engine DATSUN PICK-UP 1977 Service Manual

DATSUN PICK-UP 1977 Service Manual PICK-UP 1977 DATSUN DATSUN https://www.carmanualsonline.info/img/56/56909/w960_56909-0.png DATSUN PICK-UP 1977 Service Manual

Page 151 of 537

DATSUN PICK-UP 1977  Service Manual 
Air

pump

I

Operate 
engine 
until 
it 
reaches

normal

operating 
temperature

2

Inspect 
all 
hose 
hose 
connec

tions 
and 
air

gallery 
for 
leaks 
and

correct 
if

necessary 
before

chec

Page 152 of 537

DATSUN PICK-UP 1977  Service Manual 
Race

engine 
approximately 
2 
000

rpm 
under 
no 
load 
Place

your 
hand

on 
air 
outlet 
of 
E 
A 
R 
valve 
to 
check

for

presence 
of

discharged 
air 
If 
air 
is

felt

E 
A 
R 
valve 
is

Page 153 of 537

DATSUN PICK-UP 1977  Service Manual 
E 
G 
R 
OFF

operation

When

engine 
coolant

temperature

is 
low

recirculated 
exhaust

gas 
causes

irregular 
engine

operation 
To

prevent 
Emission 
Control

System

this 
recirculation

of

Page 154 of 537

DATSUN PICK-UP 1977  Service Manual 
6

Thermal 
vacuum 
valve

Open

E 
G 
R 
control 
valve 
Close

E 
G 
R 
ON

operation

The 
E 
G 
R 
circuit 
is

completed

only 
when

engine 
coolant

temperature 
Emission 
Control

System

I

Page 155 of 537

DATSUN PICK-UP 1977  Service Manual 
j

EC231

Thermal

vacuum 
valva 
o

o

m 
Emission

Control

System

0

o

o

o

l

l 
@

The 
thermal 
vacuum 
valve

is

mounted 
in

the

engine 
thermostat

housing 
It

detects

engine 
coolan

Page 156 of 537

DATSUN PICK-UP 1977  Service Manual 
1

1

I 
I

I

1 
v

v

I 
I

I 
I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

L 
0

I

Magnet 
coil

Detector 
drive

counter

REMOVAL 
AND

INSTALLATION

Remove 
air 
cleaner

before

remov

Page 157 of 537

DATSUN PICK-UP 1977  Service Manual 
4 
E 
G 
R

warning 
system

EC251

Detector 
drive 
counter

Detecfor 
drive 
counter 
is 
secured

on 
the

top 
of 
R 
H

hoodledge 
panel 
in

engine 
room 
To

remove 
detector 
drive

counter

Page 158 of 537

DATSUN PICK-UP 1977  Service Manual 
Ignition 
Switch 
Position 
START

Detector 
Drive

Counter

E 
G 
R

Warning 
Lamp 
ON

b 
After

completing 
inspection 
of

E

G 
R

control 
system 
be

sure 
to

reset

odometer 
of 
detector 
d

Page 159 of 537

DATSUN PICK-UP 1977  Service Manual 
EC350

Fig 
EC 
65

Cleaning 
E

G 
R 
control

valve

Thermal

vacuum

valve

Dismount 
thermal

vacuum 
valve

from

engine

Note 
Before

dismounting 
drain 
en

gine 
coolant

from

engine

Apply

Page 160 of 537

DATSUN PICK-UP 1977  Service Manual 
REMOVAL

AND

INSPECTION

Removal 
and

inspection 
can 
be

done

as 
follows

Removal

Catalytic 
converter

1

Apply 
parking 
brake

2

Place 
wheel 
lock 
under 
each 
tire

3

Jack

up 
the 
ve