DATSUN B110 1969 Service User Guide

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

Bneine

Remove
the

011

pan
and
011
straIner

Remove

the

tImIng
chaIn

cover
and
the
chaIn

tenSlOner

Remove
the

crankshaft
and
camshaft

sprockets

together
WIth
the

timing
chaIn

Fig
21

Tlmmg
cham
cover

removal

I

FIg
22
PIston
and

connectmg
rod

assembly
removal

Fig
23
Rear

011
seal
removal
Rotate

the

engIne
a

quarter
turn
and

remove

the

piston
and

connectIng
rod

assembly
Take

off
the

connectIng
rod

beatings
at
the

same

tIme
and

keep
them
In

order

Rotate
the

engIne
a

quarter
turn
and
remove

the

flywheel

Remove

the
maIn

bearIng
cap
and

the
rear
011

seal

Remove
the
crankshaft

Remove

the
baffie

plate
and

the
crank
case

net

Remove

the
camshaft

after

takIng
off

the
cam

shaft

plate

Remove

the
valve
tfter

Remove
the

piston
rIngs
With
a

tlng
remover

Press
out
the

piston
pIn
With

a

piston
pin

remover
and

an
arbor

press

Remove

the
valves

USIng
a
valve
tfter

Be
careful
not
to

lose
valve

sprIng
seat

011
seal

valve
collet
and
valve
rocker

sprIng

FIg
24
Baffle

plate
and

net
removal

Fig
25
Camshaft

plate
removal

17

Bogioe

0

WAI
CI

o

o

WAIl
Cl

I

Fig
26
Valve

components

FIg
27

Cylinder
head

Cyhnder
head
surface
flatness

Standard
MaxImum

m
m

Al2

Engme
less
than

o

0020
o
0039

INSPECTION
AND
REPAIR

Preparation

Check
the

cyhnder
head
and

cylinder
block

for

traces
of
water
leaks
before

cleaning

Clean
all

parts
to
remove
011
stains
carbon

depoSits
fur
and
other

foreIgn
matters

com

pletely

M
k

s
lr
1at
all
o
hol

Lare

clear
Blow

air
Into

them
If

reqUIred

18
Fig
28

Checking
the

cylinder
head
surface

Fig
29

CheckIng
valve
stem
dIameter

Secure

proper
assembly
carefully

Cylinder
Head

Checking
cylinder
head

mating
face

VIsually
check
for
cracks
and
flaws

Measure
the
surface
of
the

cyhnder
head
on

the

cyhnder
block
SIde
for

warping
If
It
ex

ceeds
the
hmlt
indIcated
below

regrind
afTec

ted
surface
wIth
a
surface

grinder

Valve

Assembly

Check
each
of
the
Intake
and
exhause
valve

assembhes
for

worn

damaged
or
deformed

valve

caps
and
stems
Correct

or

replace
the

valve
If

reqUIred

The
valve
face

or
valve
stem
end
surface

should
be
refaced

by

usmg
a
valve

gtlnder

Notes

a
Deflection
of
seat
surface

against
axis
should
be

0
0012
in

or
less

b

o
rr
ctnes
f

right
angle
and

out
of
round
should
be

0
0004
in

or
less

IBglne

Note
When
the
valve
head
has
been

reduced
to
0
0197
in
or
less
in
thickness

replace
the
valve

Grinding
allowance
for
the
valve
stem

end
surface
is
0

0197
in
or
less

Valve

spring

Measure
the
free

length
and
the
tensIOn
of

each

spnng
If
the
measured
value
exceeds

the

specIfied
hmlt

replace
the

sprlllg

Check
each

spnng
for
deformatIOn
with

a

square

Any
sprmgs
w1th
deflectIOn
of

0
0630

III
or

more
must
be

replaced

Valve
Rocker
Shaft
and
Rocker
Arm

Check
the
valve
rocker
shaft
and
rocker
arm

1

N
in

00

9E
22

N

o

NO

I

I
I

I

1
I
I

Ll
gE

N
cno

CX
co

00
r

o
171M

OtM
Be
22

Bo

l
N

11
lit

l

o
cnM

l
Q

1

45
30

290
to
29
2
die

1142
to

1
1501
N

I

350
to
35
2dla

1
378
to
1386

INTAKE
EXHAUST

UNIT
mm

lnl

Fig
30
The
Intake
and
exhaust
valves

Fig
31
Valve

grinder
for

seizure
and

wear
and

repair
or

replace
as

required

Valve

rocker
arm
to
shaft
011
clearance

o
0008
to
0
0020
III

Spnng
specIficatIOns

Free

length
1
831
In

Valve
closed

1

524
In
at
52
7
Ib

Valve

open

I
19
III
at
1291b

EM
J

Fig
32
Valve

spring
test

Fig
33
Valve
rocker
shaft

lB

Bn
in1l

If

camshaft

bearmg
clearance
IS
exceSS1ve

replace
the
camshaft

bearmgs
with
service

parts
When
valve
contact
surface
of
the
valve

rocker

arm
IS
worn

excessively
m

step
repair

by
means
of

a
valve

grinder
or

replace

Grinding
allowance
for
valve
contact
surface

of
the
valve
rocker

arm
IS
0
0197
In

or
less

Valve
Lifter
and
Push
Rod

Check
the
valve
hfter
for

wear
seizure
and

bevel

edge
contact
and

repair
or

replace
as

reqUIred

Measure
clearance
between
the
hfter
hole
on

the

cyhnder
block
and
valve
hfter
and

replace
the
valve
hfter
when
clearance
ex

ceeds
the
hmlt

Check
the

push
rod
for

bendmg
and

damage

and

repair
or

replace
as

reqUIred

Camshaft
and
Camshaft

Bearing

Measure

mner
dIameter
of
the
camshaft

bearing
and
outer
diameter
of
the
camshaft

Journal

Standard
MaxlIDum

m
m

Valve
hfter

hfter
hole
o
0059

o
0008
to
0
0020

clearance

limit
0151010
00059
m

Standard
003
to
0071010

00012
to
00027
m

Fig
34
Camshaft

bearing
check

20
Valve

Timing

If
the
camshaft
has
no

apparent
damage

although
some
valve
troubles
have
been
detec

Standard
Wear

hm1t

1st

00015luOO024

2nd

00011
to
0

0020

Ot

3rd

clearance

00016
to
00025
o
0059

In

4th

00011
to
0

0020

5th

00015
toO
0024

1st

1
7257
to
I

7261

Inner
2nd

1
7050

to
1

7060

diameter
of

camshaft

3rd

beanng
1

6865
to
1

6868

m

4th

I

6663
to
I

6667

5th

1

6243
to
1

6247

TDC

DIRECTION

OF

ROTATION

EXHAUST
INTAKE

BDC

Fig
35
Valve

timing
diagram