1969 DATSUN B110 overheating

Icnition
Sptem

Ovcrhc
Jtmg

Norm
Jl
i
r

rJ
I

ttr
I
i

V

Carbon
fould

Fig
85

Spark
plug
Life

plug
heat

range

Carbon
fouled

Dry
fluffy
carbon

depo
lts
on

the

Insulator
and
electrode

were

mostly

caused

by
slow

speed
dnvlng
In

cIty
weak

Ig

nltlOn
too
nch
fuel

mixture

dirty
aIr
cleaner

etc

It
IS
advIsable
to

replace
WIth

plugs
havmg

hotter

heat

range

011

fouled
Wet
black

depoSits
show

excesSive

oIl
entrance

Into
combusllon

chamber

through

worn

rmgs
and

pIstons
or
excessIve
clearance

between
valve

gUIdes
and

stems
If
the

same

condition

remams
after

repair
use
a
hotter

plug

Overheatmg
WhIte

or

hght
gray
msulator

WIth

black
or

gray
brown

spots
and

blUIsh

burnt
electrodes
indIcate

engme
overheatIng

Moreover
th
e

appearance
results
from
in

correct

IgnitIon

tIming
loose

spark
plugs
low

guel
pump
pressure
wrong
selectIOn

of
fuel
a

hotter

plug
etc

It
IS
adVisable
to

replace
WIth

plugs

havmg

colder

heat

range

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
FIg
86

Settmg
spark

plug
gap

Install

spark
plugs
and

torque
each

plug
to
11

to
15
ft
Ib

Connect

spark
plug
wires

Cleaning
and

Regap

Clean

spark
plugs
In

a
sand

blast

type

cleaner
A
VOId

excessIve

blasting
Clean
and

remove
carbon

or
OXide

depoSits
but
do
not

wear

away
porcelain
If

depos1ts
are
too

stub

born
discard

plugs

After

cleaning
spark
plugs
renew

firing
sur

face
of
electrodes
With
file

mentioned
above

Then

gap
spark
plugs
to
0
030
to
0
035
In

uSing
a
round

wire
feeler

gauge
All

spark

plugs
new
or
used
should

have
the

gap

checked
and
reset

by
bending

ground

electrode

II

r
Brakes

Moreover
In
order
to

prevent
brake

squeahng
a
shIm

IS
Inserted
behind
the

pad

BRAKE
PAD

Replacement

Jack

up
front
UnIt
of
the
vehicle
and
remove

the
front
wheel

Remove

clip
from
the

retaining
pin
and

sup

porting
the
brake

pad
remove
the

retaining

pin
and
COil

spring

Unhook
the

hanger
spring
and
Withdraw
the

brake

pad
and
shim
With
a

pair
of

phers

Note
When
the
brake

pad
IS
removed
do

not

depress
the
brake

pedal
or
otherWise

the

piston
will
come
out

Inspection

Clearance
between
the
brake

pad
and
rotor
IS

adjusted
automatically
Check
the
brake

pad

Fig
115

WIthdraWing
brake

pad
and
shIm
for

wear
after
the
first
6
000
miles

driVing

and

every
3
000
miles
thereafter

Clean
the
brake

pad
With
carbon

tetrachloride

or

gasohne

When
011
and
or

grease
IS

heavIly
stlcked
on

the

pad
or
when
deteriorated
or
deformed
due

to

overheating
replace
the

pad
With
a
new

one

When
thickness
of
the
friction
material

pad

IS
less
than
0
0630
In

replace
Replace
when

total

pad
thIckness
IS
less
than

0
2402
In

Note

Replace
pads
as
a
set

Replacement

at

only
one

position
may
cause
uneven

brake
effect
It

IS
recommended
that

rotation
of

pads
be
made

periodically

Check
the
rotor

Reinstallation

Clean
the

calipers
and

piston
pad
installing

parts

Note
Do
not

use
mineral
oil
Be
careful

not
to

apply
oil

on
the
rotor

Depress
the

pIston
Into
the

cyhnder
so
that

new

pad
can
be
Installed

Note
a
Note
that
brake
fluid

may
over

flow
from
the
reservoir
It
is
recommen

ded
that

operation
be
carried
out

by

loosening
the
breather
to
release
brake

fluid

b
The

piston
can
be

easily
pushed
in

by

hand
But
if

pushed
excessively
the

Fig
116

DepreSSion
piston
A
and
B
Into

cylinder

88

f
Vltl

vf

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AUTOBODYREP
IRINGANDREFINISHIiilG

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