DATSUN 510 1968 Service Service Manual

36
CHAPTER
SIX

0B

34

35

2224
19

21

p
7

31

13

4

7

O

41

rlj
17

11
lOlL
JET

2
Intake
valve

Insert

3
Exhaust
valve
Insert

4
Intake
valve

guide

5
Exhaust
valve

guide
3
2

7
Od

gallery
taper
plug
I

441
J

8

Cylinder
blind

plug

9

Cylinder
blind

plug

10

Taper
plug
21
Washer
34
Rocker
cover

44

Spnng
washer

11

Cylinder
head
011

jet
22
Front
head
cover
35
Rocker
cover

gasket
45
Water
outlet

12
stud
23
Bolt
36
Od
filler

cap
46
JOint
washer

13
stud
24
Front
cover
head

gasket
37
011

cap
paclung
47
stud

14
stud
28
Hex
bolt
38
Rocker
cover
bolt
48
Hex
nut

15
Stud
29
lock

washer
spring
39

Thennostat
a5sem
bly
49

Spring
washer

17
Cylinder
head

gasket
30

Engine
front

Slinger
40
Thennostat
hOUSing
50
Water

temperature

gauge

18

Cylinder
head
bolt
31

Engine
rear

slinger
41
Thennostat

gasket
51
Water

temperature
ground
nut

19

Cylinder
head
bolt
32

Spnng
washer
42
Hex
bolt
53
Cam
bracket
bolt

20

Cylinder
head
bolt
33
Hex
nut
43

Hex
bolt
54
Cam
bracket
bolt

shoe

type
of
tensIOner
reduces
vibration

and

controls
overall
cham

tenSIOn

MANIFOLDS

The
intake
and
exhaust
manifolds
are
shown

in

Figure
10
The
intake
mamfold
IS

made
out

of
cast
aluminum
and
the

eXhaustof
casn
roir

OIL
PUMP

The
oil

pump
is
mounted
to
the
bottom
left

hand
side

of
the
front

cover
Refer
to
the

pre
@

ENGINE

37

CD

4

11lL

8

311
@
2S

10

32
@
@
24

33
Q
23

1
21

rl
qp

12
26

27

19
34

30

31
1
25

@
24

W
32
@

30

33
0

21

28
tJ

2S
ctJ5J

27

20

II

27

Inner
valve
seat

spnng

1
Camshaft

10
Camshaft
cham
19
Intake
valve

28
Valve
011
seal

2
Camshaft
dowel

11
Chain
tensloner
20
Exhaut
valve

29
Valve
rocker

4
Cam

locating
plate
12
Hex
bolt
21
Valve

spnng
30
Valve
rocker
WIth

pad

5

Spnng
washer

13

Spnng
washer
22
Valve

spnng
31
Valve
rocker

Pivot

6
Hex
bolt

14
Chain
tension
Side

gUide
23
Valve

retamer
32
Pivot
ICICk

nul

7
Cam
sprocket
15
Chain
tension
slack

gUide
24
Valve
collet

33
Rocker

retainer

8
Cam

gear
bolt
16

Spnng
washer
25
Rocker

valve
guide
34
Rocker

valve

spnng

9
Fuel

pump
earn

assembly
17
Hex
bolt
26

Valve
seat
35

Rocker

bushing

vious

chapter
for

specmcaoons
and
mamten

ance
CARBURETOR

The
carburetor

IS
a

smgle
two
barrel
down

draft

type
From
1968

through
1971
the
car

buretor

on
manual
transmissIOn
models

has
a

hand
choke

control
1972
models
are

eqUIpped

With
an
automatic
choke
much
the

same
as
has

been

used
on
all

automaoc
transmISSion
models
FUEL
PUMP

The
fuel

pump
IS
on
the
front

right
hand
Side

of
the

engme
Just
below
the
rocker
arm
cover

It

IS
a

diaphragm
type
dnven

by
the
camshaft

38

CHAPTER
SIX

EMISSION

CONTROL
DEVICES

All

Datsuns
have
a
sealed

type
of
crankcase

emISSion
control
device
and
an
exhaust
emISsion

control
deVice
Models
sold

m
Cahfornla

smce

1970
also
have
an

evaporative
emisSion

control

deVice
An

rmportant
part
of
the

exhaust
control

device
is
the
air

pump
located

at
the

bottom
left

hand
side
of
the

engme
It

IS
dnven

by
a
belt
off

of
the
crankshaft

pulley
and

supphes
air
to
the

exhaust

system
In
1972

an
electric
blower
in

corporated
m
the

air
cleaner

replaced
the

mechanical

pumI

ENGINE
REMOVAL

Expenence
has

shown
It
IS
easier

to
remove

the

engine
and

the
transmission

as
a

smgle
UnIt

than

to
remove
the

engme
alone
Once

the
en

gine
and

transmiSSIon
are

out
of

the
vehIcle
the

tranSmIssion
can
be

detached
from
the

engme

To
remove
the

engme
transmISsion

proceed

as
follows

1
Scribe

ahgnment
marks
on
the
hood

around

the

hmges
ThIS

will
make
remstallatlon

eaSIer

2
Remove
the

two
bolts
that
secure

each

hInge

and

remove
the
hood

It
is

not

necessary
to
re

move
the
hood

support
from

the

engme
firewall

3

DISconnect
the
lower

radIator
hose

from
the

right
hand
SIde
of
the

engine
and
at
the
bottom

of
the
radIator
ThIS
will

pernnt
coolant
to
dram

from
the

engme
and
the

radIator

4

Remove
the
draIn

plugs
from
the

engine

pan

and
translIDSsIon

and

completely
dram
lubn

cants
Into
suitable

contamers

5
DISconnect

the

battery
cables
from

the
bat

tery
loosen

the
two
hold
down

clamps
and

re

move

the

battery

NOTE

The
location
and

number

of

hoses

to
be
removed

from
the
air

cleaner
varies

from
model
to

model

It
IS

normally
easier
to
remove

the

hoses

from
the
sources
rather

than

try

to

dISconnect

them

from

yndemeath

the

air

cleaner
The
1972
model

Will

requlre
dlsconnectlOn

of
the
electrica1

cirCUit

In
the
air

cleaner

system
wing
nut
from
the

top
of
the
air
cleaner
and

remove
the

aIr
cleaner

7
DIsconnect
the

upper
radiator
hose
from
the

radiator
and
the
thermostat

housmg
Remove

the
hose

8
Disconnect
the
two
heater

hoses
from

the

nght
hand
side
of
the

engme
TIe
these
bac
so

they
won
t
interfere
with

removal
of
the

engme

9
Remove
the
radIator

grille

by
unscrewing
all

mountmg
screws

10
Remove
the
four

mounting
screws

holding

the
fan
shield
to
the
backside

of
the

radiator

11
Remove
the
four

mountmg
bolts

holdIng
the

radiator

In

place
In
automatic
tranSmISsion

models
dISconnect

the
two
transnnsslOn
oIl

cooler

lInes
from

the
bottom
of
the
radiator

Pull
the

radiator

straight
up
to
remove
Remove

the
fan

shield

12
Loosen

the

adjustment
and

mounting
bolts

from

the

retamIng
brackets
on
the
alternator

and

air

pump
If
so

eqwpped
The

alternator
is
lo

cated
at
the
bottom

nght
hand
Side
of
the

engme

and
the
air

pump
on
the

lower
left
hand
Side

13
Loosen
tenSIon

on
the

two
dnve
belts

re

move
the
belts
from

the
alternator
and
air

pump

and
then
from
the

fan

pulleys

14
Remove
the
bolts

holdIng
the
fan
and

pulley

to
the
water

pump
assembly
and
remove
the

fan
and

pulley

15

DISconnect
the
fuel
hne
from
the
fuel

pump

16
DIsco

ect
accelerator

control

linkage
and

choke

WIre
at
the
carburetor

17
Disconnect

the

wiring
from

the
starter

motor
alternator

Ignition
coIl
oIl

pressure

switch

and

temperature

transmItting
unit

NOTE
The

following

steps
are

per

formed

from
under
the
car
lack

up

the

front
of
the

car
and

position

stands
under

the

front
support

points

to

proVide

working
room

under

the

vehicle

WARNING

Never

climb
under
a
vehicle
that
is

supported
by
the

lack
only
If
stands

are

not
avflllable

sturdy
wooden

blocks
can

be
U3ed

6
Disconnect
all
hoses

that
lead
to
the

air

cleaner

remove
two

bolts
that
hold
the
air

cleaner
to

its

mountmg
bracket

unscrew
the
18
Remove
two
bolts

holdIng
the
clutch

operat

Ing
cylInder
to
the

flywheel
hOUSIng
shown

m

ENGINE
39

Figure
11
Remove
the
clutch
return

spnng
from

Its

holdmg
bracket
and
the
clutch

operatmg

cylmder
from
the
clutch
withdrawal
lever

19
Disconnect
the

speedometer
cable
from
the

side
of
the
transnnsslOn
as
shown
m

Figure
12

20
Disconnect
the
flat

attachmg
plug
connector

from
the
reverse

lamp
sWitch
on
the

translDlSSlon

housing

21
At
the
transnnsslOn

housmg
disconnect
the

shIft

and
the
select
rods
Remove
the
cross
shaft

assembly
by
remOVIng
Its
bracket
from
the
Side

member

22
DISconnect
the
front
exhaust

pipe
from
the

exhaust
manIfold

by
remoVing
the
two
connect

mg
bolts

23
Disconnect
the
center
exhaust

pipe
from
the

rear
exhaust

pipe

24
Remove
the
front
exhaust

pipe
the

pre
muffler
and
the
center
exhaust

pipe
from
the

vehicle

25
Disconnect
the
dnve
shaft
from
the

matIng

flange
of
the

gear
carner

26
Insert
a

Jack
under
the
transmiSSIOn
and

jack
It

up
Just
a
little
to
remove
some
of
the

tension
from
the
rear
motor
mounts

CAUTION

Use
care
m
the

placement
of
the

lack

head
to

prevent
transmiSSIOn

housmg

damage
A
block

of
wood
can
be
m

serted

between
the

Jack
head
and

transmISSIOn

for

protection
The
block

of
wood
should
be

long
enough
to

span
the
transmiSSion

housmg

27
Remove
the
rear

engine
mountIng
cross

member

by
remoVing
the
bolts

holdmg
the
en

gine
mountIng
msulator
the

mountIng
cross

member
and
the
handbrake

clamp

28
Remove
the
bolts

secunng
the
front

engine

mountmg
msulators
to
the
front
cross
member

NOTE
At
thiS
time
all
Wires
hoses

and

lmkages
should
have
been
dIScon

nected

from
the

engme
and
transmIS

sIOn

Recheck
thiS
and

make
sure
that

no
loose

ends
Will

hamper
actual
en

gme
removal

29

RIg
a
cham

or
cable
hOist
to
the

lifting
eyes

stnngers
located

on
the

nght
front
and
left

rear

of
the

cylmder
head
Take

up
slack
m
the
hOist

30

Figure
13
shows
the

engme
bemg
lifted
Re

move
the

engine
slowly
by
lowenng
the

jack

beneath
the
transnnssion

gradually
until
It
can

@

40
CHAPTER
SIX

be
removed
Hoist
the

engme
off

Its
mounts
and

adjust
the
cham
or
cable
to
tIlt
the

engme
as

shown
in
the
illustration
ContInue
to

raIse

gradually

31
Once
the

engine
and
transmission
are
clear

of
the
vehIcle
lower
them
to
a
swtable

support

or
stand
and
dIsconnect
the
hOISt

32
The
transmISSIon
can
now
be
freed

by
re

movmg
the
bolts

holdIng
the
clutch

assembly
to

the

flywheel
housing
and

movmg
the
clutch

assembly
back
to

dIsengage
the
dnve
shaft

splmes

33
Witlltlie

engIne
removed

carefiillyinspect

the

mountIng
Insulators
for

SIgnS
of

damage
or

detenoratIon

Replace
them
1f

necessary

ENGINE
DISASSEMBLY

ThIS
sectIon
covers

dIsassembly
of
the

engine

once
It
has
been

removed
from
the
vehIcle
All

steps
would
be
followed
for
a

complete
engme

overhaul
But
smce

many
of
the

procedures
can

be
done
WIthout

removing
the

engIne
from
the

velucle
a

complete
course
of
actIon
should
be

decided
on
before
needless
removal
and
ms

assembly

Mount
the

engme
on
a
stand
or
other
sUItable

work
surface
before

msassembly
Thoroughly

clean
the
extenor
WIth
steam
or
solvent

CAUTION

Remove

the
alternator
starter
motor

carburetor
and
dIStributor

from
the

engine
before

cleaning
to

prevent

damage

Once
clean

mspect
the

engme
for

SIgnS
of

damage
or

mlssmg
parts
cracks
or
accumulated

rust
on
the
block

especIally
around
the
soft

plugs
cracks
In
the
clutch

housing
and
dents

or
cracks

In
the
oil

pan

DISassemble
as
follows

Alternator
Removal

1

Figure
14
shows
the

positIon
of
the
alternator

on
the

engme
and
a
VIew
of
the
alternator

mountIng
parts
Remove
the
two

bolts
lock

washers
and
shmls

holding
the
alternator
to
the

adjustIng
bar
and
the

adjustIng
bar
to
the

engme

block

2
Remove
the
two
bolts
and
lockwashers

hold
ing
the
alternator
to
lower

mounting
bracket

3
Remove
the
alternator
and

mountmg
brack

ets

Starter
Motor
Removal

1
Remove
two

mountIng
bolts
and
lockwashers

holdmg
starter
motor
to
clutch

housmg

2
Pull
starter

assembly
toward
front
of

engme

and

remove

Distributor
Removal

1
Scnbe

ahgnment
marks
on
the
mstrlbutor

shaft
tl
ie

ihsthDutor
mountmg
oracket
anihlfe

front
cover
so
that
the
dIStnbutor
can
be
re

placed
accurately
later

2
Remove
two
bolts
and
lockwashers

holdIng

the
dlstnbutor

mountmg
housmg
to
the

front

cover

3
Pull

up
on
the
dlstnbutor
and
remove
it

as

a
unit

Carburetor
Removal

1
Remove
the
four
nuts
and
lockwashers

join

mg
the
carburetor
and
mtake
manifold
then

remove
carburetor

Oil

Pump
Removal

1
Remove
the
four

mountIng
bolts
and
lock

washers

2
WIthdraw
the
011

pump
assembly
from
tht

front
cover
as
shown
m

Figure
15

@

Air

Pump
Removal

1
Remove
the
bolt

passmg
through
the
slot
on

ENGINE

@
41

I
t

43

44

45
46

49

48

47
46
45
43
44

38
39

37
Alternator
bracket

38
Hex
bolt

39
Hex
bolt

40
Lock

spring
washer

41
Bracket
shim

42
Adjusbng
bar

43
Hex
bolt
44
Hex
bolt

45
Lock

spnng
washer

46
Rat
washer

47
Voltage

regulator

48

Phillips
screw

49

Spring
washer

4Z
CHAPTER
SIX

the

adJustmg
bar
mto
the

mountmg
flange
of
the

arr

pump

2
Remove
the
bolt

lInking
the

arr

pump
to
the

mountmg
bracket
and
remove

pump

3
The
bracket
has
four
bolts
to
the

engme
the

adJustmg
bar
mounts
on
the
front
cover
WIth
two

bolts
Remove
these

to
free
the
front
cover

Water

Pump
Removal

I
Remove
the
bolts
and
lockwashers

Jommg

the
water

pump
to
the
front
cover
The
number

of
bolts
vanes
from

year
to

year
due
to

pump

aesign
clianges
Remove
water

pump

Fuel

Pump
Removal

I
Remove
the
two
nuts
and
lockwashers
secur

mg
fuel

pump
to
the

engIne
and
remove

pump

Rocker
Arm
COYer
Removal

I
Remove
SIX
bolts

holdmg
rocker
arm
cover

to
head
and
lIft
off
cover

Intake
and
Exhaust
Manifold
Removal

I
Remove
eleven
nuts
and
lockwashers
that

secure
the
mtake
and
exhaust
manIfolds

2
Remove
mtake
and
exhaust
manIfolds
as

shown
in

Figure
16

Thermostat
and
Water
Inlet

Housings

1
Remove
two
bolts
and
lockwashers

secunng

thermostat

housmg
to
head
Remove

housmg
as

shown
m

Figure
17
@

2
Remove
two
nuts
and
lockwashers
from

top

of
thermostat

housmg
to

gam
access
to
thermo

stat

3
Remove
two
bolts
and
lockwashers
that
hold

water
mlet

housmg
to
front
cover
and
lIft
off

housing

Front
Cover
Removal

1
Remove
bolt
and

washer
from
center
of
crank

pulley
Pulley
tool
Will
be

necessary
for
removal

from
crankshaft

2
Remove
nme
bolts
and
lockwashers

holdmg

front
cover
to

cylInder
block
then
remove
cover

as

shown
m

Figure
18

@

Chain
Tensioner
and
Drive
Chain
Removal

I

Figure
19
shows
the
camshaft
dnve

mechan

Ism
Remove
the
two
bolts
and
lockwashers
010

ENGINE

43

@

0
00

o

mg
the
cham

tenslOner
to

the
block
to

free
the

sprIng
loaded

tenslOner

assembly

2
Remove
the
four

bolts

and

lockwashers
hold

mg
the
left
and

rIght
sIde

cham

guides
to
the

cylmder
block

Remove
the

guIdes

3
On

the
front

of
the
camshaft

remove

the
bolt

and

lockwasher

holdIng
the
fuel

pump
cam
as

sembly
and
the

eam

sprocket
to
the
eam

4
LIft

the
drIve

chaIn
asIde

and

remove
the

earn

sprocket
and
fuel

pump
cam
from
the

cam

shaft

as
shown

In

Figure
20

5

Remove
the
dnve
cham
from
the
crankshaft

drIve

spr6cket

Cylinder
Head
Removal

NOTE
Removal

of
the

cylinder
head

requires
a

special
tool

identified
as

DatsunST49010000
and
is

shown
In

FIGURE
21
@

I

USIng
the

specIal
tool
or

eqUIvalent
remove

ten
bolts
and

washers

holdIng
cylinder
head
to

cyhnder
block

See

Figure
22

2

Remove
head
from

block
and
dtscard

gasket

Oil
Pan
and
Strainer
Removal

I
Invert
the

engme
remove
22
bolts
and
wash

ers

secunng
pan
to
block

and
remove
011

pan

On

automatIc
transmission

models

tpe
pan
bolts

also
hold
the

oIl
cooler
hose
and
tube

clamps
in

place
DISCard

011

pan
gasket

3

Figure
23

shows
the
oIl
stramer

mOlJ
lted
m

the
block

Remove
two
bolts
and
washers

for

dISassembly

Crankshaft
Removal

I
Use
a

gear
puller
as

shown
III

Figure
24

to

pull
the
oIl
thrower

crankshaft
worm

gear
and

drive
cham

sprocket
from

the
crankshaft

The

above

parts
are
held
In

place
by
three

woodruff

keyS

2

DISconnect
the

pIston
and

connectrng
rod

assemblIes

from

the
crankshaft

by

removing
the

44
CHAPTER
SIX

@

@

eight
connecting
rod
bolts
Remove
the
four

bottom

caps
along
with
assoc1ated
rod

beanngs

as
shown

m

Figure
25
Be
certain
to

identify

each

part
for

later

reassembly
on

the
correct

rod

3

Gently
push

up
each

connecting
rod
into

the

cylinders
far

enough
to

clear
the

crankshaft
Do

not

push
them

up
so
far
that
the

piston
rings
hit

the

ridge
at
the

top
of

the

cyImders
Remove
the

upper
beanngs
and

identify
for
later

reassembly

4
Remove

the
five
bolts

holding
the

flywheel

to
the

crankshaft
as
shown
in

Figure
26
For

models
Wlth
automatic
transmisslOn
there

is
a

convertor

plate
in
front
of
the
drive

plate
fly

wheel
and
a
crankshaft

plate
m

back
of
the

drive

plate
also

attached

by
the
five
bolts

5
Remove
bolts
from
front
main

bearing
cap

and
three
center
main

bearings
Identtfy
caps

and

beanngs
for

reassembly
@

NOTE
Removal

of
the
rear
mam

bearing

requires
the
use

of
a

specuzl

tool
ST4463000D
shown
in

f
Q

URE
27

6
Remove
the
rear
mam

bearing
cap
as
shown

in

Figure
28

7
Remove
the

rear
011

seal
as
shown
m

Figure

29

8
Remove

crankshaft
from

cylinder
block

9
Remove

and

1dentify
the
mam

beanngs
from

the

cyhnder
block

JOurnals

ENGINE
45

@

@

10
Remove
the
baffle

plate
and
steel
net
as

shown
in

Figure
30

11

Carefully
remove
the

connecting
rods
and

pIStons
from
the

cyhnders
by
pulling
them
out

of
the
bottom
of
the

cyhnder
block
@

12

Inspect
all

parts
for

signs
of

damage
or

wear

Repau
or

replace
as

reqUIred

PISTON
AND

CONNECI1NG

ROD
DISASSEMBLY

1
Remove
the

piston
nngs
from
the

pistons
as

shown
m

Figure
31

t
p

t

r
d

2
Removal
of
the

pISton
pms
from
the

pIStonS

and

connecting
rods

requires
the
use
of

a

press

and
tool
ST4484000D

CYLINDER
HEAD

DISASSEMBLY

I
Remove
the
valve
rocker

springs
that
are

looped
over
the

top
of
the
rocker
arms

2
Loosen
the
valve
rocker

pivot
lock
nut

and

remove
the

rocker
arm

by
pressing
down
the

valve

spnngs
on
each
valve
Take
care
not
to

lose
the
valve
rocker

gwdes
located
between
the

end
of
the
valve
stem
and
the
rocker
arm