1969 DATSUN 610 width

The

standard
width
of
the
side

bearings
is
20
0mm

0
7874

this
width
must
be

measured
before

attempting
to

calculate
the
thickness

of
the

adjusting
shims
Use
a

dial

gauge

and
surface

plate
to
ohtain

the
measurement
Place
a

weight
of

approximately
2

5

kg
5
5
lb
on
the

bearing
to

obtain

steady

readings

Install
the
differential

cage

assembly
in

the
carrier

Fit
the

sckcted

shims
and
O

rings
into
both

differential
side

bearing

covers

and
install
the
covers

in
the

carrier

using
the

special
tool

ST
33720000

Fig
G
16
l
Make
sure

that
the
side

bearing

outer

races
are
not

damaged

by
the

roller
Measure
the
backlash

between
the

teeth
of

the
crown
wheel

and
drive

pinion
with
a

dial

gauge
as
shown
in

Fig
G
I
Sct
the
dial

gauge
to
0
10

f
O

mm

0
004
0
008
in

I
If
the

backlash
is

less
than
the

specifIed

value
move
he
left
side

adjusting
shim
to
the

right
side
and
vice

versa

if
the
backlash

exceeds
the
specified
figure

Check

that
the
run
out
at
the
rear

of
the

crownwheel
does

not

excecd
O
OSmm
0
002

in
for

the
1800ce
model
or

O
08mm
0

003
in

for
the
1400
Check
the

drive

pinion

turning

torque
Thc

turning
torque
should
be

higher

by
I
3

kg

em

compared
with
the

turning
torque
obtained
before

fitting

the
differential

cage
in
the
carrier
The

higher
value
can

be

provided
if

necessary
by

dmnging
the

jde
cover

shims
Note

howcver

that
any
decrease
or
increase
in

the
thickncss
of
shims

wjJl

alter
tht
budlush

between
the
teeth
of
the
crownwhee1

and

pinion

Check

the
tooth
contact

pat
tern

of
the
crown
wheel
and

pinion
as

described
under
the

appropriate
heading

DIFFERENTIAL

Installation

Secure
the
differential

carrier
on
the
rear

suspension
mem

ber

using
the
four

bolts
and
washers
Fit
the
differential

mounting
member
to
thc

mounting
holes

by
pushing
it
forwards

with
a

suitable
lever

Fig
G
18

Tighten
the

nuts
to
a

torque

reading
of
8

5

kgm
61
5

Ib
ft

Tighten
the
bolts

attaching
the

gear
carrier
to
the

suspension
member
to
a

torque
reading
of

6
7

kg
36
5Ilb
ft
t

The

rcmainder
of
the
installation

operations
are
a
reversal

of

thc
removal

procedure
Fill
the
differential
with

the
correct

quantity
of
recommended
oil

DIFFERENTIAL
CARRIER

Removal
and

Dismantling

Estate
car
alld
Vanl

To

remove
the
differential

carrier
disconnect
and
remove

rhe

propeller
shaft
as

previously
described

and
remove

the
two

rear
axle

shafts
as

described
in

the
section
REAR
AXLL
With

draw

the
nuts

securing
the
differential

and
remove

the
carrier

from
the
rear
axle

Mount

the
unit
on
the

special
attachment
as
shown
in

Fig
G
19
and

carry
out
a

preliminary
check
before

dismantling

Oleck
the
tooth
contact
of
the

crownwheel

and

pinion
by

applying
lead
oxide

to
three
or
four

teeth
of
the

crownwheel

Turn
the
crown

wheel
several
times

to
obtain
an

impression
of

the

tooth
contact

pattern
Check
the
backlash

between
the
teeth

of
the
crownwheel
and

pinion
with
a

dial

gauge
Hold
the
drive

pinion
with
one

hand
and
move

the
crown
wheel

backwards
and
forwards
to

check

that
the
backlash
is
Io

ithin
thL

speL
ified
limits

Shims
and

adjusting
washers
must
bL
altered
if

the
tooth
con

tact

pattern
and
backlash

is

incorre
L
the
neL

cssary
details
for

these

operations
can
be
found
towards
the

end
of

this
section

under
the

appropriate
he
Jdjn

s
Fil1JJly
mark
the

bearing
caps

with
a
hammer

and

punch
to
ensure
correct

t1ignment
on
re

assembly

Remove
the

bearing

caps
nd
withdraw

the
differ

ntial

cage
make

a
note
of

the
left
and

right
hand

positions
so
h
Jt

the

bearing
caps
and
outer
race
can

be
re

assembled
in

their

original
positions

Withdraw

the
side

beJrings
with
the
s

cjal

puller
as

shown

in

Fig
G
20

taking
care
not
to

catch
the

edge
of
the

bearing

inner
races

Place
the

assembly
in
a
vice
and
detach

the
crownwheel

by
slackening
the

retaining
bolts
in
a

diagonal

patter
Fig
G
lf

Drive

out
th

pinion
shaft
lock

pin
from

left
to

right
using
a

suitable

punch
or

special
tool
ST
23520000

Fig
C
22

With

draw
the

pinion
shaft
and
take
out

the

pinions
side

gears
and

thrust
washers

Store
the

gears
and
thrust
washers
so
that

they

can

be
assembled
in
their

original

positions

Check
the
initial

turning
torque
of
the

drive

pinion
with

the

preload
gauge
ST
3190000

and
measure

the

height
of

the

drive

pinion
with
the

special
gauge
ST
31941000

Compare
the

figures
obtained
with
those

givcn
in

Technical
Data
at

the
end

of
this
section

Hold
the
drive

pinion
with

the

speciaJ
wrench
ST
3
J
530000

as
shown
in

Fig
C

23
and
unscrew
the

drivc

pinion
nut

then

pull
out
the
drive

pjnion
flange

Tap
the
drive

pinion
assembly
to
the
rear
with
a

plastic

mallet
and
withdraw
it

together
with

the
rear

bearing
inner
race

bearing
spacer
and
adjusting
washer

Remove

and
discard
the
oil
seal
and

withdraw
thc
front

bearing
inner
race
Drive
out
the
outer
races

of
the
front
and

rear

bearings
with
a
suitable

drift

Fig
G
25

The
drive

pinion
rear

bearing
inncr
race
can
be
removed

with
the

special
tool
ST
300310000
as

shown
in

Fig
G
24

DIFFE
l
ENTlAL

Inspection

Clean
all

components
thoroughly
and

examine
for

signs

of
wear
or

damage

Check
the
teeth
of
the

crownwhcel

and

pinion
for

scoring

and

hipping
Ii
should
be

noted
that
the
crownwhecl

and

pinion
are

supplied
as
a

matched
set
and
if
either

part
is

damaged

the

complete
set
must
be

replaced

Examine
the

inner
faces
of
the
side

gears
and
seats
on
the

differential
case

Inspect
the

bearing
races
and

rollers
and

replace

them
if

necessary

Small
defects

on
the
faces
of

the
thrust

washers
can
be

corrected

using
emery
cloth
however
if

the
clearance
between

side

gear
and

thrust
washer

exceeds
0
1
O
2mm
0
0039

0
0079

in
it
ill
be

necessary
to

replace
the
washer

Various

sizes
of
washers
are
available

and
the
thicknesses
arc
detailed

under
the

heading
DIFFERENTIA
L

GEAR
CAGE

Assembling

69

greased
Install
the

flange
washer
and

pinion
nut
Tighten
the

nut
to
a

torque
reading
of

14
17

kgm
101
130
Ib
fL
If

the
cotter

pin
hole
is
not

correctly
aligned
a
suitable

washer

should
be
fitted
Do

NOT

adjust
by
overtightening
the

pinion

nul

Van

Lubricate
the
front

bearing
with
oil
and

place
it
in
the

carrier
Grease
the

lip
of
the
oil
seal

and
install
it
to
the
final

drive

housing
Install
the
drive

pinion
the
new

collapsible
spacer

and

the
drive

flange

Fit
the
drive

pinion
nut
and

tighten
temporarily
until
all

slackness
is
eliminated
from
the
front

and
rear
of
the
drive

pinion

NOTE

Ensure
that
oil
and

grease
have
been

completely

removed
from

the
threads
of
the

pinion
gear
the

pinion

nut
and
the
washer

Tighten
the

pinion
nut
and
check

the

preload
with
a

preload

gauge
As
the
nut

is

tightened
to
the

specified
torque

reading
of
13
20

kgm
94
0
144

6Ib
fL

the

preload
must
be

measured
at

every
five
to
ten

degrees
turn
of

the

pinion
nut

As
the

pinion
nut
is

tightened
the

stepped
portion
of
the

spacer

is
deformed
See

Fig
G
29
J
and
the

length
between
the

bearings

adjusted

The
drive

pinion
bearing
preload
with
oil
seal
and
new

bearing
is
7
15

kg
cm
6
1
13
0
lb
in

Turn
the
drive

pinion

to
settle
the

bearing
and
re
check
the

preload
and

tightening

torque
If
the

preload
rate
is
exceeded
it
will
be

necessry
to
fit

a
new

spacer
the
old

spa
cr
cannot
be

reused
and
the
preload

must
not
be

adjusted
by
loosening
the
pinion
nul

Side

bearing

pre
load

adjusting

If

the

original
side

bearings
arc
to
be
used

the
shims
must

be
of
the

same
thickness
as
those

previously
fitted

To
select
shims
for
new

side

bearings
proceed
as
follows

The
standard

width
of
the
side

bearings
is

given
in

Technical
Data
This

width
must

be
measured
before

attempting

to

calculate
the

required
thickness
of
the

adjusting
shims
Place

a

weight
of

approximately
5

kg
5
5
lb
and
of

predetermined

height
onto
the
side

bearing
as
shown

in
Fig
G
30
Mcasure

the

width
of
the

bearing
with
a
dial

gauge
as
illustrated

turning

the

bearing
two
or

three
times

to

gain
an
accurate
meaSurement

Dimensional
variations
from
the
standard
measurements

are
marked
on
the
left

side

bearing
housing
of
the

gear
carrier

on

the

right
side

bearing
housing
of
the

gear
carrier
and
on

the

differential

case
These

variations
are
marked
in

units
of

l
lOOmm

and
are
used
for
the

f
rmula
to

calculate
t1H
thickness
of

the

adjusting
shims
in
the

following
manner

Where
TI

equals
the
left
side

bearing
shim

crownwhecl

side

T2

equals
the

right
side

bearing
shim

pinion
gear
A

equals

the

figure
marked
on

the
left
side

bearing
housing
B

equals
the

figure
marked
on
the

right
side

bearing
housing
C
and
0

equals

the
figure
marked
on

the
differential
case
and

E
and
F
is
the

difference
bctween
the

width
of

the
side

bearings
and
the

standard

bearing
width
H
the

figure
marked
on
the

crownwhcel
Fig
G
31
The
following

formulae
can
now
be
used

to
deter

mine
the

required
shim

thicknessl
s
for

both
side

bearings

I
OOcc
Estate
car

Left

side

bearing
TI
A
C

D
H
x

0
01
0
100
E

Right
side

bearingT2
B
D
H
x

0
01
0
090
F

I800cc

Van

Left
side

bearingTI
A

C
D
H

xO
OI
0
175
E

Right
side

bcaringT2
8
D
H
x
0
01

0
150
F

As
an

example
where
A
1
B
C
2
D
3
E
0
02mm

H
I

The
formula
for
the
left

side

bearing
is

T
I
I
1
3
1

x
0
01

0
175
0
02
0
205mm

1400
and

1600cc
Estate
car

The

required
thickness
of
shim
can
be
found

using
the

following

formula
in

a
similar
manner
to

that

previously
described
for

the
1800cc
models

Left

side

bearing
T
I
A

C
D
E
7

Right
side

bearing
T2
B
D
F

6

Shims
are
available
in
five
thicknesses
of
0
05
0
07
0
10

0
20
and
0
50
mm

0
002
0
0028
0
0039
0
0079
and

0
0197

in

Fit
the
selected
side

bearing
adjusting
shims
on
the

differential

cage
and

press
in
the
side

bearing
inner
races

using

a

suitable
ddfL
nstall
the
differential
cage
into

the
carrier
and

fit
the

bearing

caps
Ensure
that
the
marks
on

the

caps
coincide

with
the
marks
on
the
carrier

Tighten
the

bearing
cap
bolts
to

the

specified
torque
reading
See

Tighte
ing
torques

Measure
the
dimension

between
the
outer

edges
of

the

left

and

right
hand

caps
using
a

large
micrometer
as
shown
in

Fig
G
32
This
dimension
should
be
198
40
198
55
mm

7
8110
7
8169

in
for

the
1400

and
1600
ce
Estate
cars
and

1800
ce

Van
and
173
23
17329
mm
6
8201
6
8244
inl

for

the
1800
cc

Estate
cars

Measure
the
backlash
of
the
crownwhcel
and

pinion
with

a
dial

gauge
The
backlash
must
be

adjusted
to
0
13
0
18
mm

0
005

0
007
in
on

the
1800
CC
models

and
to
0
15
0
20mm

0
006
0
008
in
on
the
1400
and
1600
cc
models

Adjustment

can
be
carried
out

by
moving
side

bearing
shims
from
the

right

hand
side
to
the
left
hand
side
if
the
backlash

is
too

high
or
vice

verca
if
the
backlash
is
too
low

Tighten
the

bearing
cap
bolts

to

the

specified
torque

reading
after

adjusting
Ensure
that
the

run
out
at
the
rear
of
the
crown
wheel

does
not

exceed
O

05mm

0
002
in

Finally
heck
the
tooth
contact

pattern
as
described
below

TOOTH
CONTACT
PATTERN

Checking

The
final
check
on

reassembly
is
an

inspection
of
the

tooth

contact

markings
of

the
crownwhed
and

pinion

Apply
a

coal
of
red
lead
in

oil
to
4
or
5
teeth
of
the
crown

wheel
Turn
the
crownwheel
backwards

and
forwards
several

times
to
obtain
a
clear

impression
of
the
contact
areas

Heel
contact

Fig
G
3
1

71

inter

Q1Ju@
j1l

J

Ikli
l1t
J

T

II
ill

4
LU

I

Il

lJr

I
I

II
Ii

wrllJ
I

l

Y
1iJ

u
r
1

o

77

1
I
l

0
L
J

Dm
hJtl
lllL
l
m
h

t
l
u

c

N

I
Fig
G
29

Measuring
the
clearance
between
the

height
gauge
and

dummy
shaft
3

i
T

O
O
1
L
Th
t
nn

mu
U
J

Fig
G
28
Location
of
the

dummy
shaft
and

drive
pinion
setting
gauge
Fig
G
JO

Measuring
the
width
of
the
side

bearing

under
load

j
Fig
G
32

Measuring
the
dimension
between
left
and

right
hand

bearing
caps
see
text

Fig
G
3
Calculating
the
differential
side

bearing

shims

Af
A

A

HEEL
DRIVE
HEEL
COAST
HEEL
DRIVE
HEEL
COAST

HEEL
DRIVE
HEEL

COAST

SIDE
SIDE
SlOE
SIDE

SIDE
SIDE

Fig
G
33
Heel
contact
Fig
G
34
Toe
contact

Fig
G
35
Flank
contact

TOE
TOE

A
A

HEEL
DRIVE
HEEL
COAST
HEEL
DRIVE
HEEL
COAST

SIDE
SIDE
SIDE
SIDE

Fig
G
36
Face
contact
Fig
G
37
Correct
contact

72

REAR
SHOCK
ABSORBERS

Replacing

Estate
cars
and
Vans

Jack

up
the
reaT
of
the
vehicle
and

place
stands
under
the

rear

axle

housing

Disconnect
the
lower
end
of
the
rear
shock
absorber
from

the

spring
seat

Fig
H
23

Remove
the
shock
absorber

upper
attachment
nuts
and

withdraw
the
shock
absorber
The

upper
attachment
nuts
are

located
behind
the
Tear
seat
backrest
as
shown
in

Fig
H
24
Check
the
shock
absorber
for

leakage
or
cracks
and
make

sure
that

the
shaft
is

straight
Inspect
the
rubber
bushings
for

damage
and
deterioration
Renew
all
defective

components

lnstallation

is
a

reversal
of
the
removal

procedures
Tighten

the

upper
and
lower
shock
absorber
attachment
nuts
to
the

torque
readings
stipulated
in
TIGlITENING

TORQUES

NOTE
The

weight
of
the

vehicle
must
be

resting
on
the
fear

wheels
when

tightening
the
lower

mounting
to

damp
the
rubber

bushes
in
an
unloaded

position

TechnICal
Data

I
Type
Independent
suspension
with
semi
tralllI1g
arms
or

semi

floating

COIL
SPRINGS

14
2mm
0
559
in

14
5mm
0
571
in

90
mm
3
543
in

306
mm

12
047
in

299
mm
II
772
in

290
mm

11417
in

I
1400
and
1600cc

Wire
diameter

Wire
diameter
hard

suspension

Coil
diameter

Free

length
R
H

Free

length
L
H

Free

length
Hard

suspension

1800cc

Wire
diameter

Coil
diameter

Free

length
RHD
R
H

Free

length
RHD
L
H

Free

length
LHD
both

Free

length
Hard

suspension

RHD
R
H

RHD
L
H

LHD
both
14
5
mm

0
571
in

90
3
54
in

321
mm

12
6
in

307
mm

12
1
in

321
mm

12
6
in

306
mm

12
0

in

299
mm

I
1
8
in

306
mm

12
0
in

SHOCK
ABSORBERS

34
56

kg
75
123
lb

21
39

kg
46
86
lb

SHOCK
ABSORBERS

Estate
cars
and
Vans

1400
and
1600cc
estate
cars
and

rigid
axle
sedan

Piston
diameter
2S
mm
0
984
in

Stroke
205
mm

8
071
in

Max

length
518
mm
20
39
in

Damping
force
at
0
3
in
see

Estate
cars

Expansion

Compression

Damping
force

at
0
3m
jsec

Sedan

Expansion

Compression
1400
and
1600
cc

Piston
diameter

Piston
diameter
Hard

suspension

Stroke

Max

length

Damping
force
at
0
3m
sec

Expansion

Compression

1800
cc

Stroke

Max
lengtb

Damping
force
at
0
3
m
sec

Expansion

Compression

82
35
mm
1
378
in

40
mm

1
575
in

206
mm
8
110
in

568
mm
22
362
in

45

kg
99
21b

28

kg
61
7
lb

220
mm
8
60
in

595
mm
23
4
in

90

kg
198
4
lb

50

kg
110
3
lb

75

kg
165
4Ib

40

kg
88
2

lb
1800cc
Estate
cars

Stroke

Max

length

Damping
force
at
O
3m
sec

Estate
cars

Expansion

Compression
205mm
8
071
in

518
mm
20
39
in

63
87

kg
139
192
lb

33
43

kg
73
95
lb

Damping
force
at
0
3
m
sec

Estate
car
and
Van
with
hard

suspension

Expansion

Compression
97
131

kg
214
289
lb

29
43

kg
64
95
lb

REAR
SPRINGS

1400
and
1600cc
Estate
car

Length

Width

Thickness

No
of
leaves

Free
camber

Laden
camber
1200mm
47
2
in

60
mm
f2
362
in

6
mm
0
236
in

4

137
mm
5
394
in

15
mm

265
kg
0
59
in

584
lb

Spring
eye
bolt
diameter

Front

Rear
45
mm

I
772
in

30

mm
U81
in

1400
and
1600
cc

Free
camber

Laden
cam
her
rigid
axle
sedan

100
mm
3
937
in

15mm
250

kg
0
591
in

551

lb

1800cc
Estate

Laden
camber

Turning
torque
15
mm

265
kg
0
591

in
1

584
lb

2
2
kg
mm

123
Ib
in

REAR
AXLE
SHAFT

less
than
4
5

kg
cm
3
91b

in

less
than
0
1

S
mm

0
006
in

DRIVE
SHAFT
AND
JOURNAL
Spring
constant

End

play

Sliding
resistance
1400
and

1600
cc

Sliding
resistance
1800cc
0
15

kg
0
33
lib

less
than
20

kg
44
lb

Radial

play
of
ball

spline
less
than
O
lmm
0
004
in

BRAKE
PEDAL
ADJUSTMENT

The

brake
pedal
height
and
free

play
can
be

adjusted
in

the

following
manner
1400
and
1600
CC
models

Adjust
the

length
of

the
master

cylinder
push
rod
until
the

height
of
the

pedal
pad
is
187
mm
7
36
in

for
manual

gear

boxes
and
202
mm
7
95in
for

automatic
transmission
vehicles

without
brake

light
switch

Fig
L

31

Retighten
the
locknut

Screw
in

the
brake
light
switch
until
the
screwed

part
of
the

switch
is

against
the
front
of
the

stopper
bracket
then

tighten

the
locknut

Screw
in
the

stopper
bolt
until
the
moveable

part
of
the

switch
is

completely
pushed
in

by
the

pedal
and

tighten
the

locknut
in
this

position
Make
sure

that
the

lamp
is
00

when
the

pedal
is

pushed
down

by
1
5mm
0
06
in

1800cc
models

Adjust
the
bolt
of
the
brake

lamp
switch
until
its
end
face

is
flush
with
the
locknut
then

tighten
the
locknut

securely

See

Fig
L
32

Adjust
the

pedal
stopper
until

the

pedal
pad
is

positioned
at
a

height
of
185
mrn

7
28
in
from
the
floor

then

tighten
the

stopper
with
the
locknut

Adjust
the

length

of

the
master

cylinder

push
rod
until
a

pedal
free

play
of
I
5mm

0
04
D
2in
is
obtained
then

retighten
the
locknut

Depress
the
brake

pedal
several
times
to
make
sure
that
a

full
travel
of
145mm
5
7
in
is
available
and
that

the
pedal

moves

freely
and
without
noise

Technical
Data

BRAKE
PEDAL

Pedal

height

1400
and
1600cc
models
I
87mm

7
362in
manual

gearbox

202mm
7
953in
auto

matic

185mm

7
28in

145mm
5
71
in
1800cc
models

Full
stroke

MASTER
CYUNDER

Inner
diameter

Piston

running
clearance
19
05mm
0
75
in

0
15mm
0
006
in

WHEEL
BRAKE
CYLINDERS

Inner
diameter

1400
and
1600cc

Front
drum

Front
disc

Rear
with
front
drum

Rear
with
front
disc
22
22mm
7
8in

50
8mm

2
0

in

22
22mm

7
8in

20

64mm
13
16
in

Inner
diameter
I
BOOcc

Front
drum

20
6mm

13
16in
Front

disc

Rear
50
8mm
2

0in

22
2mm
7
8
in

BRAKE
DRUM
AND
BRAKE
DISC

Drum
inner
diameter

Drum
outer
diameter

Out
of
round
maximum

Repair
limit
of
drum

Maximum
disc
run
out

Repair
limit
of
disc
228
6mm
9
0in

232mm
9
13in

0
05mm
0
002

in

230mm
9
055
in

0
06mm
0
0024
in

8
4mm
0
331
in

BRAKE
UNINGS

Drum
brakes

Width
x

thickness
x

length
40
x
4
5
x
219
5mm

1
575
x
1
772
x
8
642in

Disc
brakes
39
7
x
9
x
86mm

1
563
x
0
354
x

3
386in

Total

braking
area

Front
drum
brake

Front
disc
brake

Rear
351

sq
cn
54
4

sq
in

114
2

sq
cm

17
7

sq
in

351

sq
cm
54
4

sq
in

107

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

4

Cylinder
head

gasket

Cylinder
block
side
6
Oil

pump

5
Intake
manifold
Block

installing
surface

near
to

oil
exit

Control
valve

Angle
tube
connector
7
Rocker
cover

Tapping
screw
of
bume

plate
installing

SPECIFICATION

a
Valve

mechanism

Valve
clearance
cold
In
0
25
mm
0
0098
in

Ex
0
25
mm
0
0098
in

Hot
Reference
value
0
0098
in

In
0
28
mm
0
011
in

Ex
0
28
mm
0
011
in

Valve
head
diameter
In
42mm
1
654
in

Ex
35mm
1
378
in

Valve
stem
diameter
In
Ex
8mm
0
3150

in

Valve

length
In
116
4
mm
4
58
in

Ex
117
2
mm
4

61
in

Valve
lift
9
0mm
0
354
in

Valve

spring
free

length
Outer
42
5
mm
1
673
in

Inner
414mm
1
630

in

Valve

spring
loaded

length
Outer
29
0
mm
I
142
in

Inner
26
0
mm
1
024

in

Valve

spring
assembling
height
Outer
37
0mm
I
457

in

Inner
34
0
mm
1
339
in

Valve

spring
effective
wind
number
Outer
4
5mm
0
1772
in

Inner
6
25
mm
0
2461
in

Valve

spring
wire
diameter
Outer
4
2mm
0
1654
in

Inner
29mm
0
1142
in

Valve

spring
coil
diameter
Outer
27
5
mm
1
083
in

Inner
19
9mm
0
733

in

Valve

guide
length
In
48mm
1
890
in

Ex
60mm
2
362
in

Valve

guide
height
from
cylinder
head
In
Ex
16
7mm
0
657
in

Valve

guide
inner
diameter
In
Ex
7mm
0
2756
in

Valve

guide
outer

diameter
In
Ex
14
2mm
0
559
in

Valve

guide
to
stem
clearance
In
0
025
0
055

mm

0
0010
0
0022
in

Ex
0
04
0
077
mm

0
0016
0
0030
in

Valve

guide
interference
fit
In
Ex
0
040
0
069
mm

0
0016
0
0027
in

Max
tolerance
of
above
clearance
In
Ex
0

1
mm
0
0049
in

Valve
seat
width
In
Ex
2
05
2
33mm

0
0807
0
0917
in

Valve
seat

angle
In
Ex
900

b
Camshaft
and

timing
chain

Camshaft
end

play
0
07
0
148
mm

0
0028
0
0058
in

Cam

height
36
53
mm
1
438
in

Camshaft

journal
diameter
37
45
37
475
mm

1
474

1
475
in

S14

Brake

pedal

Pedal
free

height

Full
stroke
of

pedal
head

Master

cylinder

Inner
dia
of
master

cylinder

with
Master
vac

without
Master
vac

Allowable
max
clearance

between

cylinder
wall
and

piston

Wheel

cylinder

Inner
dia
of
wheel

cylinder

Front

Rear

Allowable
max
clearance

between

cylinder
wall
and

piston

Brake
drum
and
rotor

Rear
brake
drum
inner
dia

Front
brake
rotor
outer
dia
Technical
Data

Drum

inside
out
of
roundness
below
0
05

mm
0
002
in

Limit
of

reconditioning
drum

in
dia

Run
out
of
the
rotor

Limit
of

reconditioning
rotor

in
thickness
183
mm
7
2
in

150
4
mm
5
9
0
158
in

22
22
mm
7
8
in

19
05
mm

3
4
in
Lining
dimension

Front
width
x

thickness
x

length

0
13
mm
0
0051
in

Rear
width
x

thickness
x

length

50
8
mm
2
in

20
64
mm

13
16
in
Material

Pad
width
x
thickness
x

length

0
18
mm
0
0709
in
Pad

material

228
6
mm

9
in

232
mm
9
130
in
Total

braking
area

Front

Rear
229
6
mm
9
039
in

below
0
06
mm

0
0024
in

8
4
mm
0
331
in

40
x
4
5
x
219
5
mm
1
575
x

1
772
x

8
642
in

40
x

4
5
x

219
5
mm

1
575
x

1
772
x
8
642
in

D233

397
x

9
x
86
mm
1
563
x
0
354

x
3
386
in

standard
M78S

option
Sl6D

114
2
em2

17
7
in
2

351
em2
54
4in
2

835