Spark Plug Ee - Datsun 180B Service Manual

ENGINE
ELECTRICAL SYSTEM
DESCRI PTION
INSPECTION
CLEANING AND
REGAP
DESCRIPTION
The
spark plugs
are
of the
resIster
type
haVIng
14
mm
threads and 0 8
to
o
9
mm
gap The
inspectIOn
and clean
Ing
should
be made
penodlca1Jy
as
speCIfied
In
the Maintenance
Schedule
Note
All
spark plugs
Installed
on
an
engine
must be of the
same
brand
and number ofheat
range
INSPECTION
I Remove
spark plug
WIre
by
pulhng
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
79
Normal Brown
to
graYish
tan
de
pOSitS and shght electrode
wear
Indicate
correct spark plug
heat
range
Carbon fouled
Dry fluffy
carbon
depOSits
on
the
Insula
tor
and
electrode
were
mostly caused by
slow speed driVIng
In
city
weak
Igmhon too
rich fuel
nuxture
dirty
air
cleaner
etc
It
IS
advisable
to
replace
with
plugs
haVing hotter heat
range
Oil fouled
Wet black depOSits show
excessIVe
011
entlance mto
com
bushon chamber
through
worn
rings
and
pistons
or excessive
cledrance between valve
gUlde
and
stems If the
same condItion
remainS
after
rapalr
use a
hotter
plug
SPARK PLUG
CONTENTS
EE 32
EE 32
EE 32
SPECIFICATIONS
AND
SERVICE
DATA
TROUBLE DIAGNOSES
AND
CORRECTIONS
EE 33
Overheating
WhIte
or
hght
gray 10
sulator
wllh black
or
gray
brown
spots
and bluish burnt electrodes
indicate
engine
overheating
More
over
the
appearance
results from
Incorrect
Igmhon liming loose
Normal
Ovcrhcdlmg
4
After
cleamng
dress electrodes
with
a
small
flOe 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 I 5 to 20
kg
m
II to 14
ft Ib
6 Connect
spark plug
WIres
CLEANING
AND
REGAP
Clean
spark plugs
In
a
sand blast
EE 32
EE 33
spark plugs
low fuel pump
pres
sure wrong
selectIOn of fuel
a
hotter
plug etc
It
IS
adVisable
to replace
with
plugs
haVing
colder heat
range
Carbon fould
Life
EE079
Fig
EE 79
Spark plug
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
After
cleamng spark plugs
renew
firing
surface of electrodes
wllh file
menhoned above Then
gap
spark
plugs
to
08
to 09
ffim
00315
to
o 0354
In
uSing
a
round
wire
feeler
gauge
All
park plugs
new
or
used
should have
iile
gap
checked and
reset
by bendIng
ground electrode