1968 DATSUN 510 engine

26

CHAPTER

FOUR

2
Check
all
belts
hoses
and
fuellmes

Replace

If

reqUIred
Check
the
tensIon
of
the
belts
for

the
au

pump
and
the
alternator

Adjust
as
re

qUIred
Normal
deflection
of
the
belts
when
pushed
m

by
hand
should
be

approXImately
0
5

m

13mm
as
shown
m

Figure
7

3

Inspect
the
011
filter
for
leaks

TIghten
or
re

place
as

necessary
The
filter
should

replaced

at
least

every
6
000
mIles

4

Inspect
the

lIlr
cleaner

for
excessIve
accumu

latIon
of
dIrt

Replace
at

least

every
24
000
miles

under
normal

operatmg
cornhtIons

5

Carefully

mspect
the

water

pump
and

the

radIator
for

SIgnS
of

leaks

Repair
as

necessl
i
y

6
Check
the
emissIoo
control
deVice
If

so

eqwpped
Refer

to

Chapter
Ten
for

checks
and

tests

to
be
made

c

1

7
Check

engine
oIl

Replems
9
or

replace
as

reqUIred

8
Check
the

level
of
the
brake

fluid
m

the
brake

and

clutcJ1
master

cylmder
reservOirs

ReplenISh

as

necessary

ii
t

d

fl

tlJ

l

f

CH
APTER
FIVE

I

f

I
t

p

ENGINE
LUBRICATION
SYSTEM

i

k

i

DESCRIPTION

The
Datsun
L16

engme
uses
a

pressure
feed

011

system
Figure
1
Illustrates
the
flow
of
the

engine
011

Refer
to

Chapter
Two
for
the
re
om

mended

type
of
011
and
the

frequency
that

chang

mg
IS
recommended
LUBRICATION
CIRCUIT

OlliS
drawn
from
the
011

pan
through
the
mlet

screen
and
tube
to
the
mlet
side
of
the
011

pump

011
flows

through
the
outlet

portIon
of
the
011

pump
and
the
011

gallery
to
the
mlet
side
of
the

011
filter
and
then
to
the
maID

gallery
The
mam

CD

N

4
r

I

28

CHAPTER
FIVE

011

gallery
supphes
011
to
the
crankshaft
mam

beanngs
Dnlled

passages
m
the
crankshaft

direct
oil
from
the

mam

bearings
to
the

con

nectmg
rod

beanngs
011

mJected
from

jet
holes

in
the

connectIng
rods

IS
directed

to
the

cylmder

walls
and

piston
pins
0U
dlstnbuted
from
the

mam

gallery
enters
the
cham
tensioner
The

pad

IS
held

against
the
cham

by
011

pressure
and

spnng
tension
The

tmung
chain
receives
011

through
the

Jet
located
near
It

LubncatIon
IS

supphed
to
the

cyhnder
head

mam
011

gallery
through
the
crankshaft
center

beanngs
Camshaft

beanngs
on
the

cyhnder

head

are
fed

directly
from
the

cyhnder
head

mam

gallery
The
rocker

arms
and
valves
are

lubncated

intermittently

by
the
camshaft
011

gallery
and
the

small
channel
at
the
base
CIrcle

portIon
of
each
cam
OllIS

supphed
to
the
cam

shaft
011

gallery
through
the
No
2
and
No
3

camshaft

bearings

OIL
PUMP

The
011

pump
IS
mstalled
m
the
bottom
of

the

front
cover
as
shown
in
2
The

pump
is

held
m

place
by
four
bolts
to
the
front
cover
It

IS
a
rotor

type
dnven

by
the
011

pump
spmdle

whIch
IS
dnven
off
of
the
crankshaft
Pressure
IS

regulated
by
a
valve
shown

m

Figure
3
A
slot

at
the

top
of
the
dnve
rotor

engages
a

dog
clutch

at
the
lower
end
of
the
distnbutor
dnve
shaft

assembly
The

011

pressure
rehef
valve

IS
not

adjustable
In
the
released

pOSition
the
valve

pernnts
011
to
be

by
passed
through
a

passage
on

the

pump
cover
to
the
mlet
Side
of

the

pump

CD
CD

Oil

Pump
Removal

1
Remove
the
dIStnbutor
from
the

top
of
the

front

cover
Make
certam
to
mark
the

posItIon

of
the

dtstnbutor
relative
to
the

front
cover
so

that

It
can
be

replaced
m
the

same

posItIon

2
Drain
the

engme
od

3
Remove
the
front
stabIhzer
from
the
bottom

front
of
the

engme
compartment

4
Remove
the
front

splash
shIeld
from
the
bot

tom
front
of
the

engine
compartment

5
Remove
the
bolts

holdmg
the
oil

pump
to

the

front
cover
Remove
011

pump
and
drive

gear

spmdle
from
the
front
cover

Disassembly
Inspection
Repair
and

Assembly

Figure
4
IS
an

exploded
VIew
of
the
011

pump

assembly
Refer
to
the

figure
and
the

accom

panymg
index

1

Separate
the

body
cover
from
the

011

pump

body
by

unscreWIng
the

secunng
bolt

2
Remove
the

pump
dnve
mechamsm
and

dnver

gear
from
the

pump
body
Clean
the
dIS

assembled

parts
m
a
suitable
solvent

3

Inspect
for

Signs
of
wear
or

damage
Reparr

or

replace
as

necessary

4

Inspect
the
drive
rotor
shaft
for

excessive

wear
or

sconng
Check
the

followmg
clearances

a
Side

clearance
between
mner
and
outer

rotor
00020
to
00047
m
005
to

0
12mm

b

Tip
clearance
0
0492

m
0
12mm

c
elearance
between

outer
rotor
and

body

00059

to
0
0083
in
015
to
0
21mm

5
Check
the
relief
valve

spring
dtmenslOn
to

ensure
that
It
has
not
lost
tension

Free

length

should
be
2
24

m
57mm

Compressed

length

30
CHAPTER
FIVE

should
be
1
54
m
39mm
If
the

spnng
tension

is

accurate
the
rehef

valve
should

open
at
54
0

to
59
7
lb

1m
3

8
to
4
2

kg
cm

6
Reassemble
the
oil

pump
Make
certain
all

gaskets
are
mounted
flat

to
avoid
leaks

7
Install
the
dnve

spindle
and
the
oil

pump
to

the
front
cover

8
Install
the
distnbutor
in
the
same
relative

locallon
from
which
it
was
removed
If
the
num

ber
1

cyhnder
was
at

top
dead
center
on
the

compression
stroke
the

punch
mark
on
the
dnve

spindle
should
face
toward
the
front
of
the

engine

9
Install
the
front

splash
shield
and
the
front

stablhzer

10

Insert
the
drain

plug
in
the

pan
and
refill

the

engme

11
Oil

pressure
at
idle
should
be
142
to
17
1

lb

lin
1
0
to
1
2

kg
cm

12

Tlghtenmg
torque
values
for
the
oil

pump

mounting
bolts
is
10
8
to
152ft
lb
1
5
to
2
1

kg
m
and
21
69
to
25
31
ft
lb
3
0
to

25

kg
m

for
the
release

valve

cap
nut

Oil

Filter

The
oil
filter
is
mounted
on
the

nght
hand
side

of
the

cyhnder
block
It

IS
a

cartndge
type
with
built
m

gasket
and
threads
onto
the

mounting

spindle
The
filter
should
be

replaced
every

6
000
miles
as
follows

1
Dram
the

engme
oil
Walt
10
15
minutes

before

removmg
oil
filter

to
allow
It
to
dram

2

By
hand

or
with
the
aid
of

an
oil
filter

wrench

unscrew
the
filter
from
the

spmdle
as

shown

m

Figure
S

3

Cleanmg
of
the

oil
filter

IS
not
recommended

Rather

replace
It
as

reqUIred

4
Thread
the
new
oil
filter
onto
the

mounting

spindle
by
hand
Do
not

overtighten
or

leakage

nught
occur

CHAPTER
SIX

ENGINE

Datsun
510
and
521
veJucles
use
the
L16

engme
Over
the

years
the

deSign
remamed

essentIally
the
same
with
nunor

changes
made

to
accommodate
drlIerent
elIDSSlon
control
de

VIces

The
Ll6
IS
a
four
cylmder

overhead
cam

shaft

engme
With
a
97
3
cubic
mch
1595cc

dISplacement
Cylmder
bore
IS
3
2677
in

83mm
stroke
IS
2
9016
m
73
7mm

Output

IS
96

horsepower
1972
mode1s
92
horse

power
at
5
600

rpm
Compression
ratIo
is
8
5

to
1

Equipment
includes
a

single
two
barrel

Hltaclu
carburetor
an
HItachi
alternator
an

HItachi
starter
motor
and
either
a

smgle
point

or
dual

pomt
distnbutor

Figure
1
next

page
IS

an
overall
view

of
the

engme
Figure
2
next

page
is
a
sectIonal
view
The

following

para

graphs
describe
and
illustrate
the

major
com

ponents
of
the

engine
and

provide
detaIled

InStructIons
on
the

removal
disassembly
inspec

tIon

reparr
and

reassembly
of
the

engine

CYLINDER
BLOCK

The

cylmder
block
is
shown
in

Figure
3A

Figure
3B

page
33
IS
an

exploded
view
of
the

block
and
associated

parts
CRANKSHAFI

The
crankshaft
F

JgUre
4A
is
made
of

forged

steel
and
has
a

high
capacity
balance

weight

Figure
4B
shows
the
crankshaft
and

pISton
as

semblies
m
an

exploded
VIew

DA

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