1973 DATSUN B110 engine overheat

AUTOMATIC
TRANSMISSIO
N

Trouble

IA
BCD

IE
F
G
H

IIJ
K
L

1M
NO
P

1m
n
q

riB
t

u
v
w

x

y

No
shock
at

changing
from
I
to

7
5

@
@
I

1
2
3
4

1
6

I
2

range
or

engine
extremely
races

Failure
to

change
from
3rd
to
2nd

1
2
4
5
7

16
3

I
@@
@

by

turning
lever
into
I

range

Engine
brake
does
not

operate
in

I
2
4
5
3

@
J

I

range

Gear

change
from
1st
to

2nd

or
from

2nd
to
3rd
in
I
I
2

@

range

Does

not

change
from
2nd

1
2
456
7
3

@
@

to
1st
in
I

range

Large
shock

changing
from
2nd

1

2
4
3

IDI

to
1st
in

I

range

Vehicle

will
move

when

changing
into

P

range
or

parking
gear
does
not

1

@

disengage
by
turning
off
P

range

Transmission
overheats
1
3

4

12
6
8
7
5

@@@I@@
@

Oil

shoots

out

during
run

@@@
@@
@
White
smoke
issues
out
from
tail
1

3
5

6
2
7
8
4

pipe
during
run

Offensive
smell
at
oil

charging

11
2

I@
@
ID@I

J
@@

@

pipe

Transmission
noise
in
P

and
N

1

2

I
I@
ranges

Transmission
noise
in

0

2
I

1
2

@
@

@
@

and
R

ranges

AT

57

CHASSIS

Trouble

shooting
guide
for

3N71B
Automatic
Transmission

Order
Test
item

Checking
Oil

level

gauge

2
Downshift
solenoid

3

ManuaIlinkage

4

Inhibitor
switch

5

Engine
idling
rpm

6
Vacuum

pressure
of
vacuum

pipe

7

Operation
in
each

range

8

Creep
of
vehicle

Stall
lest
Oil

pressure
before

testing

2
Stall
test

3

Oil

pressure
after

testing

Road
test
Slow
acceleration

Ist
2nd

2nd
3rd

2

Quick
acceleration

Ist
2nd

2nd
3rd

3
Kick
down

operation

3rd
2nd
or

2nd
1st
Procedure

Check

gauge
for
oil

level
and

leakage
before

and
after
each

test

Check

by
sound
whether
solenoid

operates
when

depressing

accelerating
pedal

fully
with

ignition
key
ON

Check

changing
conditions
into

P
R

N
D
2

and
I

ranges
by
moving
selector
lever

Check

whether
starter

operates
in
N

and
tp

ranges
only

and
whether

reverse

lamp
operates
in
R

range
only

Check
whether

idling
rpm
meet
standard

Checking
whether
vacuum

pressure
is
more
than
450

mmHg

in

idling
and

whether
it

decreases
with

increasing
rpm

Check
whether
transmission

engages
positively
by
shifting

N
o
D
N
2
N
I

and
N
R

range

while

idling
with
brake

applied

Check
whether
there

is

any

creep
in
D
2
I
and

R

ranges

2
1

and
R
range
Measure
line

pressures
in
D

while

idling

Measure

engine
rpm
and
line

pressure
in
D
2
I

and

R

ranges
during
fullthrallIe

operation

Notes

a

Temperature
of

torque
converter
oil

used
in
test
should

be

from
600
to
lOOoC

1400
to
2120F
i
e

sufficiently

warmed

up
but
not
overheated

b

For

cooling
oil

between
each
stall
test
for
D
2

1

and
R

ranges
idle

engine
i
e

rpm
at
about

1
200

rpm
for
more
than
1
minute
in
P

range
Measurement

time
must
not
be
more
than
5
secon

Same
as
the
item
I

Check
vehicle

speeds
and

engine

rpm
in

shifting
up
1st

2nd

range
and
2nd
J
3rd

range
while

running
with

lever
in

D

range
and

engine
vacuum

pressure
of

about
200

mmHg

Same
as

the
item
1
above

except
with

engine
vacuum

pressure
of
0

mmHg
i
e
in

position
just
before
kick

down

Check
whether
the
kick
down

operates
and

measure
the

time

delays
while

running
at
30
40
50

60
70
km
h

19

25
31
38
44
MPH
in
D

range

AT
58

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

properly

Clogged
carburetor

jets

Clogged
air
cleaner

Air

inhaling
from
manifold

gasket
or
carbu

retor

gasket

Insufficient
coolant

Loosened
fan
belt

Worn
or
defective
fan
belt

Defective
thermostat

Defective
water

pump

Clogged
or

leaky
radiator

Defective
radiator
filler

cap

Air

mixing
into

cooling
system

Improper
grade

engine
oil

Incorrect

ignition
timing

Defective
carburetor

lean
mixture

Defective
thermostat

Low

octane
fuel

Improper
tire

pressure

Dragging
brake

Slipping
clutch

Overloading
to

engine

Carbon

knocking

Timing
knocking

Fuel

knocking

Preignition
misusing
of

spark
plug

Incorrect
throttle

opener
adjustment

Trouble
in
PCV
valve

ET
30
Replace

Repair
or

replace

Disassemble
and
clean

Replace
element

Replace
gasket

Replenish

Adjust

Replace

Replace

Replace

Flush

repair
or

replace

Replace

Retighten
each

part
of

cooling
system

Replace
with

proper
grade
oil

Adjust

Overhaul
carburetor

Replace

Replace
with

specified
octane
fuel

Adjust
to

the
specified

pressure

Adjust

Adjust

Use

right

gear
in

driving

Disassemble
cylinder
head
and
remove

carbon

Adjust
ignition
timing

Use

specified
octane
fuel

Use

specified
spark
plug

Adjust
throttle

opener

Replace
PCV
valve

EMISSION
CONTROL
AND

TUNE
UP

Othm

POOR
FUEL

CONSUMPTION

See
the

explanation
of

the

power
decrease

Othe

TROUBLE
IN

OTHER

FUNCfIONS

Decreased
oil

pressure

Excessive
wear

on
the

sliding

parts
Damaged
or
seized

piston
rings

Worn

piston
ring
groove
and

rings

Fatigue
ofvalve
oil
seal

lip

Worn
valve
stem

Inadequate
quality
of

engine
oiL

Engine
overheat

Exceeding
idling
revolution

Defective
acceleration

recovery

Fuel

leakage

Inadequa
Ie
oil

quality

Overheat

Defective
function
of
oil

pump
regulator

valve

Functional
deterioration
of
oil

pump

Blocked
oil
ftIter

nerased
clearance
in
various

sliding
parts

Blocked
oil
strainer

Troubles
in
the
oil

gauge
pressure
switch

Oil

pressure
decrease

Defective

quality
or
contamination
of
oil

Defective
air

cleaner

Overheat
or
overcoal

ET
33
Renew
the

rings

Repair
or
renew
the

piston
and

cyl

inder

Renew
the

piston
and

piston
ring

Replace
the

seal

lip
with
a
new
one

Renew

the
valve
or
the

guide

Use
the

designated
oiL

Previously
mentioned

Adjust
it
to
the

designated
rpm

Adjust
it

Repair
or

tighten
the
connection

of

fuel

pipes

Use

the

designated
oil

Previously
mentioned

Disassemble
the

oil

pump
and

repair
or

renew
it

Repair
or

replace
it
with

a
new
one

Renew

it

Disassemble
and

replace
the
worn

parts
with

new
ones

Clean
it

Replace
it

with
a

new
one

Previously
mentioned

Replace
the
oil
with

proper
one
and

change
the

ftIter
elemerit

Replace
the
air

cleaner
element

Previously
mentioned

ENGINE

Improper
air
fueled
mixtur

into

cylinder
walls
Check
the
fuel

system

Seizure
of

sliding

parts
Lkl
rease
of
oil

pressure
Previously
mentioned

Insufficient

clearances
Reassemble
with
the

designated
clear

ances

Overheat

Previously
mentioned

Improper
fuel
mixture
Check
the

fuel
system

SERViCE
JOURNAL
OR

6UU
ETIi
l
REFERENCE

DATE
JOURNAL
or

BULLETIN
No
PAGE
No
SUBJECT

ET
34

1t

Water

pump

knocking

II
Other
mechanical

trouble

Sticked

valve

Seized

valve

seat

Excessively
worn

cylinder
and

piston
ENGINE

MECHANICAL

Improper
shaft
end

play

Broken

impeller

Improper
valve
clearance

Insufficient
clearance
between

valve
stem

and

guide

Weakened
or
broken
valve

spring

Biting
or

damage
ofvalve

stem

Poor
fuel

quality

Improper
valve

clearance

Weakened
valve

spring

Thin

valve
head

edge

Narrow
valve
seat

Overheat

Over

speeding

Sticked

valve

guide

Shortage
of

engine
oil

Dirty

engine
oil

Poor

oil

quality

Overheat

Wrong
assembly
of

piston
with

connecting
rod

Improper
piston
ring
clearance

Dirty
air

cleaner

Too

rich
mixture

Engine
over
run

Slicked
cho
e
valve

Over

choking

EM
39
Replace

Replace

Adjust

Clean
stem
or

ream
the

guide

Replace

Replace
or
clean

Use

good
fuel

Adjust

Replace

Replace
valve

Reface

Repair
or

replace

Drive
under

proper
speed

Repair

Add
or

replace
oil

Check
oil
level

on

daily
basis

Clean
crankcase

replace
oil

and

re

place
oil
fIlter
element

use

right
oil

Repair
or

replace

Repair
or

replace

Adjust

Clean

periodically

Adjust

Drive

correctly

Clean
and

adjust

Start
in

correct

way

ENGINE
ElECTRICAL
SYSTEM

SPECIFICATIONS

Make
and

type

Primary
voltage
v

Spark

gap
mm
in

Primary
resistance

at
200C
680

F
n

Secondary
resistance

at
200C
680F
Kn

External
resistor

at
200C
680
F
n

Applied
resistor
HANSHIN
HITACHI

H5
15
2
C6R
601

12
12

more
than
7

more
than
7

0
28
0
28

1
17
to
I
43
l
l
7

to
I
43

11
2
to
16
8
11
2

to
16
8

l
3tol7
l
3tol7

RC
15
5560R
151O

SPARK
PLUG

CONTENTS

DESCRIPTION

INSPECTION

CLEANING
AND

REGAP
EE
37

EE
37

EE
38

DESCRIPTION

The

spark
plugs
are
of
the
resister

type
having
14
mm

0
551
in
threads
and
0
8
to
0
9
mm
0
031
to
0
Q35
in

gap

Note
All

spark
plugs
installed
on
an

engine
must

be
of

the

same
brand
and
number
of
heat

range

INSPECTION

1
Remove

spark
plug
wire

by
pulling
on
boot
not
on

wire
itself

2
Remove

spark
plugs

3

Check
electrodes
and
inner
and
outer

porcelains
of

plugs
noting
the

type
of

deposits
and
the

degree
of

electrode
erosion

Refer
to

Figure
EE
74

Normal
Brown

to

grayish
tan

deposits
and

slight
elec

trode
wear
indicate
correct

spark

plug
heat

range
SPECIFICATIONS
AND

SERVICE
DATA

TROUBLE

DIAGNOSES
AND

CORRECTIONS
EE
38

EE
39

Carbon
fouled

Dry
fluffy
carbon

deposits
on
the

insula

tor
and

electrode
were

mostly
caused

by
slow

speed

driving
in

city
weak

ignition
too
rich
fuel
mixture

dirty
air

cleaner
etc

H
is

advisable
to

replace
with

plugs
having
hotter
heat

range

Oil
fouled
Wet

black

deposits
show

excessive
oil

en

trance
into
combustion

chamber

through
worn

rings

and

pistons
or
excessive

clearance
between

valve

guides

and

stems
If
the
same

condition
remains

after

repair

use
a

hotter

plug

Overheating
White
or

light
gray
insulator
with
black

or

gray
brown

spots
and

bluish
burnt
electrodes
indicate

engine

overheating
Moreover
the

appearance
results

from
incorrect

ignition
timing
loose

spark
plugs
low

fuel

pump
pressure
wrong
selection

of
fuel
a

hotter

plug
etc

H
is
advisable
to

replace
with

plugs
having
colder

heat

range

EE
37

ENGINE

Overheating

Normal
Carbon
fould

Fig
EE
74

SpaTk
plug
Life

4

After

cleaning
dress
electrodes
with
a

small
fine
fIle

to
flatten
the
surfaces
of
both

center
and
side
electrodes

in

parallel
Set

spark

plug
gap
to

specification

5

Install

spark
plugs
and

torque
each

plug
to
1
5

to
2

0

kg

m
ll
to
15
ft
lb

6
Connect

spark
plug
wires

CLEANING
AND
REGAP

Clean

spark
plugs
in
a

sand
blast

type
cleaner
Avoid

excessive

blasting
Clean
and
remove
carbon

or
oxide

deposits
but
do
not
wear

away

porcelain
If

deposits
are

too
stubborn
discard

plugs

Mter

cleaning
spark

plugs
renew

firing
surface

of

electrodes
with
me
mentioned
above
Then

gap
spark

plugs
to
0
8
to

0
9
mm
0

030
to
0
035

in

using
a
round

SPECIFICATIONS
AND
SERVICE
DATA

Make

Model

Size
Screw
dia

x
Reach

mm
in

Plug
gap
mm
in

Tightening

torque
kg
m
ft
b

EE
38
wire

feeler

gauge
All

spark

plugs
new
or
used
should
have

the

gap
checked
and
reset

by
bending
ground
electrode

Fig
EE
75

Setting
spaTk
plug
gap

NGK

HITACHI

BP5ES
1A6PW

14
x

19
0
55
x
0

75

0

8
to
0

9
0
031
to
0
035

1
5
to

2
5
11
0
to
15
0