1969 DATSUN B110 ECU

ainteDaDee

TUDe

up

VAL
VE
CLEARANCES

Valve
clearance

adjustment
should
be
made

while

engme
IS

stationary

To

adjust
proceed
as
follows

Start

engme
and
run
It
until
It
IS
heated
to

operatIng
temperature
or
at

least
more
than

17S
of

engIne
011

temperature
then

stop

engIne

Rotate
crankshaft
to

bnng
No
1

cylInder
In

top
dead

center
on

ItS

compressIOn
stroke

Remove
valve
rocker

cover
to

gaIn
access
to

valve

operatIng
mechamsm

Adjust
valve

clearance
at

follOWing
four

pOints
while

engIne
IS
still
hot

1

Exhaust
valve
of
No
1

cylinder

2
Intake
valve
of
No
1

cylinder

3
Intake

valve
of

No
2

cylinder

5
Exham
t
valve
of
No
3

cylInder

ote

Numbers
in

parenthesis
agree
with

those
10

accompanY1Og
sketch

AgaIn
rotate
crankshaft

one
turn

so
that
No

4

piston
IS
In

top
dead
center

on
ItS

com

pressIOn
stroke

Adjust
follOWIng
valves

4
Exhaust
valve
of
No

2

cylinder

6
Intake
valve
of
No
3

cylinder

7
Intake
valve
of
No
4

cylInder

8
Exhaust
valve
of
No
4

cylinder

Rg
1

AdJustmg
valve
clearance

8
Adjustment
should
ue
made
whIle

engIne
IS

hot
After
all
valves
have
been

adjusted

correctly
tighten
lock
nut

firmly
to
secure
the

adjustment

Checking
and

adjusting
drive
belt

Check
for
a
cracked

or

damaged
V
belt

Replace
If

defective

Adjust
the
belt
tenSIOn
If

necessary
Belt

deflectIOn
when
thumb

pressure
of
220
Ib
IS

applied
midway
between

pulleys
0394
to

o
590
In

ENGINE
OIL

011

capacity
of

engIne

IncludIng
011
filter

Capacity

MaXimum
VB
US

gal
Imp
gal

MInimum
5IB
US

gal
III

Imp
gal

Make
sure
that

engIne
011
IS
not
detenorated

With

cooling
water

or

gasolIne
DraIn
and

refill
the
011
lf

necessary

Notes

a
A

m1lky
011
indlcates

presence
of

cooling
water

Valve
clearance

Hot
Intake

0014

In

Exhaust

Fig
2

AdJustmg
dnve
belt
tension

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

Bogine

Note

Set
the

locate

plate
so
as
the

LOWER

mark

comes
to

the

engine
bot

tom
side

Set
the

maIn

bearIngR
on
theIr

posItIOns
on

the

cylinder
block

Notes
a

The
center

bearmg
No
3

bearmg
is

a

flanged
type
for
thrust
force

b
Two

lOner

bearmgs
No
2
and
No
4

are

of
the
same

type

c
The
front

bearmg
No
1
IS
the
same

type
as
the

rear

bearmg
No
5

d

All

bearings
except
for

No
I

bearing

are

interchangeable
between

upper
and

lower

bearings

Apply
engIne
OIl
to
the

mam

bearIng
surfaces

on

both
sIdes
of
the

cyltnder
block
and

cap

Fig
53
Mam

bearing
caps

Fig
54
Crankshaft
end

play
check
Install
the

crankshaft

Install
the

mam

bearmg
cap
and

tighten
the

bolts
with

specified
torque

Tlghtemng
torque

36
to

43
ft
Ib

Notes
a

Arrange
the

parts
so
that
the

arrow
mark
on

the
bearing
cap
IS
faced

toward

the
front
of
the

engine

b
Prior
to

tightening
the

bearing
cap

bolts

place
the

bearing
cap
at
a

proper

posItIon

by
shlftmg
the

crankshaft
in
the

axial

direction

c

Tighten
the

bearmg

cap
bolts

gradually

in

separatmg
two
to

three

stages
and
out

wardly
from
the

center

bearing

d
After

securing
the

bearing
cap
bolts

ascertam

that
the
crankshaft

can
be

easily
rotated

Make
sure
that
the
crankshaft

end

play
IS

correct

Crankshaft
end

play

o
0020
to

0
0059
In

I
nstalI
the

rear
011
seal

Install
the

flywheel

securely
USIng
the

lock

washers
and

tighten
the
bolts
with

specIfied

torque

Tlghtemng
torque

47
to
54

ft
Ib

Rotate
the

engine
a

quarter
turn

and
mstall

the

piston
rod

assembly

Notes

a
Insert
the

pistons
in
the

corresponding

cyhnders

b

Apply
engine
oil
to

parts
as

required

c

Arrange

pistons
so

that
the
F
mark

on
the

piston
IS
faced
to

the
front
of
the

engine

d
Install

piston
rings
at
18
Y
to

each
other

avoIdIng
to
fit

them
In
the

thrust
and

pIston

pIn
aXial

directIOns

27

BBgiBe

Fig
70

Tlmmg
mark

Fig
71
Dlstnbutor
mstallatlon

Notes
a
Set
the
No
1

piston
to
its

top

dead
center

of
the

compression
stroke

b
Before
installation
return
the

distributor

rotqr
approximately
60

degrees
from
Its

regular
position
Insert

the

assembly
meshing
the
distributor

drive

gear
and
driven

gear

After
installation
the
distributor

rotor

should

come
into
contact
wIth
the
mark

on
the
rotor

cap
fittmg
as
shown
in
the

Figure

Install
the

spark

plugs
and
connect
the

distrIbutor
to

plug
high
tensIOn
lead

wire

Install
the
fuel
hoses
and
tubes

Install
the

clutch
cover

assembly

Install
the

engme
shngers
and
crankcase

ven

tilatIOn

hose
Fig
72

Removal
of
011
pump

TrochoId

Fig
73011

pump

OIL
PUMP

Removal

Engine
in
vehlCIe

Dram

engme
OIl

Remove
the
front
stabilIzer

Remove
the

splash
shield
board

Detach
the
011

pump

body
together
with
drIve

gear

spmdle

Disassembly

PrIor
to

dlsassembhng
check
to
determme

that
the

pump
IS
defective

Take
out

a
total
of
2
bolts

securmg
the

pump

cover
to
the

pump
body
The
outer
and
mner

Dlsmount

the

engme
from
the

workmg

stand
rotors
and
drive
shaft
can
then
be
dlsassem

Install
the

engme
mountmgs
bled

32

ApplYing
a
sUItable
wrench
or

spanner
loosen

off
the

regulator
valve

Note

a
When

placmg
the
valve
m
a
VIse

use
extreme

care
not
to
dIstort
the

pump

body
and
cover
in
the

jaws

b
Do
not

pull
out
the
drive
shaft

pin

securing
the
drIven
shaft
and
inner
rotor

The
shaft
is

press
fitted
to
the
rotor
with

the

pin
calked

Inspection
and

Repair

Clean
the
dIsassembled

parts
with

cleamng

solvent
and

Inspect
for
defects

Inspect
the
dnve
rotor
shaft
for

excessIve

wear
and
scores
and
check
the

follOWing

clearances

SIde
clearance
between
outer
and

Inner

rotors
0
0047
In

or
below

Tip
clearance
00016
to
0
0047
In

Clearance
between
outer
rotor
and

body

o

0059
to
0
0083
In

AdjustIng
Regulator

Insert
valve
In

the

body
and
measure
the

dIstance
A
from
the
valve
end
to
the

spnng

contacting
face
inside
the

plug
See

Figure
74
Bngine

1

Adjusting
h
rn

rJ
Regul
m

Valve

spnn

FIg
74

Regulator
valve

The
distance
from
the

spring

contacting
face

inSide
the
valve
to
the
valve
end
amounts
to

o

7086
m

On

inspecting
the
above
dlmenslOns
deter

mine
the
thickness
of

adjusting
shim

ShIm
thickness
A

0
7086
In

spring

length
at

compresslOn
load
809
lbs

Assembly

Assembhng
the
011

pump
IS
the

reverse
order

of

disassembly

Note
a
Be
sure
no
traces
of

grinding

chips
lint
or
dirt
remain

b
Be
sure

gasket
is

not
turned

up
and

dIscontinued

33

B1eetrical

Iptem

Removal

DIsconnect
the

battery
ground
cable

Disconnect
the
black
and

yellow
wIre
from
the

magnetic
sWitch
termmal
and
black

battery

cable
from
the

battery
termmal

Remove
two
bolts
used
to
secure
the

startmg

motor
on
the
clutch

housing
Pull
the
starter

assembly
forward
and
remove
the

starting

motor

Installation

InstallatlOn
IS
the
reversal
of
removal
Removal

Disconnect
the

negatIve
battery
termmal

DIsconnect
two
lead
wires
and
connector
from

the
alternator

Loosen
the

adjusting
bolt

Remove
the
alternator
drIve
belt

Remove
the
alternator
installation
bolt

Dismount
the
alternator
from
the
vehIcle

Installation

InstallatlOn
1S
the
reverse
of
removal

TROUBLE
SHOOTING

Troubles
Trouble
IOl
JlltHI

lartlTlg
motor
will

not

operate

No

mJgnetJl
sWltdl

operating
sound
Rdttcry

IgnitIon
sWltLh

Wiring

Starler

Magnetic
SWitch

Magnetic
SWitch

operating
sound
IS

heard
Bdttery

Wifing
CaUlies
Remedies

Defective
bclttery

Rcpldt
C

bJlh
ry

Over

dlschargmg
Measure

speCific
grJvlty

of

clcl
lrolyte
dnd

chJrge
ur

repl
H
e
the

battery

Defedlvc
lontJd
orreLl
or

replJl
c

Ig

mllun
wltdl

F
lulty

Slartmg
motor

groundlllg
CorrCl
l

F

lUlty
battery
groundmg
Corrcll

Broken
or
dlM

onncdcd
t
Jble
Carrece
or

replJt
c

Broken
dnnJture
or

field
coli
cJble

RcpldCC

Broken
brush

pig
tall

Rcpldce

Dekl
llVe
mll
3
Correcl
or

repldce

Broken
or

shorted
senes

cod

Replace

FaulIy
plunger
slidmg

RepaIr
or

replace

Over

dlschargmg
Measure

speCifiC
gravity

of

electrolyte
and

charge
If

necessary

Faulty
terminal
contact
or
loose

connectIOn
Clean
and

retighten

Faulty
B
or
M
termmal
connections

Rellghten

37

ruel
S
stem

Note
When
somewhat
over
choked
set

bl
metal

cover
after

turning
it
clockwise

slightly

Adjustment
oflnterlock
Opelntng
of

Pnmary
and

Secondary
Throttle
Values

Open
the

pnmary
Side
throttle

valve
48
from

the

fully
closed

positIOn
and
measure

clearance
GIn
between
the
throttle
valve
and

throttle
chamber
mSlde
wall
as
shown
m

Figure
99

GIn

0
228
m

WIthout

dlsturbmg
the
above

settmg
bend

connectmg
rod
as

necessary
so
that

secoridary

throttle
valve
IS
about
to

open
Upon
com

pletIOn
of
the

adjustment
make

sure
that
the

hnk

system
operates
smoothly

Dash

Pot

Adjustment
AutomatIC
Trans

mlsszon
car

only

It
IS

necessary
that
the

Idhng
speed
of

engme

and

mIxture
have
been
well

turned
up
and

engme
IS
suffiC1
n

y
warm

1

Turn
throttle

valve

by
hand
and
read

engme

speed
when
the
da
h

pot
Just
touches
the

stop

per
lever

Adjust
the

pOSitIOn
of
the
dash

pot
by
turnmg

the
nut
until
the

engine

speed
IS
In

the

range

from
1

900
to
2
000

rpm

Make

sure
that
the

engine
speed
IS

smoothly

leduced
from

3
000
to
1
000

rpm
within
a
few

econds

Removal

Remove
the

aIr
cleaner

DIsconnect
the
fuel
line
vacuum
line

automatic
choke
harness
and
antl

dlesehng

solenOId
harness
from
carburetor

Remove
the
throttle
lever

Remove
four
nuts
and
washers

retaining
the

carburetor
to
the
mamfold
If

necessary

LIft
the
carburetor
and
remove
from
the

mamfold

Remove
and
dlscard
the

gasketcused
between

the
carburetor
and
mamfold

8
Disassembly

The
main

Jets
and
needle
valves
on
both

primary
and

secondary
Sides

are
accessible

from
outSIde
of
the
carburetor
for
disassem

bly
Remove
throttle
return

sprmg

Remove

pump
level
shaft
take
out

pump

lever
and

pump
connectmg
rod

Remove
rubber

pipe
from
choke

piston

Loosen
off
bolts

secutlng
servo

diaphragm
In

positIOn
take
out

dIaphragm

Back
off
total
of
five
bolts
which
hold
choke
In

posItion
and

remove
rods
of
starter

system

take
out
choke
chamber

In

removmg
chamber

exercise
care
to
aVOId

damaging
float

The

pnmary
and

secondary
emulsIOn
tubes

can
be
disassembled

by
removmg
the

main
air

bleeds

on
the
indiVidual
SIdes

UII
ij

Fig
101

Removmg
choke
chamber
and
servo

diaphragm

o

llQt

o

Fig
102
Removmg
emulsion
tubes

Brakes

groove
of

pIston
goes
insIde
of
seal
as

shown
in

Figure
117
and
the
seal
will
be

damaged
When
the

piston
is

pushed
ex

cesslvely
mto
the

cylinder
remove
the

brake

assembly
disassemble
It

push
out

the

piston
to
the
arrow
direction
as

shown
in

Figure
117
and
reassemble

Install

pad
and
antt

squeal
shim
assemble

the
anti

squeal

spring
and

retaining
pin
and

ecure
them
with

cltp

Install
the
shim

so
that
the

arrow
mark

pOints
the
rotor
forward

rotating
directIOn

Apply
the
COIl

spring
to
the

retaining
pin

which

IS
distanced
from
the

atr
bleeder

111
PlSton
seal

I
2

I
Normal

position
I

Fig
117
Piston

pushIng
In

posllIon

FIg
118
Arrow
mark
on
shim

78
When
the

pad
IS
Installed

depress
the
brake

pedal
several
tl
mes
so
as
to
settle
down
the

pad
In

the

posltton

CALIPER

Removal

Remove
the
brake

pad

DIsconnect
the
brake
tube
from
the
wheel

cyltnder

Remove
the
strut

assembly
and
knuckle
arm

installatIOn
bolt
so
as
to
ease
removal
of
the

cahper
assembly
installatIOn
bolt

Remove
the

cahper
assembly
installatIOn
bolt

and

separate
It

from
the
strut

assembly

Fig
119
RemOVing
strut
assembly
and
knuckle
arm
in

stallatIon
bolt

Fig
120

RemOVing
caliper
assembly
Installallon
bolt