1977 DATSUN PICK-UP ECU

SUPPORTABLE
POINTS

The
front

supportable
points
are

under
frame

side
member

The
rear

supportable
points
are

under
rear

axle
case

Fig
GI

16
Front

supportable
points

v

GI078

Fig
GI
17
Rear

supportable
points

TOWING

When
the
vehicle
is
to
be

towed

forward
connect

a

rope
securely
to

the
hook
under
the
1st

CrosSIn
ember

Before

towing
make
sure
the

parking

brake
is

released
General
Information

To
tow
another
car
connect
t1ie

rope
to
rear
leaf

spring
shackle

Notes

a
A

towing
rope
should
not
be
con

nected
to

any
position
other
than

as
described
above

b
Avoid

applying
load

suddenly
to
a

towing
rope
as
it

may
cause
dam

age

WH131

Fig
Gl
18

Fronttowing
point

Fig
01
19
Rear
towing
point

GI
7
Manual
transmission

Before

towing
make
sure

the
trans

mission
is
in
neutral

gear

If
the
rear
axle
or
transmission
is

inoperative
the
vehicle
should
be

towed
with
its

rear
wheels
off
the

ground
or
the

propeller
shaft
must
be

re
l1oved

Automatic
transmission

When
the
vehicle
is
towed
on
its

rear
wheels
make
sure
the
trans

mission
is
in
N

Neutral
position

Don
t
exceed
30
km
h
20

MPH
and
a

distance
of
Hi
kin

6
miles
If
the
rear

axle
or
transmission
is

inoperative
or

if
the

speed
exceed
the
above
condi

tions

the
vehicle
must
be
towed
with

its

rear
wheels
off
the

ground
or
the

propeller
shaft
must
be
removed

Note
When
the
vehicle
is
towed
with

its
front
wheels
on
the

ground
the

steering
wheel
shouId
be
secured

to

maintain
a

straight
ahead

position

TIE
DOWN

The
front
two
tie

down
hooks

are

located
under

the
1st
crosSInember

The
hook
is

available
as
a

towing

hook
For
rear
tie
down
the
rear
leaf

spring
shackle
be
used
lIDs

point
is

also
used
as
a

towing
point

Engine
Tune

up

BASIC
MECHANICAL
SYSTEM

ADJUSTING
INTAKE
AND
EXHAUST

VALVE
CLEARANCE

CHECKING
AND

ADJUSTING
DRIVE

BELT

RETIGHTENING
CYLINDER
HEAD
BOLTS

MANIFOLD
NUTS
AND
CARBURETOR

SECURING
NUTS

CHECKING
ENGINE
OIL

REPLACING
OIL
FILTER

CHANGING
ENGINE

COOLANT

ADJUSTING
INTAKE

AND

EXHAUST

VALVE
CLEARANCE

Note
After

tightening
cylinder
head

bolts

adjust
intake

and
exhaust

valve
clearances

Valve
clearance

adjustment
is

impossible
when
the

engine
is
in

oper

ation

1
Loosen

pivot
locking
nu
t
and

turn

pivot
screw
until
the

specified

clearance
is
obtained
while
cold

Using
service

tool

tighten
pivot

locking
nut

securely
after

adjustment

and
recheck
the
clearance

2
Warm

up
engine
for
at
least

several
minutes

and

stop
it
Measure

valve
clearance
while
hot
If
out
of

specifications
adjust

Unit
mm
in

Intake
0
20

0
008

Cold

Exhaust
0
25
0

010

Intake
0
25

OmO

Wann

I
Exhaust

0
30
0

012

STl
064000

I

ET009

Fig
ET

5

Adjusting
valve

clearance
CONTENTS

ET
7
PERMANENT
ANTI
FREEZE

COOLANT

CHECKING
COOLING
SYSTEM
HOSES

AND
CONNECTIONS

INSPECTION
OF

RADIATOR
CAP

COOLING
SYSTEM
PRESSURE
TEST

CHECKING
VACUUM

FITTINGS
HOSES

AND
CONNECTIONS

CHECKING
ENGINE
COMPRESSION

COMPRESSION
PRESSURE
TEST

TEST
RESULT
ET
7

ET7

ET
B

ET
B

ET
B

CHECKING
AND

ADJUSTING

DRIVE

BELT
ET

B

ET

B

ET
B

ET
B

ET

B

ET
9

ET
9

ET
9

2

Normal
drive
belt
deflection
is

8

to
12
mm

0
315
to
0
472

in
when

moderate
thumb

pressure
is

applied

midway
between

pulleys

1
Check
for

cracks
or

damage
Re

place
if

necessary

Compressor
pulley

8
to
12
mm
0
315
to
0
472
in

Idler

pulley

Water

pump
pulley

8
to
12
mm

0
315
to
0
472
in

Air

pump
pulley

Alternator

AC456

Fig
ET
6
Driue
belt
tension

RETIGHTENING

CYLINDER
HEAD

BOLTS
MANIFOLD

NUTS
AND

CARBURETOR

SECURING

NUTS
Tightening
torque

Cylinder
head
bolts

1st

turn

4

0

kg
m
29
ft
Ib

2nd
turn

6
0

kg
m

43
ft
Ib

3rd
turn

6
5
to

8
5

kg
m

47

to
61
ft
lb

Refer
to
the

following
tightening

torque
specifications

ET
7

Engine
Mechanical

Standard

Wear
limit

Inner
diameter
85
000

to
85
050

0

2
0
0079

3
3465
to
3
3484

Cylinder
bore

mm
in
Out
of
round
O
ot5
0
0006

Taper
0
015
0
0006

Difference
in

cylinder
bore

0
05
0
0020

0
2
0
0079

mm
in

CYLINDER

BORING

I
When

any
cylinder
needs

boring

all
other

cylinders
must
also
be
bored

at
the

same
time

Oversize

pistons

spec
Hic
etlons

Piston
diameter
mm
in

Servioe
standard

0
50
0
0197

Oversize

1
00

0
0394

oversize

3
The
size

to
which

cylinders
must

be

honed
is

determined

by

adding

piston

to
cylinder
clearance
to
the

largest
piston
diameter
at

piston
skirt

in

thrust
direction

EM126

Fig
EM
54

Measuring
piston
diamet
r
2

Determine

piston
oversize
ac

cording
to
amount
of
wear
of

cylinder

84
985
to
85
035

3
3459

to
3
3478

85
465
to
85
515

3
3648
to
3

3667

85

965
to
86
015

3
3844
to
3

3864

Standard
clearance

ffim
in

Feeler

gauge
mm

in

Extracting
force

kg
Ib

Notes

a

To

prevent
strain
due
to

cutting

heat
bore
the

cylinders
in
the
order

of

2
4
1

3

b

Before

boring
any
cylinder
install

main

bearing
caps
in

place
and

tighten
to
the

specification
so
that

the
crankshaft

bearing
bores
will

not
become
distorted

from
the
bor

ing
operation

4

Do
not
cut

too
much
out
of

cylinder
bore

at
a
time
Cut

only
0
05

mm
0
0020
in

or
so
in
diameter

at
a

time

EM
14
L

7
A

aboull
6
m

o
7323in

r

127

Fig
EM
55

MeCUJlJring
piston
skirt

diameter

Rebored
size

calculation

o
A
B
C
A
0
005
to

0
Q25
mm

0
0002
to
0
0010
in

where

D
Honed

diameter

A

Skirt
diameter
as
measured

B
Piston
to
wall

clearance

C

Machining
allowance
0
02
mm

0
0008
in

0
025

to
0

045
0

0010
to
0
0018

0
04
0

0016

0
2

to
1

5
O

44
to

3
31

5

Measurement

of
a

just
machined

cylinder
bore

requires
utmost
care

since
it

is

expanded
by

cutting
heat

6

As
a
final

step
cylinders
should

be

honed
to
size

7

Measure
the

finished

cylinder

bore
for

out
of
round
or

tapered
part

8
Measure

piston
to

cylinder
clear

ance

This

clearance
can
be
checked

easily
by
using
a
feeler

gauge
and
a

spring
balance
hooked

on
feeler

gauge

measuring
the
amount
of
force

re

quired
to

pull

gauge
out
from

between

piston
and

cylinder

5
Install
rocker
arms

by

pressing

valve

springs
down
with
a
screwdriver

6
Install
valve
rocker

springs

7
After

assembling
cylinder
head

turn
camshaft
until
No
I

piston
is
at

T
D
C
on
its

compression
stroke

EM1S5

Fig
EM
83

A
embling
cylinder
head

PISTON
AND

CONNECTINGROD

1

Assemble

pistons
piston
pins
and

connecting
rods

on
the
de
ignated

cylinder

STl3030001

EM156

Fig
EM
84
Installing
piston
pin

EM157

Fig
EM
85
Assembling
piston
and

connecting
rod

Notes

a
Piston

is

pressed
into

connecting

rod
with

fitting
force
of
0
5
to
5

tons
aid
of
Piston
Pin
Press

Stand
STl303000
I
is

necessary

When

pressing
piston
pin
into
con

necting
rod

apply
engine
oil
to

pin

and
small
end
of

connecting
rod
Engine
Mechanical

b

Arrange
so
that
oil

jet
of
connect

ing
rod
big
end
is
directed
toward

right
side
of

eylinder
block

c

Be
sure
to
install

piston
in

cylinders

with
notch
mark
of

piston
head

toward
front
of

engine

2

Install

piston
rings

InstalI

top
and
second

rings
in

right

position
with
marked
side

up

Notes

a

Top
ring
is

chromium

plated
on

liner

contacting
face

b
Second

ring
has

larger
taper
surface

than

top
ring

c
In
the
combined
oil

ring
upper
rail

is
the
same
as

lower
one

j

c6J

EM158

Fig
EM
86

lalling
pidon
rings

3

Fix

bearings
on

connecting
rod

and

connecting
rod

cap

Note
Clean
back
side
of

bearing
care

fully

ENGINE
ASSEMBLY

The
first

step
in

engine
assembly

is

to
bolt

Engine
Attachment

ST0526000
I

to

right
hand
ide
of

cylinder
block
Next
install
block
on

another

Engine
Stand
ST0501S000

with

engine
bottom

up

2

Set
main

bearings
at

the

proper

portion
of

cylinder
block

Rear
Front

III
III

m
It
IlL

D

D

D
D
D

1
5
1
4
1
3
1
2
1
1

EM159

Fig
EM
87
Main

bearings

EM
22
3
Install
baffle

plate
including

cyl

inder
block
net

Notes

a

Only
center

bearing
No
3

is
a

flanged
type

b
All
inter
bearings
No
2

and
No
4

are
the
same

type

c
Front

bearing

No
I
is

also
the

same

type
as
rear

bearing
No
5

The
difference
is

that
an
oil
hole
is

provided
in
the
front

bearing

d
All

upper
and
lower

bearings
are

interchangeable

4

Apply
engine
oil

to
main

bearing

surfaces
on
both
sides
of

cylinder

block
and

cap
and
then
install
crank

shaft

5
Install
main

bearing

cap
and

tight

en

bolts
to

specified

torque

Tightening
torque

4
5
to
5
5

kg
m
33

to
40
ft
lb

Notes

a

Apply
sealant
to
each
side
of
rear

main

bearing
cap
and
each
comer

of

eylinder
block
as
shown
in

Figure
EM
79

b

Arrange
parts
so
arrow
mark
on

bearing
cap
faces
toward
front
of

engine

c

Prior
to

tightening
bearing
cap

bolts

place
bearing
cap
in

proper

position
by
shifting
crankshaft
in

the
axial
direction

d

Tighten
bearing
cap
bolts

gradually

in
two
to
three

stages
outwardly

from
center

bearing
in
the

sequence

as
shown
in

Figure
EM
88

e
After

securing
bearing

cap
bolts

ascertain
that
aankshaft
turns

smoothly

@

i

d

l

j
1

@EM543

Fig
EM
8S
Torque

sequence
0

cap
bolt

6
Make

sure
that

crankshaft
has

proper
end

play

Crankshaft
end

play

0
05
to
0
18

mm

0

0020
to
0
0071
in

Fig
EM
89

Checking
crankshaft

end

play

7

Install
side
oil
seals
into

rear
main

bearing

cap
Prior
to

installing
apply

sealant
to
seals

Fig
EM
90

Driving
side
oil
seal

8
Install
rear
oil
seal

using
Crank

shaft
Rear

Oil
Seal
Drift

STI5310000

r

STl5310000

r

EM163

Fig
EM
91

Installing
rear
oi
seal
Engine
Mechanical

Note
When

installing
oil
seal

give

coating
of

engine
oil
to

mating

shaft
to

prevent
scratches
and

fold

ed

lip
Also

give

coating
of
oil
to

periphery
of
oil

seal

9

Install
rear
end

plate

10
Install

flywheel
securely
and

tighten
bolts
to

specified

torque

Tightening

torque

14

to
16

kg
m

101
to
116
ft
lb

I
I

Insert

pistons
in

corresponding

cylinder

using
Piston

Ring
Compressor

EM03470000

EM03410000

I

EM544

Fig
EM
92

Installing
pi8ton
rod

a
Sembly

Notes

a

Apply
engine
oil

to

sliding
parts

b

Arrange
80

that
notch
mark
on

piston
head
faces
to
front
of
en

gine

c
Install

piston
rings
at
1800
to

each

other

avoiding
their
fit
in
the

thrust
and

piston
pin
directions

6
Top
ring

I
iilring

Piston

pin
ireClioJ

EM165

Fig
EM

93
PUtan

ring
direction

12
Install

connecting
rod

caps

Tightening
torque

4
5
to
5
5

kg
m
33
to
40
ft
lb

EM
23
Fig
EM

94

Installing
connecting
rod

cap

Note
Install

connecting
rods

and
con

necting
rod

caps
80
that
their

as

signed
numbers
are

positioned
on

the

same
side
and
in
the
SlIme

direction
with

respect
to

cylinders

13
Make
sure
that

connecting
rod

big
end
has

proper
end

play

Fig
EM

95

Checking
big
end

play

Big
end

play

0
2
to
0
3
mm

0
008
to
0
Ql2
in

14

Install

cylinder
head

assembly

Fig
EM
96

Tightening
sequence

01

cylinder
head
bolts

J
Thoroughly
clean

cylinder
block

and

head
surface

Do

not

apply
sealant
to

any
other

part
of

cylinder
block
and
head

sur

face

Speci
ol

Cylinder
Head
Bolt

Wren
h

8110120000

Tightening
torque

1st
turn

4

0

kg
m
29

ft
lb

2nd
turn

6
0

kg
m
43
ft
lb

3rd
turn

6
5

to
8
5

kg
m

47
to
61
ft
lb

B
O

A

A

B

A

A
B
O

B
O

R
O

EM
176

Fig
EM
I02

Cylinder
head
boll

Notes

a
Be
sure
to

tighten
two
small
bolts

b
After

engine
has
been

operated
for

several
minutes

retighten
if
neces

sary

23
Install
oil

pump
and
distr
butor

driving

spindle
in

front
cover

Tightening
torque

1
1
to
1
5

kg
m

8
0

to
10
8
ft
lb

Notes

a
Assemble
oil

pump
and
drive

spin

die
aligning
driving

spindle
face

with
oil

pump
hole

b
Install
oil

pump
together
with

drive

spindle
so
that
the

projection
on
its

top
is
located
at
the
II
25
a
m

position
At
this

point
the
smaller

bow
shape
will
be

facing
toward
the

front

c
Do
not

forget
to
install

gas
et
Engine
Mechanical

I

Fig
EM

I04

11l6lalling
oil

pump

24
Install
fuel

pump
water
inlet

elbow
and
front

engine
slinger
in

their

positions

Fuel

pump
tightening
torque

1
2

to
1
8

kg
m

8
7

to
13

0
ft
lb

Note
Do
not

forget
to
install
fuel

pump
spacer
and

packing
between

spacer
and
block

spacer
and

fuel

pump

25
Install
oil
strainer
oil

pan
gasket

and
oil

pan

27

Install
rocker
cover
to

cylinder

head

Note
Make

sure
that
one
of
the

rocker
cover
bolts
is

longer
than
the

others
It
secures
F
I
C
D
assist

bracket

28
Install
air

pump
bracket
and

cooler

compressor
to

cylinder
block

EM
25
Tightening
torque

Oil
strainer

bolts

0

8
to
I
l

kg
m
5

8
to
8
0
ft

lb

Oil

pan
bolts

0
6
to
0
9

kg
m
4
3

to
6
5
ft

lb

Notes

a

Apply
sealant
to
the

step
portions

at

four

mating
surfaces

as
shown

in

Figure
EM
80

b

Oil

pan
should
be

tigh
tened
in

criss
cross

pattern
to
a
final

torque

of
0
6
to
0

9

kg
m
4
3
to
6
5
ft
lb

26

Adjust
valve
clearance
to
the

specified
dimensions

Special
tool

Pivot

Adj
iier
STl064000l

Tightening
torque

5

0
to
6
0

kg
m

36
to
43
ft
lb

Fig
EM
I05

Adjusting
valve
clearance

b
After

engine
has
been
assembled

run
it
for
at
least
several
minutes

and

finally
adjust
clearance
to
the

warm

specifications

29

Install
intake
manifold
to

ex

haust
manifold
The
intake
manifold

face
which
comes
into
contact
with

gasket
should
be
even
with
that
of

exhaust
manifold
Note
that
two
dif

ferent

sizes
of

attaching
bolts
are
used

Tightening
torque

2
5

kg
m

18
0
ft

lb

30
Install
heatshieid

plate
on
mani

fold
assembly

31
Install
air

gallery
pipe
on
ex

haust
manifold

32
Install
manifold

gasket
and

manifold

assembly
on

cylinder
head

Tightening
torque

1
2to
1

6kg
m

8
7
to
11
6
ft
lb

33

Install
blow

by
gas

pipe
on

cyl

inder

block
and
tighten
with
rear

engine
slinger

34
Install
thermostat
housing

gas

ket
thermostat

housing
and

thermo

stat

35
Install
thermal
vacuum
valve
on

thermostat

housing
Before

installing

apply
a

liquid
packing
slightly
to
the

threads

36

Install
FJ

C
D
bracket
on

cylin

der

head

37

Install
E
G
R

passage
and

E
G
R
valve
on
intake
manifold

38
Connect
E

G
R
tube
to
E

G
R

tube
and

exhaust
manifold

39
Install
check
valve

on
air

gallery

pipe

40
Install
air
cleaner
bracket
on

intake
manifold

41
Install
air
control
valve
on
air

cleaner
bracket
California
models

42
Install
vacuum
and
fuel
tubes

combined
on

cylinder
head

43
Install
distributor

assembly

44
Install

heatshield
plate

joint

seat

and
carburetor

Carbure10r
tightening

torque

0
5

to
1

0

kg
m
3

6
to
7
2

ft
lb

Note
When

instalUng
joint
seat
be

sure
to

put
the
duct
into

primary

hole
in

intake
manifold

S

J

Heatshield

plate
4
Joint

seat

2

Primary
hole
5

Secondary
hole

3
Duct

EM534

Fig
EM
I06

Installing
carburetor

joint
seat
Engine
Mechanical

45
Install
dash

pot
bracket
and

dash

pot
to
intake

manifold

46
Connect
all
air

vacuum
and
fuel

hoses

and
then

secure
with

clamps

I
Cylinder
block
to

P
C
V
valve

hose

2
A
B

valve
to
E

G
R

passage
vac

uum
hose

3
A
B

valve
to
E
G

R

passage
air

hose

4
Vacuum
tube
to
carburetor
vac

uum
hoses

5
Fuel
ube

to
carburetor
fuel

hose

6
Fuel
tube
to
fuel

pump
fuelhose

7
Distributor
to
vacuum
switch
or

spark
delay
valve
vacuum
hose

8
Air
control
valve
vacuum
hose

9
Check
valve

to
air

control
valve

hose

10
Thermal
vacuum
valve
to

E
G
R
valve
vacuum
hose

I
I
Thermal
vacuum
valve
to

vacuum
tube
hose

47
Install
carburetor
air

cleaner
on

carburetor
and
then
connect
air

and

vacuum
hoses

as
follows

I

Air
cleaner
to

exhaust
manifold

hot

air
duct

2

Air
c1eaner
to
air

pump
hose

3

Air
cleaner
to
rocker

cover
hose

4

Air
cleaner

to
air
control
valve

hose

5

6

48
Install

spark
plugs
in

place

49
Connect
all
distributor

high
ten

sion

cables
to

spark
plugs

50
Install
air

pump
drive
belt
cool

er

compressor
and
idler

pulley

51

Install
left

engine
mounting

bracket

52
Install
clutch

assembly
on

flywheel
with
Clutch

Aligning
Bar

KV30100200
Air

cleaner
to
A
B

valve

hose

Other
vacuum
hoses

Tightening
torque

1
2
to
2
2

kg
m

8

7
to
15
9

ft
lb

EM
26
I

I

KV30100200

EM440

Fig
EM
I07
In

talling
clutch
embly

53

Using
an
overhead
hoist
and

lifting
cable
hoist

engine
away
from

engine
stand
and

then
down
onto

engine
carrier

54
Install

right
engine
mounting

bracket
oil
filter
oil

pressure
switch

oil

level

gauge
and
water

drain

plug

When

installing
oil

filter
fasten
it
to

cylinder
block

by
hand

Note
Do
not

overtighten

flit
or
oil

leakage
may
occur

55
Install
alternator
bracket

adjust

ing
bar
alternator

cooling
fan

and

belt

56

Adjust
the
deflection
of
drive

belts
when

thumb

pressure
is

applied

midway
between

pulleys
A

pressed

force
is
above
10

kg
22
0
lb

Deflection

of
drive
belts

8
to
12
mm

0
315

to
0
472
in

EM613

Fig
EM
lOB
Fan
belt
tension

57
Fill

engine
oil

up
to

specified

level

ENGINE
LUBRICATION

SYSTEM

ENGINE

LUBRICATION
SYSTEM

CONTENTS

LUBRICATION
CIRCUIT

01
L
PUMP

Removal

Installation

Disassembly
and

assembly
EL
2

EL
2

EL
2

EL
2

EL
3
Inspection

OIL

PRESSURE

REGULATOR

VALVE

OIL
FILTER

RELIEF

VALVE
EL
3

EL
4

EL
4

EL
4

E
L049

Fig
Elr
I

Lubricating
circuit

LUBRICATION

CIRCUIT

The

pressure
lubrication

of
the

engine
is

accomplished
by
a
tro

choid

type
oil

pump
This

pump

draws
the

oil

through
the
oil
strainer

into

pump

housing
and
then
forces
it

through
the
full
flow

type
oil
filter

into
the

main
oil

gallery
Part
of
the

oil
is

supplied
to
all
crankshaft

bearings
chain

tensioner
and

timing

chain

Oil

supplied
to
crankshaft

bearings
is
fed
to

connecting
rod

bearings

through
the
drilled

passages

in
the
crankshaft
Oil

injected
from

jet
holes
on

connecting
rods
Iubri

cates
the

cylinder
walls
and

piston

pins
The

other

part
of
the
oil
is

brought
to

the
oil

gallery
in
the
cylinder
head
to

provide
lubrication

of
the
valve
mechanism

and

timing

chain
as
shown
in

Figure
EL
2

ELOSO

Fig
EL
2

Lubricating
vallie
mechanism

EL
2
From
this

gallery
oil
holes

go

directly
to
all
camshaft

bearings

through
cam

brackets

Oil

supplied

through
the
No
2
and

No
3
camshaft

bearings
is
then
fed

to
the
rocker

arm
valve
and
eam

lobe

through
the

oil

gallery
in

the

camshaft
and
the

small
channel
at
the

base
circle

portion
of
each
earn

OIL

PUMP

The

oil

pump
is

secured
on
the

bottom
of
the
front
cover
with
four

bolts
and
driven

by
the
oil

pump
drive

spindle
assembly
which
is

driven

by

the
helical

gear
on
the
crankshaft

The
oil

pump
assembly
consists
of

an
oil

pressure
regulator
valve
and

outer
and
inn
r

rotors

The

spring
loaded
oil

pressure
regu

lator
valve
limits
the
oil

pressure
to
a

maximum

of
5
6

kg
em
80

psi

Removal

I

Remove
distributor

2

Drain

engine
oil
if

necessary

3

Remove

oil

pump
body
with

drive

spindle

assembly

Installation

I

Before

installing
oil

pump
on

engine
turn
crankshaft

so
that
No
I

piston
is

at
TD
C