Mazda 121 - Spark Plugs Removal;Installation; Spark Plugs Inspection

IGNITION
SYSTEM
)x
SPARK PLUGS
Removal / Installation
1. Remove and install the
high-iension leads carefully.
Caution
.
When the spark
plug
lead is to be
pulled
ofi,
pull
on the boot
itself, not the wire.
2.
Remove and
instail the spark
p
ug
with
a
plug
socket.
Caution
.
Be sure the socket
must be tit squarely over
lhe
spark
plug.
3. Apply antiseize compound or
molybdenum-based lubricant
to the spark
plug
threads.
4. Tighten the
spark
plug
to the specified torque.
Tightening
lorque:
15-23 N.m
(1.5-2.3
m-kg, 11-17 ftlb)
Inspection
1.
Remove
the
spark
plug.
2. Connect lhe spark
plug
10
a high-tension
lead.
3. Hold the highiension lead
wth insulated
pliers
5-1omm
(0,20-0,39
in) from a
ground.
4. Crank the engine and verify that there
is a strong blue spark.
Note
.
It there
is no spark, replace the spark
plug
or high"
tension
lead
as necessary.
5. Checkthe
following. lf
a
problem
isfound,
replace the spark
plug.
.
Damaged
insulation
.
Worn electrodes
.
Carbon deposits
ll cleaning is necessary, use
a
plug
cleaner or a
wtre
brush. Clean the upper
insulator also
.
Damaged
gasket
.
Burned condition
Plug
gap:
1,0-1,lmm
(0.039-0.043
in)
CAFBON
BURNED
G-19