1969 DATSUN 610 stop start

that
it
is
clear
of
the
oil
hole
Install
the

bearing
caps
and

tighten
the

bolts
to
a

torque

reading
of
10
0
1
LO

kgm
72
3

79
51b
ft

The
standard
main

bearing
clearance
is
0
03
0
06
mm

0
0012
0
0024

in
with
a
wear
limit
of
0
1
mm
0
0039

in

If
the

specified
limit
is
exceeded
an

undersize
bearing
must

be

fitted
and
the
crankshaft

journal
ground
accordingly
Bearings

are
available
in
four
undersizes
See
Technical
Data

Connecting
rod

bearing
clearance

Check
the

connecting
rod

bearing
clearances
in
a
similar

manner
to
the
main

bearing
clearances
The
standard
clearance

is
0
03
0
06
mm
0
0012
0
0024
in
with
a
wear
limit
of
0

1

mm
0
0039
in
Undersize

bearings
must
be
fitted
and
the

crankpins
reground
if
the

specified
limit
is
exceeded
Bearings

are
available
in
four
undersizes
See
Technical

Data

Fitting
the
crankshaft

bearings

Check

the
fit
of
the

bearing
shells
in
the

following
manner

Install
the

bearings
on
the
main

bearing
caps
and

cylinder
block

bearing
recess
and

tighten
the

cap
bolts
to
the

specified
torque

reading
of
10
0
11
0

kgm
72
3
79
5
Ib
ft
Slacken

one
of
the

cap
baits
and
check
the
clearance
between
the

cap
and

cylinder

block
with
a
feeler

gauge
as
described
for
the
L14
Ll6
and

LIS

engines
The

bearing
crush
should
be
from
0
to
0
04
mm

0
to
0
0016
in

Replace
the

bearing
if
the
clearance
is
not
correct

Check
the

connecting
rod

bearings
in
a

similar
manner

after

tightening
the
rod

cap
bolts
to
a

torque
reading
of

4
5
5
0

kgm
32
6
36
2
Ib
ft

ENGINE

Assembling

Make
sure
that
all

components
are

perfectly
clean
before

starting
to
assemble
the

engine
Refer
to

the
instructions

given

for
the
L14
U6
and
LIS

engines

Cylinder
Head

Install
the
valve

spring
seats
and
valves
Fit
the
oil
seal

rings
on
the
valve
stems

and

place
the
seal

ring
covers
over

the

oil
seal

rings
Note

that
a

gap
of
from
0
3
to
0
7
mm
0
0118

to
0
0276
in
should
be

present
between
the
seal

ring
cover
and

spring
seat

If
the

gap
is
less
than
0
3
mm
0
0118
in

the
oil

seal

ring
or
the
cover
must
be

replaced
Assemble
the
valve

springs
and
retainers

Compress
the
valve

springs
and
install
the

cotters
See
instructions
for
the
LI4
U6
and
Ll8

engines

Assemble

the
camshaft

brackets
valve
rockers
seats

spacers

and

springs
on
the
rocker
shafts
in
the
order
shown
in

Fig
A
l
O

Note

that
the
exhaust
rocker
shaft
has
identification
marks

but

the
intake
rocker
shaft
has
not
Make
sure
that
the
oil
holes

point
in
the
direction
shown
It

may
be
advisable
to
insert

any

convenient
bolts
into
the
bolt
holes
of
the
front
and
rear
cam

shaft
brackets
to

prevent
the

assembly
from

being
displaced

Mount
the
camshaft
on

the
head
fit

the
rocker

assembly

and

tighten
the

nuts
Make
sure
that
the
mark
on
the

flange
of

the
camshaft
is

aligned
with
the
arrow
mark
on
the
No
I
earn

shaft
bracket
as
shown
in

Fig
A
II

Pistons
and

connecting
rods

Assemble
the

pistons
gudgeon
pins
and

connecting
rods

in
accordance
with
the

cylinder
numbers
Heat
the

piston
to
a

temperature
of
500
to
600
1220
to

1400F
and

press
the

gudgeon
pin
in

by
hand
The

pistons
and

connecting
rods
must
be
assembled
as
shown
in

Fig
A
12
with

the
arrow
mark
on
the
head
of
the

piston
pointing
to
the
front

of
the

engine

Fit
new

clips
to
both
ends
of
the

gudgeon
pins
as
indicated

in
Fig
A
13
Fit
the

piston
rings
with
the
marks

facing
upwards

Place
the

bearings
on
the

connecting
rods
and

caps
making
sure

that
the
backs
of
the

bearing
shells
are

perfectly
clean

Assembling
the

engine

Insert
the
oilscal
into
the

grooves
of
the

cylinder
block

and
rear

bearing
cap
Fit
the
seal
down
with
the

speCial
tool

ST49750000
if
available
as
shown
in

Fig
A
14

and
trim
off

the
excess
with
a
knife

Apply
sealing
agent
to

the
oil

plug
and

install
it
in
the
cylinder
block

Fit
the
main

bearings
lubricate
with
clean

engine
oil
and

install
the
crankshaft
Fit
the

bearing
caps
and

tighten
the
bolts

to

a

torque
reading
of
10
0
to
I
LO

kgm
72
3
to
79
5
Ib
ft

Note
that

liquid
packing
should
be

applied
to

the
rear
bear

ing
cap
surfaces
as
shown
in

Fig
A
15

Fit
the
thrust
washers
at
both
sides
of
the
No
2

bearing

with

the
oil
channel
in

the
washers

facing
the
thrust

face
of
the

crankshaft
Install
the
rear

bearing

cap
side
seal
so

that
is

projects

0
2
to

0
6
mm
0
008
to

0
024
in

from
the
lower
surface
of

the

cylind
r

block
then

apply
liquid
packing
to
the

projecting

tip

Install
the

engine
rear

plate
Fit
the

flywheel
and

tighten

the
bolts
to
a

lorque
reading
of
10
0
to
11
0

kgm
72
3
to
79
5

ib
ft

using
new
lock
washers

Lubricate
the
crankshaft

journals
pistons
and
cylinder

bores
with
clean

engine
oil
and
install
the

piston
and

connecting

rod
assemblies
The

pistons
should
be

arranged
so
that

the
arrow

marks
face
towards
the
front
and
with
the

piston
ring
gaps
at

1800
to
each
other
Make
sure
the

gaps
do
not
face
to
the

thrust
side
of
the

piston
or
in
the
same
axial
direction
as
the

gudgeon
pin

Install
the

connecting
rod

caps
o
that
the
marks
face
the

same

way
and

tighten
the
bolts
to
a

torque
reading
of
4
5
to

5
0

kgm
32
6
to
36
2
Ib
ft
Bend
the
lock
washers
as
shown

in

FigA16

Fit
the
oil

jet
to
the
front
of
the

cylinder
block
Install

the
chain
tensioner
and

stopper
crankshaft

sprocket
and
timing

chain

Note
that
the

timing
mark
on
the
chain
must
be

aligned

with
the
mark
on
the

sprocket
as
shown
in

Fig
A
17

Smear
the

mounting
face
of
the
oil

pump
with

sealing
agent

Three
Bond
No
4
or

equivalent
install

the

pump
and

tempora

rily
tighten
the

mounting
bolts

Adjust
the
tension
of
the
oil

pump
chain

using
the

pin
as
the
central

point
then

tighten
the

mounting
bolts

Install
the
oil
thrower
Fit
the
chain
cover
into

position

after

coating
the
new
cover

gasket
with

sealing
compound
Cut

off
the

projecting
parts
of
the

gasket

Fit
the
crankshaft

pulley
and

tighten
the

pulley
nut
to
a

torque
reading
of
15
0
to
20
0

kgm
108
5
to
144
61b
ft
Bend

the
lock
washer
Install
the
oil
strainer
and
oil

pump

Invert
the

engine
and
set
the
No
I

piston
to

T
D
C
of
the

compression
stroke
Note

that
the
notch
on
the
crankshaft

S9

The

type
D3034C
carburettor
has
certain
additional

features

These
include
a

power
valve
mechanism
to

improve
the

performance

at

high
speed
a
fuel
cut
off
valve
which
cuts
the
fuel

supply

when
the

ignition
key
is
turned
to
the
off
position
and
an

idling

limiter
to

maintain
the

emissions
below
a

certain
level

Sectional
views
of
the
two

types
of

pumps
are
shown
in

Figs
8
1
and
B
2
An
EP
3
electrical
fuel

pump
is

located
in
the

centre

of
the
spare
wheel

housing
in
the
boot

Fig
B
3
shows
a

sectional
view
of
the

pump
with
its
contact

the
pump
mechanisms

solenoid

relay
and
built
in
filter

The
air
cleaner
uses
a

viscous

paper
type
element
which

should
be

replaced
every
40
000
km
24
000
miles

Cleaning

is
not

required
and
should
not
be

attempted

The

cartridge
type
fuel
strainer

incorporates
a
fibre
clement

which
should
be
renewed
at
inervals
not

exceeding
40
000
km

24
000
miles
Fit
B
4
shows
a
sectional
view
of

the
assembly

The
fuel
lines
should
not
be
disconnected
from
the
strainer
when

the
fuel
tank
is
full

unless
absolutely
necessary
as
the
strainer

is
below
the
fuel
level

FUEL
PUMP

Testing

Disconnect
the
fuel
hose
from
the

pump
outlet
Connect

a
hose
with

an
inner
diameter
of
approximately
6
mm
0
024

in
to

the

pump
outlet
and

place
a

container
under
the
end
of

the

pipe
Note
that
the
inner

diameter
of
the

pipe
must
not
be

too

small
or

the
pipe
will
be

incapable
of

delivering
the
correct

quantity
of
fuel
when

testing
Hold
the
end
of
the
hose
above
the

level
of
the

pump
and

operate
the

pump
for
more
than
IS

seconds
to
check
the

delivery
capacity
The

capacity
should
be

I
400
cc

3
24
U
S

pts
in
one
minute
or
less
The

pump
must

be
removed
from
the
vehicle
if
it
does
not

operate
or
if
a

reduced

quantity
of
fuel
flows
from
the
end
of
the
hose
Remove

the
pump
from
the
vehicle
and
test
as
follows

Connect
the

pump
to
a

fully
charged
battery
If
the

pump

now

operates
and

discharges
fuel

correctly
the
fault
does
not

lie
in
the

pump
but

may
be
attributed
to

any
of
the

following

causes

Battery
voltage
drop

poor
battery
earth
loose

wiring

loose
connections
blocked
hoses
or
a

faulty
carburettor

If
the

pump
does
not

operate
and

discharge
fuel
when

connected
to
the

battery
then
the

pump
itself
is

faulty
and

must
be
checked
as
follows

First
make
sure
that
current
is

flowing
This
will
be
indica

ted

by
sparking
at

the
tenninals
If
current
flows
the
trouble
is

caused

by
a

sticking

pump
plunger
or

piston
The

pump
must

be
dismantled
in

this
case
and
the

parts
thoroughly
cleaned
in

petrol

If

the
current
does
not
flow
a
coil
or
lead
wire
is
broken

and
the

pump
must

be
renewed
A

reduced
fuel
flow
is
caused

by
a

faulty
pump
inlet
or

discharged
valve
or
blocked
filter

mesh
The

pump
must

of
course

be
dismantled
and
serviced
as

necessary

FUEL
PUMP

Removing
and

Dismantling

Remove
the
bolts

attaching
the
fuel

pump
cover
to

the

floor

panel
see

Fig
B
S
Remove
the
bolts

attaching
the

pump
to
the
cover

2
Disconnect
the
cable
and
fuel
hoses
Withdraw

the

pump
Dismantle
as
follows

Slacken
the

locking
band
screws
and

remove
the
strainer

strainer

spring
filter
strainer
seal
and

locking
band

Remove
the

snap
ring
Withdraw
the
four
screws
from
the

yoke
and
remove

the
electromagnetic
ulJ
it
Press
the

plunger
down
and
withdraw
the
inlet
vaive

the

packing

and
the
cylinder
and

plunger
assembly

A
defective
eledrical
unit

cannot
be
dismantled
as

it
is

sealed
and
must

be
renewed
as
a

complete
unit

FUEL
PUMP

Inspection
and

Assembly

Wash
the
strainer
filter
and

gasket
in

petrol
and

dry
using

compressed
air
Renew
the
filter
and

gasket
if

necessary
Note

that
the
filter
should
be
cleaned
every
40
000

km
24
000

miles
Wash
the

plunger
piston
and
inlet
valve
in

petrol
and

make
sure
the

piston
moves

smoothly
in
the

cylinder
Replace

the

parts
if
found
to
be
defective

Insert
the

plunger
assembly
into
the

cylinder
of
the
electri

cal
unit
and
move

the

assembly
up
and
down
to

make
sure
tha
t

the
contacts
are

operated
If
the
contacts
do
not

operate
the

electrical
unit
is

faulty
and
must

be
renewed

Assembly
is
a
reversal
of

the
dismantling
procedures
tak

ing
care
to
renew
the

gaskets
as

necessary

CARBURETIOR

Idling
Adjustment

The
D3034C
carburettor
fitted
to

engines
equipped
with

an
emission
control

system
must
be

adjusted
as
described
under

the

heading
IGNITION
TIMING
AND
IDLING
SPEED
in
the

section
EMISSION
CONTROL
SYSTEM

Reference
should
be
made
to
carburettor

idling
adjustment

procedures
for
the
L14
L16

and
LI8

engines
when

adjusting

the
type
DAK
340
carburettor
fitted
to
the
G
18

engine
A
smooth

engine
speed
of

approximately
550

rpm
should
be
attained
in

this
case

FUEL
lEVEL

Adjustment
DAK
340earburettor

A
constant
fuellevcl
in
the
float
chamber
is
maintained

by

the
float
and
needle
valve
See

Fig
8
6
If

the
fuel
level
does
not

correspond
with
the
level

gauge
line
it
will
be

necessary
to

care

fully
bend
the
float
seat
until
the
float

upper
position
is

correctly

set

The
clearance
H
between
valve
stem
and
float
seat

should

be
I
5
mm
0
0059
in
with
the
float

fully
lifted

Adjustment

can
be
carried
out

by
carefully
bending
the
float
stopper
3

FUEL
lEVEL

Adjustment
D3034Ccarburettnr

The
fuel
level
should

correspond
with
the
level

gauge
line

Adjustment
can

be
carried
out
if

necessary
by
changing
the

gaskets
between
the
float
chamber

body
and
needle
valve
seat

The
gaskets
are
shown
as
item
4
in

Fig
B
7
When

correctly

adjusted
there
should
be
a

clearance
of

approximately
7
mm

0
027
in
between
float
and
chamber
as
indicated

STARTING

INTERLOCK
VALVE
OPENING

The

choke
valve
at
its

fully
closed
position
automatically

opens
the
throttle
valve
to
an

optimum
angle
of
14

degrees
on

the

type
DAK
340
carburettor
and
13
5

degrees
on
the
D3034C

carburettor
With
the
choke
valve

fully
closed
the
clearance

G

I
in

Fig
8
should
be
1

I
mm
0
0433

in
This
clearance

S19

Onter
1

2

I

J
I

I

I
r

f
r

1
Float
SelllC

2
F10aI

3
Ffotzt
toppt
T

4

Nudk
m
1
F10at

2

Float
WJlve
ltat

3
Float
valJ1e

4

AcJiwtiflK
tpsket

5

Stopper

Fig
B
6

Adjusting
the
fuel
level
DAK340
C3tbutettor

Fig
B
7

Adjusting
the
fuel
level
D3034C

carburettor

1

11

J
Xi

I

tf
J
t

I

3

J

I

J
Th

1
Choke
mr

r
2

Otoke
m

LuL
3

Conn
ting
rod

4
Connectinlla
o

5
TIuottle
lever

Fig
B
S
Adjusting
the

starting
interlock

opening

6
O
1
Co1UJeCdrlK
lev

2
Rerum

plate

3

Adiust
pWe

4
17rrottle
clrzmber

5
Throttle
valve
1
S
Throttle
arm

2
S

Throttle
ntum
lever

3
Link

4
P1lIrortle
tml

5
P

1lIro
lle
valve

l

I

4
J
L

5
iF
l

1

L

Fig
B
9

Adjusting
the
throttle
valve
interlock

opening
OAK340
carburettor
Fig
B
lO

Adjusting
tbe
throttle
valve
interlock

opening
D3034C

carburettor

520