1973 DATSUN B110 Service Repair Manual

immobilizer radiator engine oil capacity alternator ESP inoperative reset

Page 329 of 513

DATSUN B110 1973 Service Repair Manual
ENGINE

3
Connect
a
3

way
connector
a

manometer
and
a

cock
or
an

equivalent
3

way
change
cock
to
the

end

of
the

vent
line

4

Supply
fresh
air
into
the

vapor
vent
line

ENGINE

3
Connect
a
3

way
connector
a

manometer
and
a

cock
or
an

equivalent
3

way
change
cock
to
the

end

of
the

vent
line

4

Supply
fresh
air
into
the

vapor
vent
line

through
the

cock
little

by
little

until
the

pressure
becomes
368

mm

Aq
14
5
in

Aq

5
Shut
the
cock

completely
and

leave
it
that

way

6
After
2
5
minutes
measure
the

height
of
the

liquid

in
the
manometer

7
Variation
of

height
should
remain
within
254

mmAq
1
0
in

Aq

8
When
the
filler

cap
does
not
close

completely
the

height
should

drop
to
zero
in
a

short
time

9

If
the

height
does
not

drop
to
zero
in
a

short
time

when
the

filler

cap
is
removed
it
is
the
cause
of
the

stuffy
hose

Note
In

case
the
vent
line
is

stuffy
the

breathing
in

fuel

tank
is
not

thoroughly
made
thus

causing

insufficient

delivery
of
fuel
to

engine
or

vapor

lock

It
must
therefore
be

repaired
or

replaced

3

way

connector

Cock

Air

Manometer
Vapor
liquid

seearator

Flow

guide
valve

E

CQ29

Fig
ET
40

Checking
evaporative
emission
control

system

Checking
flow

guide
valve

I
Disconnect
all
hoses
connected
to
the

flow

guide

valve

2
While
lower

pressure
air
is

pressed
into

the
flow

guide
valve
from
the
ends
of
vent
line
of

fuel
tank
side

the
air
should

go
through
the
valve
and
flow
to

crankcase

side
If
the
air
does
not
flow
the

valve
should

be

replaced
But
when
the
air
is
blown
from

crankcase

side
it
should
never
flow

to
the
other

two
vent
lines

3
While

the
air
is

pressed
into

the
flow

guide
valve
from
the
carburetor
air

cleaner
side

it
flows
to
the

fuel

tank
side
and
or

crankcase
side

4

This
valve

opens
when
the

inner

pressure
is
10

mmHg
0
4
in

Hg
In

case
of

improper

operations
or

breakage
replace
it

From

carburetor

air
cleaner

From
fuel
tank

i

I
I

ti

i

i

1
1

i
To
ran
kcase

E
C030

Fig
ET
41
Flow

guide
valve

Checking
fuel
tank

vaCCUID
relief

valve

operation

Remove
fuel
filler

cap
and
see
if
it
functions

properly

as

follows

Wipe
clean
valve

housing
and
have
it
in

your
mouth

2

Inhale
air
A

slight
resistance

accompanied
by
valve

indicates
that
valve
is
in

good
mechanical
condition
Note

also
that

by
further

inhaling
air
the
resistance
should
be

disappeared
with
valve
clicks

3

If
valve
seems
to
be

clogged
or
if
no
resistance
is
felt

replace
cap
as
an

assembled
unit

T

1i
v

rUr1f
AlI
j

r
I
r
tLMJJl

rr
L

cc

11

J
v

II

4J
L

Valve
I

valve
seat

Spring
Valve

housing

Fig
ET

42
Fuel

filler
cap

ET
24

Page 330 of 513

DATSUN B110 1973 Service Repair Manual
EMISSION
CONTROL
AND
TUNE
UP

SERVICE
DATA
AND

SPECIFICATIONS

Valve

clearance

Hot
Intake

Exhaust
mm
in

rom

in

rom
in

kg
lb
0
35
0
014

0
35
0
014

10
to
15
0
394
to
0
5

Page 331 of 513

DATSUN B110 1973 Service Repair Manual
ENGINE

Spark
plugs

Cap
mm
in
0
8
to
0
9
0
03110
0
035

Idle
CO
ldie

speed

Manual
transmission

rpm

rpm
1
5

to
5
800

1
5
to
5

650
in
D

position
Automatic
transmission

D

Page 332 of 513

DATSUN B110 1973 Service Repair Manual
EMISSION
CONTROL
AND

TUNE
UP

Trouble

shooting
procedure
on

starting
circuit

Switch

on
the

starting
motor

with

light
put
on

When

light
goes
off
or
dims

considerably

a
Check

Page 333 of 513

DATSUN B110 1973 Service Repair Manual
ENGINE

Defective

spark
plug

Improper
ignition
timing

Defective

ignition
coil

Disconnection
of

high
tension

cable

Loose
connection
or
disconnection
in

prima

ry
circuit

Lack
of

Page 334 of 513

DATSUN B110 1973 Service Repair Manual
IMPROPER
ENGINE

IDLING

Fuel

system
in

trouble

Low

compression

Others

Ignition
system
in
trouble

Engine
idle
too
fa
t

ENGINE
POWER
NOT

UP
TO
NORMAL

4
w

compression

Ignition

Page 335 of 513

DATSUN B110 1973 Service Repair Manual
Air
intake

system
in

trouble

Overheating

Overcooling

Others

NOISY

ENGINE

Car

knocking

Car
knock
when

coasting
ENGINE

Diny
ur

clogged
fuel
strainer

Fuel

pump
will
not
work

p

Page 336 of 513

DATSUN B110 1973 Service Repair Manual
EMISSION
CONTROL
AND

TUNE
UP

Mechanical

knocking

Crankshaft

bearing

knocking

Connecting
rod

bearing

knocking

Piston
and

cylinder

noise

Piston

pin
noise

Water

pump
noise

Others

EMISSION
CONTROL
AND

TUNE
UP

Mechanical

knocking

Crankshaft

bearing

knocking

Connecting
rod

bearing

knocking

Piston
and

cylinder

noise

Piston

pin
noise

Water

pump
noise

Others
Defect
or

malfunction
of

ignition
system

spark
plug
high
tension
cable
breaker

point
ignition
coil
etc

This

strong
dull
noise
increases
when
the

engine
is
accelerated
To
locate

the

place

calise
a
misfire

on
each

cylinder
If
the
noise

stops
by
the

misfire
this

cylinder
generates

the
noise

This
is
a
little

higher
pitched
noise

than
the

crankshaft

knocking
and
also
increases

when
the

engine
is
accelerated
Cause
a

misfire
on
each

cylinder
and
if
the
noise

diminishes
almost

completely
this
crank

shaft

bearing
generates
the

noise

When

you
hear
an

overlapping
metalic
noise

which
increases
its

magnitude
with
the
revo

lution
of
the

engine
and

which
decreases
as

the

engine
is

warmed

up
this
noise
is
caused

by
the

piston
and
cylinder
To
locate
the

place
cause
a
misfire
on
each

cylinder

This
noise
is

heard
at
each

highest
and

lowest
dead

end
of
the

piston
To
locate

the

place
cause
a
misfire
on
each

cylinder

This

noise

may
be

caused

by
the
worn
or

damaged
bearings
or

by
the
uneven

surface

of

sliding
parts

An

improper
adjustment
of
the
valve
clear

ance

Noise

of
the

timing
chain

An

excessive
end

play
on
the
crankshaft

Remarks

Disengage
the
clutch

slightly
and

this

noise
will

stop

Wear
on
the
clutch

pilot
bushing

Remarks
This
noise
will
be
heard
when
the

clutch
is

disengaged

ET
31
Adjust
or

replace
ignition
syste
m

This
is

caused

by
the
wom
or

damaged

bearings
or

unevenly
worn
crankshaft

Renew
the

bearings
and

adjust
o

change
the

crankshaft

Check
the
lubrication

system

Same
as
the

case
of
crankshaft
bear

ings

This

may
cause
an
abnormal

wearing

of
the

cylinder
and
lower

compression

which
in

turn
will

cause
a

lower

output
power
and
excessive

consump

tion
of
oiL

Overhaul
the

engine

This

may
cause
a

wear
on
the

piston

pin
or

piston
pin
hole

Renew
the

piston
and

piston
pin
as

sembly

Replace
the

water

pump
with
a
new

one

Readjust

Adjust
the
tension

of
the
chain

Disassemble
the

engine
and
renew
the

main

bearing
bushing

Renew
the

bushing
and

adjust
the

drive
shaft

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