engine coolant DATSUN 610 1969 Workshop Manual

EngIne

INTRODUCTION

ENGINE

Removal

ENGINE

DismantUng

ENGINE

Inspection
and
Overhaul

VALVES
VALVE
GUIDES
VALVE
SEAT
INSERTS

CAMSHAFT
AND
CAMSHAFT

BEARINGS

Checking

CYliNDER

BLOCK

PtSTONS

AND
CONNECTING
RODS

INTRODUCTION

The
1400
1600
cc

and
1800
cc

engines
are
four

cylinder

in
line
units
with
a

single
overhead
camshaft

and

fully
balanced

five

bearing
crankshaft

The
valves
are

operated
through
rockers

which
are

directly
activated

by
the

earn
mechanism

The
crankshaft
is
a

special
steel

forging
with
the
centre

main

bearing

equipped
with
thrust
washers

to
take

up
the
end

thrust

of
the
crankshaft
The

special
aluminium

pistons
are
of

the
strut

construction
to

control
thermal

expansion
and

have

two

compression
rings
and
one
combined
oil

ring

The

gudgeon
pins
have

special
hollow
steel
shafts

and
are

a

fully
floating
fit
in

the

pistons
and
a

press
fit

in
the

connecting

rods

The
aluminium

alloy
cylinder
head
contains

wedge
type

combustion
chambers

and
is
fitted
with
aluminium

bronze
valve

seats

for
the
intake
valves

and
heat
resistant
steel
valve
seats

for
the
exhaust

valves

The
cast

iron
camshaft
is
driven

by
a
double
row
roller

chain
from
the
crankshaft

pulley

The

engine
is

pressure
lubricated

by
a
rotor

type
oil

pump

which
draws
oil

through
an

oil
strainer
into
the

pump
housing

and
then
forces

it

through
a
full
flow

oil
filter

into
the
main
oil

gallery

ENGINE
Removal

Place

alignment
marks
on
the
bonnet

and

hinges
remove

the
bonnet
from
the
vehicle

2

Drain
the

cooling
system
and
engine
and
transmission

lubricant
Remove

the
radiator

grille

3
Discon
ect
the

battery
cables

and
lift
out
the

battery

4
Detach
the

upper
and
lower
radiator

hoses
remove

the

radiator

mounting
bolts
and
lift
the
radiator

away
from

the
vehicle

The

torque
converter

c

jng
pipes
must

be

disconnected
from
the
radiator
on
vehicles

fitted
with

automatic
transmission

S
Remove

the

COOling
fan
and

pulley
disconnect

the
fuel

pipe
from
the
fuel

pump
and

the
heater
hoses
from

the

engine
attachments

6
Disconnect

the
accelerator
control

linkage
and
the

choke
CRANKSHAFT
AND
MAIN
BEARINGS

CAMSHAFT
AND
SPROCKET

FLYWHEEL

ENGINE

Assembling

VALVE
CLEARANCES

Adjusting

ENGINE

LUBRICATION
SYSTEM

OIL
PUMP

OIL
FILTER

CHANGING
THE
ENGINE

OIL

cable
from
the

carburettor

7
Disconnect

the

wirings
from

the
starter
alternator

ignition
coil
oil

pressure
switch

and

temperature
sender

unit

8
Remove

the
clutch
slave

cylinder
Fig
A
2

and
its
return

spring

9
Disconnect

the

speedometer
cable
and
withdraw

the

plug

connector
from
the

reversing
light
switch

10
Disconnect

the
shift
rods
and
seJector

rods
and
remove

the
cross
shaft

assembly
as
described

in
the
section
Gear

box

II
Disconnect

the
front
exhaust

pipe
from
the

exhaust

manifold
disconnect
the
centre

pipe
from

the
rear

pipe

and
remove

the
front

pipe
pre
muffler
and
centre

pipe

assembly

12
Disconnect
the

propeUer
shaft

flange
from
the

companion

flange
from
the

gear
carrier

13
Jack

up
the

gearbox
slightly
and
remove
the
rear

engine

mounting
bracket
bolts
remove
the

mounting
cross

member
and
handbrake

cable

c1amp

14
Remove
the
bolts

securing
the
front

engine
mounting

brackets
to
the
crossmember

15

Attach

lifting
cable
or

chains
to
the
hooks
installed
at

the
front
and
rear
of
the

cylinder
head

Lower
the

jack

under

the

gearbox
and

carefully
lift
and
tilt
the

engine
and

gearbox
unit
Withdraw
the

engine
and

gearbox
from
the

compartment

making
sure
that
it
is

guided

past
the

accessories
installed
on
the

body

ENGINE

Dismantling

Remove
the

engine
as

previously
described
and

carefully

clean

the
exterior
surfaces

Cbeck
for

signs
of
fuel
oil
or

water
leaks

past
the

cylinder
head
and
block
Remove
the
air

cleaner
alternator

distributor
and
starter
motor

Plug
the

carburettor
air
horn

and
distributor
hole
to

prevent
the

ingress

of

foreign
matter

Remove
the

gearbox
from

the

engine
drain
the

engine
oil

and
coolant
Mount
the

engine
in
a
suitable

stand
the

special

engine
attachment
ST05260001
and

engine
ST0501SOO0
should

be
used
if
available

Fig
A
3

5

CoolIng
System

GENERAL

FAN
BELT
TENSION

FLUSHING
AND
DRAINING
THE
SYSTEM

THERMOSTAT

Testing

RADlA
TOR
Removal

GENERAL

The

cooling
system
is

pressurised
and

incorporates
a

water

pump
corrugated
fin

type
radiator
fan
and
a

pellet
type

thermostat

The
water

pump
is
of
the
centrifugal
type
and
has
an

aluminium
die
cast

body
The
volute
chamber
is
built
into

the

front
cover

assembly
and
a

high
pressure
sealing
mechanism

prevents
water

leakage
and
noise

The
fan

pulley
is
driven

by
the
V
belt
from
a

pulley
on

the
crankshaft

he

pellct
type
thermostat
enables
the

engine
to
warm

up

rapidlY
and
also

regulates
the

temperature
of
the
coolant
When

the
wax

pellet
in
the
thermostat
is
heated
it

expands
and
exerts

pressure
against
a
rubber

diaphragm
causing
the
valve
to

open

and
allow
the
coolant
to
flow
from
the

cylinder
head
back
to

the
radiator

As
the

pellet
is

cooled
itcontractsand
allows
the

spring
to

close
the
valve

thereby
preventing
coolant
from

leaving
the

cylinder
head

The
rad
ator
is
of
the
down

flow
type
with
an

expansion

tank
The
relIef
valve
in
the
radiator
filler

cap
controls
the

pressure
at

approximately
0
9

kg
sq
cm

l3Ib
sq
in
Always

try
to
avoid

removing
the
filler

cap
when
the

engine
is
hot
as

coolant

may
spray
out
and
cause

scalding

If
the

cap
must
be
removed
in
these
circumstances
use
a

lar
e

pic
c
of
cloth
to
hold
the

cap
and
turn

the
cap
sli

htlY

Walt
until
all

pressure
has

been
released
before

lifting
off
the

cap

F
AN
BELT
TENSION

The
fan
belt
drives
the
water

pump
and
alternator
as

well

as

the
fan
and
its
correct

adjustment
is
most

essential
A
loose

fan

belt
will

sl
ip
and

Y
e
r

and
most

probably
cause

overheating

alternatively
If
the
belt
IS
too

tight
the
pump
and
alternator

bearings
will
be
overloaded

The
belt
is

correctly
tensioned
if
it
can
be
depressed

by

approximately
10
mm

1
2
in
at
a

point
midway
between
the

fan
and
alternator
pulleys
See

Fig
R2

If

adjustment
is
neces

ary
slacken
the
alternator

mounting

and

adjustment
bolts
and

pivot
the
alternator

away
from
the

engine
to

tighten
the
belt
to

towards
the

engine
if

the
belt

is

to
be
slackened

NOTE

Always
apply
leverage
to
the
drive
end

housing
when

pivoting
the
alternator
and
never
to
the
diode
end

housing
or
the
alternator
will
be

damaged
Retighten
the
alternator
bolts
and
make
SUfe

that
the
belt

is

correctly
tensioned

FLUSHING
AND
DRAINING
THE
SYSTEM

The
radiator
and
water

passages
should
be
flushed
out

periodically
to
remove
the
accumulated
scale
or
sediment

Reverse

flushing
equipment
should
be
used
to

carry
out
a

completely
thorough
flushing
operation
but
the
owner
drivef

not

possessing
this

type
of

equipment
can
flush
out
the

system

in

the
following
manner

Drain
the
system
by
removing
the
radiator
filler

cap
and

opening
the
radiator
and

cylinder
block
drain

taps
Close
the

taps
again
and
refill
the
radiator
Run

the
engine
for
a
ShOft

period
and
then
rc
open

the
drain
taps
Continue
this

sequence

until
the
water

flowing
from
the

taps
is
clean
then
close
the

taps

and
refill
the
radiator

An
anti
freeze
mixture
should

always
be
used
in
Winter

time
The
Niss3n

long
life
coolant
L
L
c
is
an

ethylene
glycol

solution

containing
a
corrosion

preventative
which
can
remain

in
the
vehicle

throughout
the
year
but
must
not

be
mixed
with

other

products

It
is
advisable
to
check
the
radiator
and
heater
hoses
when

filling
with
anti
freeze
and
renew

them
if

signs
of
deterioration

are

apparent

WATER
PUMP

Replacement

The
water
pump
must
not
be
dismantled
and
should
be

renewed
if
it
becomes

faulty
The

pump
can
be
removed
in
the

following
manner

Drain
the

cooling
system

2
Take
the
fan
belt
off

the
pulley

3
Remove
the
fan
and

pulley

4
Remove

the
retaining
nuts
and
withdraw
the
water

pump

See

Fig
B
3

lnstallation
of

the

pump
is
a

reversal
of
the
removal

procedures

rERMOST
ATTesting

The
thermostat
is
located
in
the
water
outlet

passage

See

Fig
B
4
To
remove
the
unit
drain
the
cooling

system

remove
the
radiator
hose
and
the
water
outlet
elbow
Take
out

the
thermostat

25

N
Engme
SYMPTOMS
I

Trouble
Shooting
Lubrication
System

SYMPTOMS

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ENGINE
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ENGINE
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OOES
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ENGINE
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BUT
RUNS
FOR
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PERIODS
aNL
Y

ENGINE
I
tISFIRES
AT
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ENGINE
MISFIRES
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ENGINE
MISFIRES
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ENGINE
MISFIRES
ON
ACCELERATION

AND
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IDLE

RUNS
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HIGH
SPEED

lACK
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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