1969 DATSUN 610 Workshop Manual

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P

15

TIghtenIng
Torques

LIB

engines
Three

speed
geabox
ENGINE

2
5
4
0

kgm
18
29
Ib
ft

0
3
0
4

kgm
8
13
IbJI

Ll
1
8

kgm
8
0
12
llbJt

1
6
2

5
kgm
12
18Ib
ft

I
I
1
8

kgm
8
0
12
llbJt

0
7
I
I

kgm
5
1
8
0

IbJt

17
2

lkgm
l2
15IbJI

7
0
12
0

kgm
51

87IbJI

0
8
1
0

kgm
5
8
7
2
IbJI

0
3
0
4

kgm
2
2
2
9Ib
ft

2
3

kgm
14
22IbJI

J
9
2
2

kgm
14
16IbJI
Gearbox
to

engine

Dust
cover

Front
cover

Rear
extension

Bottom
cover

Reverse
idler
shaft

Detent
ball

plug

Mainshaft
nut

Mainshaft

bearing
retainer

Speedometer
pinion
sleeve

lock

plate

Reverse

lamp
switch

Control
lever
nut
Cylinder
head
bolts

1st

stage

2nd
stage

3rd

slage
4
0

kgm
28
9Ib
ft

6
0

kgm
43
4lb
ft

6
5
8
5

kgm
47
0
61
5

Ib
ft

Connecting
rod

big
end
nuts

Ll4
Ll8

engines

Ll6

engine

Flywheel
bolls

Main

bearing
cap
bolts

Camshaft

sprocket
bolt
4
5
5
5

kgm
33
40
Ib
fl

3
2
3
8

kgm
23
27
lb
ft

14
16

kgm
l01
106Ib
ft

4
5
5
5

kgm
33
40Ib
ft

12
16

kgm
86
8
116IbJt

0
6
0
9

kgm
4
3
6

5IbJt

I
I
1
5

kgm
8
0
10
8

Ib
fl

2
3

kgm
14
5
21
7Ib
ft

5
6

kgm
36
43
Ib
ft

0
6
0
9

kgm
4
3
6
5
Ib

ft

12

16kgm
86
8
115
7

IbJt
LIB

engines
Four

speed
gearbox
Oil

sump
bolts

Oil

pump
bolts

Oil
drain

plug

Rocker

pivot
locknuts

Camshaft

locating
plate
bolts
2
5
4
0

kgm
18
29

IbJt

0
8
1
0

kgm
5
8
7
2Ib
ft

Ll
l

7kgm
8
12IbJt

Ll
I

7kgm
8
12Ib
ft

3
3
44

kgm
24
32IbJI

1
7
2
1

kgm
12
15

IbJt

2
3

kgm
14
22Ib
ft

0
5
0
7

kgm
3
6
5
IlbJI

0
8
I
I

kgm
5
8
8
0Ib
ft

0
8
Ll

kgm
5
8
8
01b
ft

0
8
1
0

kgm
5
8
7
2Ib
ft
Gearbox
to

engine

Dust
cover

Front
cover

Bottom
cover

Rear
extension

Detent
ball

plug

Reverse

lamp
switch

Lower
bracket
bolt

Shift
rod
nut

Cross
shaft
bracket
bolt

Gear

change
lever

mounting
bolt
Crankshaft

pulley
nut

Outch

mounting
bolts

L14
Ll6

Ll8
2
4
2

6kgm
174
18
8

Ib
ft

1
6
2
2

kgm
12
16Ib
fl

PROPELLER
SHAFf
AND
DIFFERENTIAL

GEARBOX

17

20kgm
l22
145IbJI

14
17

kgm
101
123Ib
ft

13
20

kgm
94
145Ib
fI
Drive
pinion
nuts
Saloon

Drive

pinion
nuts

Estate
car

Drive

pinion
nuts
Van
Ll4
and
L16

engines
Three

speed
Gearbox

Rear
extension
to
case

bolts
2
8
4
4

kgm
20
32lb
ft

Gearbox
10

engine
2
5
4
0

kgm
18
29Ib
fI

Bnttom
cover
L1
1
7

kgm
8
0
12
3
lb

ft

Ll
1
7

kgm
8
0
12
3
lb

fl

3
5
5
0

kgm
25
3
36
2

Ib
ft

1
8
2
1

kgm
13
0
15
2

Ib
ft

2
4

kgm
14
5
29
Ib
ft

0
7
L1

kgm
5
1
8
0
lb

ft

0
7
Ll

kgm
5
1
8
0
lb

fl

9
11

kgm
65
1
79

51b
ft
Crown
wheel
bolts

1400
and
1600

cc
Saloon

1400
and
1600
cc
Eslale

1800ce
Saloon

I800cc
Estate

1800cc
Van
7
8

kgm
51
58Ib
ft

4
8
5
5

kgm
35
40
Ib
ft

7
8

kgm
51
58Ib
ft

7
8

kgm
51
58Ib
ft

4
8
5
5

kgm
35
40
Ib
ft

0
9
1
2

kgm
6
5
8
7Ib
ft

1
9
2
6

kgm
13
7
18
8

IbJI

1
9
2
6

kgm
13
7
18
8

Ib
f
Front
cover

Drain

plug

Selector
lever
bolts

Side
retainer
bolts
Saloon

Drive

flange
bolts
Saloon

Reverse

lamp
switch

Idler
shaft

screw

Rear
cover
bolts

Cross
shaft
lock

pin

Final
drive
to

mounting
member

1400
and
1600cc
models
6
8

kgm
43
4
57
8IbJI

1800cc
models
5
7

kgm
36
2
50
6Ib
fI

Final
drive
to

suspension
member
6
7

kgm
43
4
51
0
Ib
ft

Final
drive
to
drive
shafls
5
6

kgm
36
431b
ft

Final
drive

flange
to

propeller
shaft
1
6
2
4

kgm
12
17
Ib
ft

Final
drive

flange
to

propeller

shaft
Eslale
1
6
2
4

kgm
l2
17Ib
ft

Mainshafl
locknut

Ll4
and
L16

engines
Four

speed
gearbox

Rearexlension
to
case

bolts
1
6
2
5

kgm
12
18Ib
ft

Gearbox
to

engine
2
5
4
0

kgm
18
29Ib
ft

Bottnm
cnver

L1
1
8

kgm
8
13
Ib
ft

Fronl
cover
L1
1
8

kgm
8
13
IbJI

Drain

plug
3
5
5
0

kgm
25
3
36
2

Ib
f

2
4

kgm
14
5
28
9IbJt

9
11

kgm
65
1
79
5Ib
ft
Final
drive

flange
to

propeller

shaft

l800cc
610

only
Reverse

lamp
switch

Mainshaft
nut
2
0
2
7

kgm
14
5
19
5
lb

ft

4
6

kgm
29
43
Ib
ft

Oil
drain
and
flller

plug
Saloon

129

REAR
AXLE
AND
REAR
SUSPENSION

Rear
wheel

bearing
nut

Brake

backplate
25
33

kgm
181
239

IbJt

7

3
7

kgm
19
5
26
8

lb

ft

1400
1600
Shock
absorber

upper
mounting
3

kgm
l6
61b
ft

Shock
absorber
lower

mounting
3

kgm
16
6
Ih
ft

1800cc
Shock
absorber

mountings
1
6
2
2

kgm
12
161b
ft

Drive
shaft
to
differential
nuts
5
6

kgm
36
2
4341b
ft

Drive
shaft
to
rear
axle

flange
5
6

kgm
36
2
43
4lb
ft

Bump
rubber
nuts
2
8
4
0

kgm
20
29
Ib

ft

Bump
rubber
nuts

180Occ
1
6
2
2

kgm
12
16
Ib
ft

Wheel
nuts

Rear

suspension
member

mounting
nuts
8
9

kgm
58
651b
ft

10

kgm
72
Ib
ft

Differential
member

mounting
nuts
8
5

kgm
61
5Ib
ft

Suspension
arm
to

suspension
member
nuts
10

kgm
58
72
Ib
ft

Differential
to
differential

member
6
8

kgm
43
581b

fl

Propeller
shaft

flange
nuts
4
0
8
5

kgm
29
62
Ib
ft

Propeller
shaft

flange
nuts

I
800cc
2
0
2
7

kgm
14
201b

fl

Differential
to

suspension
member
6
8

kgm
43
58Ib
ft

1800cc
Estate
car
and
Van
610

Body

Shock
absorber

upper
mounting
0
9
1
2

kgm
6
5
8
7Ih

fl

Shock
absorber
lower

mounting
3
5
4
5

kgm
25
33Ib
ft

Rear

spring
U
bolt

clip
6
0
6
5

kgm
43
47
Ib
ft

Shackle

spring
6
0
6
5

kgm
43
47Ib
ft

Spring
front

pin
6
0
6
5

kgm
43
47Ib
ft

Brake
back

plate

Estate

car

Van

Differential

gear
carrier

to
axle
case

Propeller
shaft

flange

Bump
rubber

Wheel
nut

Drain
and
filler

plug
2
2
2
7

kgm
16
20IbJt

L5
2
0

kgm
II
14
Ib
ft

2
0
2
5

kgm
14
18Ib
ft

2
0
2

7kgm
14
20Ib
ft

0
9
1
2

kgm
6
5
8

7Ib
ft

9

kgm
58
65Ib
ft

4
2
6
9

kgm
30
4
49
9
lb

ft

FRONT
SUSPENSION

Front
hub
nut

3
0
3
5

kgm
21
7
25
3

Ib
ft

Disc
brake

backplate
to
strut
2
7
3
7

kgm
19
5
26
7

Ib
ft

Brake

ca1liper
bolts
7
3
9
9

kgm
52
8
71
6

Ib
ft

Brake
disc
bolts
3
9
5
3

kgm
28
381b
ft

Stabilizer
bolts

suspension

arm
side
1
2
I

7kgm
8
7
12
3

Ib
ft

130
Tension

rod
to
frame

Tension

rod
to

transverse
link

Strut

assembly
upper
nuts

Steering
lever
to

strut

Ball

joint
to

transverse
link

Ball

joint
to
knuckle
ann

Piston

rod
nut

Gland

packing

1400
and
1600
CC
models

Flange

mounting
bolts

Bali
stud
nut

Gear
ann
nut

Idler
ann
nut

Adjusting
screw
nut

Steering
gear
mounting
bolts

Idler
arm

bolts

1800cc

models
610

Body

Gear
ann
nut

Rear
cover

bolts

Sector
shaft
cover

Sector
shaft

adjusting
screw

locknut

Steering
gear
mounting
bolts

Steering
linkage

Idler
arm
to
frame

Ball
stud
nuts

Side
rod
locknuts

Column
shaft

Steering
wheel
nut

Column

clamp

COll

piing
worm
shaft

Coupling

mounting
bolts

Brake

pedal
pivot

Brake

pipe
connection

Brake
disc
bolts

Bridge
pipe

Brake
hose
to

cylinder

Brake
calliper
bolts

Wheel

cylinder
bolts

Stud
side

Hexagon
side
4

5
5
5

kgm
33
40Ib
ft

4
9
6
3

kgm
35
4
45

6

Ib
ft

3
9
5
2

kgm
28
2
37

6

Ib
fr

6
8

kgm
43
581b
ft

1
9
5

kgm
14
18Ib
fL

5
5
7
6

kgm
40
55Ib
ft

6
7
5

kgm
43
54Ib
ft

7
13

kgm
51
94Ib

ft

STEERING

1
8
2
5

kgm
13
18Ib
ft

5
5
7
6

kgm
40
55Ib
ft

12

5
14
0

kgm
90
101
lb

ft

5
5
7
6

kgm
40

55Ib
ft

1
8
2
5

kgm
13
18Ib
ft

10

kgm
72

Ib
ft

4
4
6
1

kgm
32
44Ib
ft

14

kgm
lOllb
ft

L5
2
5

kgm
II
18Ib
ft

1
5
2
5

kgm
II
18Ib
ft

2
0
2
5

kgm
14
5
18Ib
ft

6
8

kgm
43
4
57
8Ib
ft

4
4

6
1
kgm
32
44Ib
ft

5
5
7
6

kgm
40
55Ib
ft

4
4
6
1

kgm
32
44lb
ft

4
5

kgm
29
36
Ib
ft

1
3
1
8

kgm
9

4
13
0
lb

ft

4
5

kgm
29

36Ib
ft

L5
2
2

kgm
II
16Ib
ft

BRAKES

3
5
4
0

kgm
25
3
28
9

Ib
ft

1
5
1
8

kgm
10
8
13
0
lb

ft

3
9
5
3

kgm
28
2
38
3
IbJt

1
7
2
0

kgm
12
3
14
51b

fl

1
7
2
0

kgm
12
3
14
5lb

ft

7
3
9
0

kgm
52
8
65
llb
ft

0
5
0
7

kgm
3
6

5
llb
ft

1
4
1
8

kgm
10
13
Ib
ft

inter
QDu

w
P1

SUPPLEMENT
for
the

DATSUN
1800

SERIES
C
30
MODEL

WITH
G
18
ENGINE

Contents

INTRODUCTION

G
18
ENGINE

FUEL
SYSTEM

FRONT
SUSPENSION
STEERING

BRAKING
SYSTEM

TIGhlGJ
u

GTORQUES
SI

S2

SI7

S22

S30

S36

IntroductIon

This

supplement
has
been
added
to
include
Series

C
30

model

with
the
G
18

engine

Main

changes
only
are
detailed
in
the

following
pages
and

for
aU
other

information

please
CI
to

the
Manual
s

parent
sections

SI

interl
lli

f@

j

0

11

General
view
of
G
18

engine

Engine
installation
2
5
mm

0

0787
0
1969
n

l

Engine
nstatlstion
8
15
mm

0
3150
0
5906

1
i

1

1
1

Fig
A
3
Remo
Ying
the
canuohaft

sprocket

Fig
A
1
Front
mounting
insulator

f

A
J

A

0
0
L

I

o

i

r
1

m
if

0

1

l
r
t

I
IJ
t
o

ll
gf
Ii
o
unted

Vi
6
mm

10
2362

1

t

more
than

6
mrn
0

2362
in

Fig
A
2
Rear
mounting
insulator
Fig
A
4

Removing
the

cylinder
head

52

GIS

DESCRIYfION

ENGINE
Removal
and
Installation

ENGINE
MOUNTING

INSULATORS

ENGINE

Dismantling
Inspection
and
Overhaul

CHAMSHAFT

AND
CAMSHAFT
BEARINGS

CYLINDER
BLOCK

PISTONS

CONNECTING

RODS

CRANKSHAFT

ENGINE

Assembling

VALVE
CLEARANCE

Adjusting

DESCRIYfION

The
G
18

engine
is
a
short

stroke
unit
with
a

displacement

of
1
815
ce
The
aluminium

alloy
cylinder
head
has
cross
flow

ports
and
a
V

shaped
valve

layout
The

single
overhead
camshaft

is
driven
from
the
crankshaft

by
a
double
row
roller
chain
at
a

reduction

ratio
of
2
I

The
crankshaft
is
a

carbon
steel

forging
and
is

provided

with
five
main

bearings
and
four

balancing
weights
Aluminium

thrust

bearings
are
located
at

the
No
2

journal

The
cast
aluminium

alloy
pistons
have
two

comp
ression

rings
and
one
oil

ring
Gudgeon

pins
are

fully
floating
in
the

piston
bores
and
are

equipped
with

circlips
at

each
end
to
limit

the
amount

of
their
travel
The

forged
steel

connecting
rods

have
weight
adjusting
bosses
at
both

large
and
small
ends
to

insure
that
the
rods
are

correctly
balanced

during
operation

The

lubricating
system
is
of

the

pressure
feed

type
with

the
oil

pump
driven

by
a

gear
on
the
crankshaft
Oil
is
delivered

to
the
main

gallery
via
a
full
flow
ftlter

ENGINE
Removal
and
Installation

Although
the

engine
can
be
removed
as
a

single
unit
it

will

prove
an
easier

operation
to
remove

the

engine
with
the

transmission
Proceed
as
follows

Fit
the
engine
slingers
ST49760000
to
the

engine

Disconnect
the
battery
cables
and
lift
out

the

battery

Drain
the
coolant
and

engine
oil

2
Place

alignment
marks
on
the
bonnet
and

hinges
remove

the
bonnet
from
the
vehicle

3
Remove
the
blow

by
hose
from
the
rocker
cover
and
take

off
the
air
cleaner

4
Disconnect
the
accelerator

linkage
and
choke
cable
from

the
carburettor

S
Detach
the

upper
and
lower

radiator
hoses
remove
the

two
brackets
from
the
core

support
and
lift
the
radia
tor

away
from
the
vehicle
The

torque
convertor

oil

pipes
must

be
disconnected
from
the
oil
cooler
if
the
vehicle
is

equip

ped
with
automatic
transmission
Detach
the
fuel

pipe
if

fitted
from
the
engine
and

heater
hose

6
Disconnect
the
electrical

wires
from
the
alternator
thennal
EngIne

OIL
PUMP

OIL
PRESSURE
RELIEF
VALVE

OIL
FILTER

EMISSION
CONTROL
SYSTEM

IGNITION

TIMING
AND
IDLING
SPEED

Emission

control

system

EMISSION
CONTROL
SYSTEM
Maintenance

IGNITION
SYSTEM

IGNITION
TIMING

IGNITION
DISTRIBUTOR
Maintenance

SPARKING
PLUGS

transmitter
the

primary
side
of
the
distributor
oil

pressure

switch
starter

motor
and
reverse

light
switch

7

Remove
the
clutch
slave

cylinder
and
its
return

spring
from

the
transmission
as
described
in
the
section
CLUTCH

8
Disconnect
the
shift
rods
and
selector
rods
then
remove

the
cross
shaft

assembly
by
detaching
the
bracket
from

the
side
member
See
GEARBOX
section

9
Disconnect
the

speedometer
cable
and
detach
the
front

exhaust

pipe
from
the
exhaust
manifold

10
Disconnect
the

propeller
shaft
and

plug
the

gearbox
rear

extension
to

prevent
the
loss
of
oil

11
Jack

up
the

gearbox
slightly
and
remove
the
rear

engine

mounting
support
Take
out

the
bolts
which
secure
the

front

mounting
insulators
to
the
cross
member

12
Attach
chains
or
wire

rope
to
the

engine
Gradually
lower

the

jack
under
the

gearbox
and
carefully
lift
and
tilt
the

engine
and
gear
box
to
clear
the

compartment
Withdraw

the
unit

making
sure

that
it
does
not
foul
the
accessories

Installation
is
a
reversal
of
the
removal

procedure
RefIll

with
the
correct

quantities
of
oil
and
coolant
when
the

engine
is
installed

ENGINE
MOUNTING
INSULATORS

Replacing

The

front
and
rear

mounting
insulators
should
be
checked

with
the

engine
installed
to
make
sure
that
the
dimensions

conform
with
those

given
in

Figs
A
I
and
A
2

To
remove
the
front
insulator

proceed
as
follows

Position
a

jack
under
the
oil

sump
Make
sure
that
the

jack
is
clear
of
the
drain

plug
and
insert
a
wooden
block
between

the
jack
and

sump
to

prevent
the

sump
from

being
damaged

Remove
the
bolts

securing
the
insulator
to
the
front

suspension

member
and
the
nut

attaching
the
insulator
to
the

engine

mounting
bracket
Raise
the

jack
slightly
and
remove
the

insulator
To
remove
the
rear

mounting
insulator

proceed
as

follows

Position
a

jack
to
take
the

weight
of
the

gearbox
and
take

out

the
bolts

connecting
the
insulator
to

the
transmission
rear

extension

housing
Remove
the
bolts

attaching
the
cross
member

to

the
underside
of
the

body
and
withdraw
the
insulator

Installation

of
both
insulators

is
a
reversal
of
the

removal

procedures

S3

inter
l
iIJ

1lJLW

Fig
A
5

Removing
the
oil

pump
sprocket

y

x

A
S

AB10

a
1
yZ
rt

f

1
D

v
J
r
totl

35
0
1

v
J

v

0
d

3101
1

b
380

g
1

e

410

8
3
a

340
g
3

Fig
A
6

Lm
g
the
valve
seats

11

n
PILOT
BEARING

L

I
I

1
c

t

l

Fig
A
7

Measuring
the
ctankshaft

journals
and

crankpins
Fig
A

g

Removing
the
main
drive
shaft

pilot
hearing

16mm

0
236
in

PILOT
BEARING

Apply

grease

Fig
A
9

Fitting
the
main
drive

shaftpilot
hearing
Fig
A
11
Camshaft
and
camshaft
bracket

alignment
marl
s

i

IRScIItIon
Olrllole

ton
front
r
or
tM

rocbr
ft
IIWI

e
No
a

I

j
OIM

kImIII
roa
lIfIaft
oiIl
1or
nshclwn

in
tM

fil
In

Fig
A
lO
the

rocker
shaft

assembly

54

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