1969 DATSUN B110 Service Repair Manual

aintenIDce
une

up

Find
the
cause
for

necessary
corrective

action

b
Oil
with

extremely
low

viscosity
in

dicates
dllutton
with

gasoline

Check
011
level
If
found
below
L
mark
refill

to
H
mark
on

gauge

OIL
FILTER

The
011
filter

IS
of

a

cartndge
type

Check
for
011
leaks

through
gasketed
flange
If

any

leakage
IS
found

retIghten
shghtly
If

nece

sary
replaLe
filter
as

an

assembly

When

mstalhng
an
011
filter

tIghten
by
hand

Note
Do
not

overtighten
011
fIlter

or
oil

leakage
may
result

I

I
Fig
3

Checking
engine
011
level

Oc
OF

I
0
121

20141

30
21

401401

5015BI

I

EGOQl

I
10
20

Fig
4

Protection
concentration
COOLANT

L
L
C

IS

al
ethylene
glycol
base

product
con

tammg
chemical
mhlbltors
to

protect
the

coohng
system
from

rustmg
and
corrosIOn

The

L
I
C
does
not
con
tam

any
glycerme

ethyl
or

methyl
alcohol
It
wIll
not

evaporate

or
bOll

away
and
can
be

used
wIth
either

high

or
low

temperature
thermostat
It
flows

freely

transfers
heat

effiCiently
and
will
not

clog
the

passages
m

the

coohng
system
The
L
L
C

must
not
be
mIxed
wIth
other

products
ThiS

coolant
can
be
used

throughout
the
seasons
of

the

year

Whenever

any
coolant
IS

changed
the

coohng

system
should
be
flushed
and

refilled
wIth
a

new
coolant

Check
the
level

COMPRESSION

Compression
pressure
test

Note
To
test

cylinder
compression

remove
all

spark
plugs
and
hold

tester
fit

Percent
BOllIng
pomt

concen
09

kg
cm2
Freeze

tra
lion
Sea
level

coolmg
sys

protectIon

tern

pressure

30

2210F
2550F
50f

50

2280
F
2610F
31oF

ETO
104

Fig
5

Testing
compressIon
pressure

7

aiDtenaDce
TUDe

up

ting
tightly
m

spark

plug
hole

of
a

cylin

der

The
tester
is
used
to
determme
whether

cylinder
can
hold

compression
or

whether

there
IS
excessive

leakage
past

rings
etc

Test

compressIOn
wIth

engme
warm
all

spark

plugs
removed
and
throttle
and
choke
valve

opened
No

cyhnder
compressIOn
should
be

less
than
80
of

highest
cyhnder
s
Excessive

variatIOn
between

cyhnders
accompamed
by

low

speed
missing
of
the

cyllndel
usually
10

dlcates

a
valve
not

properly
seating
or
a

blOken

pIston
ring
Low

preSsures
even

though
umform

may
indIcate

worn

rings

ThIs

may
be

accompamed
by
excessive
011

consumptIOn

Test
Conclusion

If

one
or
more

cyhnders
read

low

Inject
about

one

tablespoon
of

engine
011

on

top
of
the

plstons
In

low

readmg
cyhnders
through

spark

plug
hole

Repeat
compressIOn
check
on

these

cy
II
nders

If

compressIOn
Improves

conSiderably
piston

rings
are
defectIve

If

compressIOn
does
not

Improve
valves

are

stIcking
or

seatIng
Improperly

If
two

adjacent
cyhnders
mdlcate

low
com

pressIOn
and

mjectmg
011

on

pistons
does
not

Increase

compreSSIOn
the
cause

may
be
a

cylInder
head

gasket
leak
between

the

cyhn

ders

Engine
011
and
coolant
In

cylInder
could

result
from
this

problem

CompressIOn
pressure

178
to
206

pSI
at
350

rpm

BATIERY

Check

electrolyte
level
10
each

battery
cell

Unscrew

each
filler

cap
and

Inspect
flUId

level
If
flUId

level
IS
low
add

dIstilled
water

to

bring
level

up
to

approximately
03937
to

07874
In
above

plates
Do
not

overfill

Mea
ure

P
illL
gravlty
of

pattery
el

c

trolyte

8
Clean

top
of

battery
and
terminals
With
a

solutIOn
of

baking
soda
and
water
Rinse
off

and

dry
WIth

compressed
atr
The

top
of
bat

tery
must
be
clean
to

prevent
current

leakage

between

terminals
and
from

poSItive
termlndl

to
hold
down

clamp

In
additIOn
to

current

leakage
prolonged
ac

cumulatIon
of
aCId
and
dirt

on
the

top
of
bat

tery
may
cause

bhstenng
of
the
material

covering
connector

straps
and
corrOSIOn
of

straps
After

tightening
terminals
coat
them

With

petrolatum
vasehnel
to

protect
them

from

corrosIOn

IGNITION
TIMING

Check

spark

plugs
and
dIstributor
breaker

pOints
for
conditIon

I

I

Thoroughly
wipe
off
dIrt
and
dust
from

tlmmg

j

marks

on
crank

pulley
and
front

cover

Warm

up
engine

suffiClently

PermIssIble
Full

charge
value

value
at
68OF

Fngld
chmates
Over
1
22

128

TropIcal
chmates
Over
I

18
123

Other
clunates
Over
1

20
126

j

J

I

ET002

Flg
S

Gheckmg
the

speCific
gravity
of

baltery
elec

trolyte

f

l

aiDteDaDce
UDe

up

Install
a

timing
lIght
on
No
1

cyhnder
spark

plug
WIre
and
Install
a
tachometer

Set

Idhng
ipeed
to

approximately
800
rpm

Check

19mtlOn
tImmg
If
It

IS
50BTDC
Before

Top
of
Dead
Center

by
the
use
of

tlmmg

hght

If

necessary
adjust
It
as
follows

Loosen
iet

screw
to
such
an
extent
that

dlstnbutor
can
be
moved

by
hand

AdJu
it
IgmtlOn
tIming
to
50BTDC

Lock
dlstnbutor
set
screw
and
make
sure

that
tlmmg
IS
correct

IgnitIOn
tImmg
degreel
50
B
T
DC

Distributor
Breaker
Point

Check
dlstnbutor
breaker

pomts
for
abnormal

pItting
and
wear

Replace
If

necessary
Make

wre

they
are
In
correct

ahgnment
for
full
con

tact
and
that

pOint
dwell
and

gap
are
correct

Clean
and

apply
dlstnbutor

grease
to
cam
and

WIck

Note
Do
not

apply
grease
excessively

Dl
tI
IbutOl

POint

gap
0
018
to
0
022
In

Dwell

angle
49
to

55

degrees

Condenser

Clean
outlet
of
condenser
lead
WIre
and
check

for
loose
set
screw

RetIghten
If

necessary

Check
condenber

capacIty
With
a

capacity

meter

Fig
7

Checking
Igmllon
timing
Condenser
msulatlOn
resistance

may
be
also

checked

usmg
a
tester

by
adjusting
ItS

range

to
measure

large
resIstance
value
When
con

denser
IS
normal
the
tester

pomter
swmgs

largely
and

rapidly
and

moves

gradually
back

to
the
Infimte
SIde
When
the

pomter
does
not

stay
still
or
It

pomts
zero
m
reSIstance

replacement
IS

necessary

Condenser

capacIty

022

J
F
MIcro
Farad

Condenser
InsulatIOn
resIstance

5
Mn

Mega
ohms

Spark
Plugs

Remove
and
clean

plugs
In
a
sand
blast

cleaner

Inspect
each

spark
plug
Make
iure

that

they
are
of
the

specified
heat

range
In

ipect
msulator
for
cracks
and

chIps
Check

both
center
and

ground
electrodes
If

they
are

excessIVely
worn

replace
WIth
new

spark

plugs
File
center
electrode
flat
Set
the

gap
to

0031
to
0035
m

USIng
the

proper
adjustIng

tool

Tighten
plugs
to
11

0
to

150
ft
Ib

torque

CARBURETOR

Idle
mixture

adjustment
requIres
the
use
of
a

CO
meter
When

preparIng
to

adjust
Idle

mixture
It

IS
essential
to

have
the
meter

thoroughly
warmed
and
cahbrated

Warm

up
the

engme
suffiCiently

ContInue

engIne
operatIOn
for
one
mmute

un

der

ldhng
speed

I

i

I

I

I

I

I

I

ETOQ4

Fig
8
Checking
dlstnbutor

POint

gap

aiDteDaDce
UDe

up

Adjust
throttle

adjusting
screw
so
that

engme

speed
1S
800

rpm
m
N

positIOn
for

automatic
transmIssIOn

Check

IgnitIOn
tlmmg
If

necessary
adjust
1t
to

the

specIficatIOns

IgnitIOn
timing
50
800

rpm

Adjust
Idle

adjusting
screw
so
that
CO

percen

tage
IS
1
5
t0
5
ff

Repeat
the

adjustments
as
desctlbed
In

steps

3
above

so
that
CO

percentage
IS
15
t0
5
ff
at

800

rpm

Cautions
a
On
automatic
transmission

equipped
model
check
must
be
done
in

the
D

position
Be

sure
to

apply
parking

brake
and
to

lock
both
front
and
rear

wheels
wIth
wheel
chocks

b
Hold
brake

pedal
while

stepping
down

on
accelerator

pedal
Otherwise

car
will

rush
out

dangerously

On
automatic

transmISSIOn

eqUIpped
model

make
sure
that
the

adjustment
has
been
made

wIth
the
selector
lever
In
N

posItion

And
then
check
the

specificatIOns
with
the

lever
In
D

posItion
Insure
that
CO

percent

and
Idle

speed
are
as
follows

Idle

rpm
650
Idle
Limiter

Cap

CO

percentage
Do
not

remove
this
Idle
hm1ter

cap
unless

necessary
If
this
Unit

IS
removed
It

IS
I

with
lever
In

D

PoSitIOn
1

5
t
0
5
k

necessary
to
re

adJust
It
at
the
time
of
In

If

necessary
adjust
by
progIesslvely
turmng
stallatlon
To

adjust
proceed
as
follows

throttle

adJustlng
screw
and

Idle

adJustmg
Make
sure
that
the

percentage
oLCO
contents

screw
until
correct

adjustments
are
made
satisfies
the

specifications
I

I

I

I

J

Fig
9
Checking
spark
plug

gap

10
Throttle

sdJustlnl

screw

Idle

adjust

Inlscrew

Idle
Itmlttc

r

cap

4

Stopper

Fig
10
Throttle

adjusting
screw
and
Idle

adjusting

screw

CARB
STOPPER

Fig
11

Setting
Idle
limiter
cap

Notes
a
Do
not

attempt
to

screw
down

the
idle

adjusting
screw

completely
to

JI
avoid

damage
to

the

tip
which
will
tend

to
cause
malfunctions

b
After
idle

adjustment
has
been

made
I

shift
the
level
to
N

or
P

position
for

automatic
transmission

c
Remove
wheel
chocks
before

startmg

the
car

aiDtenuce

TUDe

up

Fig
12

Fuel

strainer

Install

Idle
hmlter

cap
m

posItion
makmg

sure
that
the

adJustmg
screw
can
further
turn

rotatIOn
m

the
CO
RICH

d1rectlOn

Dash

Pot

Automatic

Transmission
Model

Only

Check

operation
of
dash

pot
It

should
not
be

cracked
or
bound

It
IS
also
essenttal
to
check

r
w
be

certam

that
It
IS

m
correct

adjustment

Check
to
be
sure

that
dash

pot
contacts

stop

per
lever

when

engme
speed
reaches
1

900
to

2

000

rpm

Engme
should

be

slowed
down

from
3
000
to

1

000

rpm
within

a
few

seconds

Readjust
dash

pot
or

replace
It

with
a
new

one

lflt

falls
to

meet
the

above
condItions

Carburetor
Return

Spring

Check
throttle
return

sprmg
for
sign
of

damage
wear
or

squareness
Discard

spring
If

found
wIth

any
of
above

excessIvely
beyond

use

Fuel

Filter

Check

for
a

contammatlOn
element

water

depoSIt
and
defection

All

engmes
use
a

cartridge
type
strainer
If
1t

IS
found

to
be

defective

replace
as
an

assembly

u

IQgiDe

DESCRIPTION

The
A12

engme
IS
a
715

cu
m
In
I

me
over

head
valve
four

cyltnder
engine
with

2874
m

bore

and
2
765
m
stroke
It
feature

full

opened
wedge
shaped
combustIOn
cham

ber
alummum
heads
and

fully
balanced

5

bearmg
crankshaft
to
turn
out
smooth

dependable
power

REMOVAL

Removmg
hood

Open
the
hood

remove
four
mstallatlOn
bolts

and
remove
the
hood

Disconnect
the

battery
cable
from
the
ter

mmal

Removmg
radIator
Dram
water
from
the
radiator
disconnect
two

radIator
hoses

remove
four
radIator
m

stallatlOn
bolts
and

remove
the
radiator

Removmg
cables
and
hoses

Disconnect
the

followmg
cables
hoses
and

wires

High
voltage
cable
between

Igmtton
COlI
and

distributor

Cable
to
the
thermal
transmitter

Cable
to
the
011

pressure
sW1tch

Cable
to
the

primary
Side
of
the
distributor

Cable
to
the

startmg
motor

Fuel
hose

Cable
to
the

alternator

Heater
hose
for
model
With
heater

only

I

Fig
13
Sectional
view
of
A

12
Engine

It

Bngine

WIres
for
accelerator
and
choke
The

operatIOn
Will
be
carned
out
more

easily
by

removing
the

a1r
cleaner

Lift

up
the

engine
toward
the
front

INST
ALLA
TION

Install
the

engine
In

reverse

sequence
of

removal

Disconnecting
clutch

wire
on

nght
hand
dnve

model
On

left
hand
dnve
model
disconnect

hydraulIc
line
from
the
clutch
slave

cylInder

DIsconnect
the
clutch
WIre
at
the

JXlrtlOn
of
the

wIthdrawal
lever

Remove
the
exhaust
front
tube

Disconnect
the
the
cable
to
the
back

up

lamp

SWItch

D1sconnect
the

speedometer
cable

Remove
the

propeller
shaft

Remove
four
bolts
used
In
the
differential

carner
SIde
and
Withdraw
the

propeller
shaft

Remove
the
shift
lever

Model
With
remote
control
shIft
lever

Disconnect
the
remote
control
rod
at
the

JXlr

tlOn
of
transmiSSIOn
outer
lever
and
remove

the
remote
control
rod

Model
With
floor
Sh1ft
lever

Remove
the
boot
WIthdraw
the
lock

pin
and

remove
the
lever
The

operatIOn
IS
carned
out

In
the

passenger
compartment

Model
With
automatic
transmiSSIOn

Remove

pinS
from
both
ends
of
the
cross
shaft

and
remove
the
shIft
rod

Suspend
the

engine
With
wire

Remove
the
front

engine
mounting
installation

nuts

Remove
the
rear

engine
mounting
installation

nuts

When

removing
the

engine
mounting
in

stallation
nuts
be
sure
to

apply
a

Jack
beneath

the
transmiSSIOn

CLEANING
AND

INSPECTION

Clean
the

engine
thoroughly
before
disassem

bly
Before

cleaning
the

engine
remove
the

l
electncal

parts
and

plug
up
the
carburetor

air
horn
to
aVOid
intrusIOn

of

foreign
matter

The

engine
extenor

Check
the
covers
and

bolts
for

breakage
rust

damage
and
loss

CylInder
block
Check

thoroughly
the
water

Jacket
for
cracks
and

breakage

Clutch

hOUSing
Check
for
cracks

011

pan
Check
for
excessive
rust

DISASSEMBLY

Mount

engine
assembly
on

engine
stand

Remove
the

engine
mounting
bracket
R
H

Side

Install
the

engine
attachment

Mount
the

engine
on
the
stand

Fig
14011

pump
removal

Fig
15
Thermostat

hOUSing
removal

II

Bngine

Remove
the
altel
nator
and

engine

mounting

bracket

L
H
slde

Remove
the
crankshaft

pulley

Remove
the

011

pump
together
With
the
011

filtel

Remove
the

high
tensIOn
cable
wIth
the

dlstnbutor

cap
on

Remove
the

spark
plugs

Remove
the
dlstllbutor

assembly

Remove
the
carburetor

Remove
the
rocker
cover

Remove
the
thermo
itat

houslllg

Remove
the
manifolds

Remove
the
water

pump

Remove
the
fuel

pump

Fig
16
Manifolds
removal

Fig
17
Water
pump
removal

18
Remove
the
rocker
shaft

assembly
and

push

rods

Remove
the

cylInder
head

assembly

Invert
the

engine

Fig
18

Rocker
shaft

assembly
removal

7

1

l

I

h
Y
r

I
w

L
1

Fig
19
Cylinder
head
bolts
removal
sequence

o

Fig
20
011
strainer
removal

j