-

End

floot on

cronkpin

Smoll end

bore

(bushed):

Grode'A'

(silver)

Grode

'B'

(green)

Gudgeon'(Piston)

TyP"

Locotion

Diometer

-

Grode

'A'

-

Grode

'B'

Closs

of

fit

Piston

TyPu

Moteriol

Length

Compression

height

Moximum

permissible

weight voriotion

per

set

Rings

-

Compresion

-

Oil

control

Diometer

-

'A'

type

-

Grode

I

-

Grode

2

-

Grode 3

-

Grode

4

-

'C'

type

-

Grode

I

-

Grode

2

-

Grode 3

-

Grode

4

'H'section

Steel

forging

4

.799/4

.801

i n

.

(t

2

.19/t

2

.24

cn

.)

Steel

bocked,

leod bronze

with

leod overloy

.0005/.0022

in

.

(.01

3/.513

mm .)

.004/.010

in.

(

.l}t/.254

mm.)

.8124/ .8125

in.

(20.635/20.637

mm.)

.8125/

.8127

in

"

(20.637/20.642

mm.)

F

looting

Circlips

.8r21/

.8122

in.

.8122/

.8123

in.

Finger

push

fit

(20.627/20.628

mm.)

(20.628/20.632

mm.)

Solid skirt

Tin-ploied

oluminium

ollov

2.687

in.

(68.250

mm.)

|

.s36/1.538

in

.

(39

.014/39.065

mm.)

4

grommes

2

I

3.2470/3.2473

in.

(82

.474/82.481

mm.)

3.2473/3

.2476

in.

(82

.481/82.489

mm.)

3

"2U6/3

.2479

in

"

(82

.489/82.497

nn.)

3.247e/3.2482

in.

(82

.497/82.504

mm.)

3.2447/3 .2470

in.

(82

.466/82.474

nn.)

3

.2470/3

.2473

in.

(82

.474/82.481

mm.)

3.2473/3

.2476

in.

(82

.481/82.489

mm.)

3.2476/3.247e

in.

(82

.489/82.497

mm.)

t3.

\,

r)

Piston

cfeoronce

in cylinder

borei ,

'A'

type

.0027/.0033

in

.

(.068/.083

mm')

'C'

type

.0030/

-0036

in

.

(.076/.091

mm")

Gudgeon

pin bore offset

.04

in.

(l

.016

mm.)towords

thrust

foce

\-,,,

Ring

gop

(fitted)

-

Compression

.009/.014

in

.

(.229/.356

mm.)

-

O

il control

.010/

.020

in

.

(.

254/

.508

mm ')

Piston

ring

to

groove cleoronce:

Compression

.0016/

.0036

in

.

(.041/

.091

mm ')

O

il

control

. 0018/ .0038

i n

.

(.046/

'097

mn ')

Lubricotion

System

Pump:

Typ.

Eccentric

lobe

Drive

Geor

on

iockshoft

Inner

ond

outer

rotor

cleoronce

.006

in.

(.15

mm.)

Moximum

Inner ond

outer

rotor

floot

.005

in.

(.13

mm.)

Moximum

:'':i;:i":

Outer

rotor

to housing

cleoronce

.010

in .

(.25

mm.)

Moximum

Normol

pressure

(hot)

35/40lbs.in.sq

(2.4/2'8

kg.cm.sq.)

Filter

Full Flow

(renewoble

element

or

'

fh

row-owoy'

con

i

ster)

I

rlii

;;,.

FUEL

SYSTEM

,

Prmp

-

Operoiion

-

Pressure

Air cleoner

type

Corburetfer

-

TyPe ond

number

a,

Slow

running speed

-

Settings:

\-

sTD.

s/E

Choke

36T'm

' F".

Moin

iei

I 15

M

Air corrector

iet

200

150

Slow running

iet

45 F

.9 50

F.8

Accelerotor

pump

iet

40

Accelerotor

pump

stroke

l0 mm.

l0

mm'

Storter oir

iei

100

I00

Storter

petrol

iet

F .5/l0O

F

.5/100

Emulsion

Tube

F.l

I F.l

I

Needle

volve

1 .75

| .75

Air

trumpei

lengih

1.75

in. 1.75

in.

(4.44

cm

.

)

(4

.44

cm.)

Lever

by eccentric

on

iockshoft

1 .25/2.5

lbs.in.sq

.

(.087/.176

ks.cm.sq.)

Poper

element

(dry)

Weber

40 DCOE

18 or, 40 DCOE

31,

Two

800/900

r.p.m.

40 DCOE

l8

,i

t

14.

a,o

u7l

Elon

-

Settings

:

Choke

Moin

iet

Air

coriector

iet

Slow

running

iei

Accelerqtor

pumP

iei

Accelerotor

PUmP

stroke

Storter

oir

iet

Siqrter

peirol

iet

Emulsion

tube

Needle

volve

Air

trumpet

length

Corburetter

-

Type

ond

Number

-

5ettlngs

:

Slow

running

speed

Needle

Spring

Colour

Domper

oil

-

Settings

:

Slow

running

speed

Needle

Spring

Colour

Domper

oil

IGNITION

t/5TElv\

Typu'

Firing

order

No.1

cylinder

lgnition

odvonce

control

lgnition

timing

(stotic)

:

Weber

corbureiters

('A'

pistons)

Weber

corburetters

('C'

pistons)

Weber

corburetfers

(Spri

nt)

Zenith'

Stromberg

corburetfers

(non

Exhoust

Emission)

Zenith

-

Stromberg

corbureiters

(Exhoust

Emission)

Col

I

40

DCOE

3l

I

STD.

30 mm.

lt5

200

50

F.8

40

l0

mm.

r00

s/E

32 mm.

115

r50

50 F.8

40

l0mm.

100

SPRINT

33 mm.

120

155

50 F.8

35

l0

mm.

100

F.s/100

F.ll

1.75

I

.5

in.

3.8 cm.)

25 or

175

CD

2SE,

Two

\_

r .s/100

F .5/100

F .l

1

F.l

I

1

.75

1

.75

I

.5

in.

I

.5

in.

(3.8

cm.)

(3.8

cm.)

Zenith-Stromberg

1

75

CD

.|75

CD

25

(non-Emission)

800/900

r.p.m

.

B .IY

Noturo

I

sAE

20v50

175

CD

25E

(Exhoust

Emission)

950 r.p

.m .

B .IG

B

lue/block

sAE

20v50

"-iG

.'-l-l

.r

/i

'Coil

ond

distributor

|

,3,4,

Neorest

to

rodiotor

Fully

outomotic

l20

B .T.D.C.*

(40953)

100

B

.T

.D

.c ."

(40953)

tzo

B.T.

D .C

.*

(41

189)

90

B.T.D.C."

(40953)

50 B.T.D.C.*

(41225)

Lucos

lA.l2

&

(4r

r

8e)

41

1

8e)

L

15

Sporking

plugs:

TyP"

-

Non

Exhsust

Emission

-

Exhoust

Emission

GoP

-

Non

Exhoust

Emission

-

Exhoust

Emission

*

The

obove

ignition

settings

moY

Distributor

Typ"

-

Non

Exhoust

Emission

-

Exhoust

Emission

Direction

of

rototion

(from

obove)

Drive

Contoci

brecker

goP

Conioct

lever

sPring

tension

Firing

ongles

Com

dwell

ongle

Despoich

No.

-

Weber

corburetters

-

Zenith-Stromberg

corbs.

(Non

Exhoust

Emission)

40953

-

Zenith-Siromberg

corbs.

(Exhoust Emission)

412254

Centrifugol

odvonce

-

Disfributor

Despotch

No

'

40953

ChomPion

N7Y

Aufolite

AG

.32

(for

sustoined

high

speed

driving

use

ChomPion

N7Y)

.020/

.023

in.

('

508/

'584

mm')

.025

in

.

(

.635

mm ')

need

sLIGHT

otteration

fo

rneet

locol

fuel

requiremenis.

23

D

.4

(eorly models

25

D.4)

25

D.4

Anti-clockwise

Geor

on

iockshoft

.014/

.016

in.

(

.35/

.40

mm')

18/24

oz.

(

.51/

-68

ks.)

oo,

9oo,

l8oo,

2loo

!

lo

6oo

1

3o

40953,

STD;

41189A,

5/E

ond

SPrini

\

t

crqlkshoft

r.P.m.

Below

500

.

1,000

I,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

5,500

6,000

6,500

cronkshaft

degrees

B-T.D.C.

(Add

Storic

Seiiings)

No advonce

5.6

10.5

16 .0

16.8

17 R

18.6

19.5

20.5

21 .0

22.5

23.0

24.0

16.

j

M71

Moximum

odvonce

Llon

4-Z

t/

?entrifugol

odvonce

-

Distributor

Despotch No

:il;:

;""

50

sucrion

,."iora cqpsure

fi*ed.

cronkshoft

r.p.m .

Below

.|,000

1,250

1,500

1,750

2,000

2,250

2,54A

-

N'umber of

springs

Clufch ossemb

ly

odiustment

Bore

of

-

Moster

cylinder

-

Slove cylinder

crqnkshoft

degrees B.T

.D.C.(Add

stotic setfing)

No odvonce

2.4

1.6

.

6.8

9.2

1t

.6

14.0

Moximum

odvonce

Borg &

Beck,

diophrogm

spring

Hydrou

lic

8

in.

(20.3

cm.)

6

See Section

'Q'

5/8

in

(15.87

mm

.)

7/8

in.

(22.22

mm

.)

r\

\-cooLrNG

sYsrEM

Moke

ond

Type

Operotion

(-_rDtiu"n

Plote

-

Diometer

Typ"

Cenfrifugol

PumP

ond

fon

Rodiotor cop

relief

volve

pressure

l0lbs.in.sq.

(.70

kg.cm.sq.)

Thermostqf

nominol

opening

temperoture

78oC.

(see

Section

'K')

Fon

belt

tension

(ct

longest

run)

1in.(t2.7mm.)

totol up-cnd-down

movement.

-.

f

mpef

ler vones

to woter

pump housing

cleoronce O2O/ .OgO

in.

(.508/

.762 mm.)

ry

CLUTCH

17.

U

Elon

1472.

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Lotus Elan 1970 Workshop Manual

Lotus Elan 1970 Workshop Manual

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