Spark Plugs Removal/Installation; Spark Plugs Inspection - Mazda 121 Workshop Manual

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 - 1 9