Spark Plug Inspection - Honda Civic Service Manual

Spark Plug Inspection
1 . Inspect the electrodes and ceramic insulator.
Burned or worn electrodes may be caused by:
. Advanced ignition timing
. Loose spark plug
. Plug heat range too hot
. I n s u f f i c i e n t c o o l i n g
Fouled plug may be caused by:
. Retarded ignition timing
. O i l i n c o m b u s t i o n c h a m b e r
. Incorrect spark plug gap
. Plug heat range too cold
. Excessive idling/low speed running
. C l o g g e d a i r c l e a n e r e l e m e n t
. Deteriorated ignition coils
Worn or deformed
electrodes
Do not adjust the gap of iridium tip plugs (A);
replace the spark plug if the gap is out of
specification.
Electrode Gap:
Standard (New):
1.0 1.1 mm
{0.039-0.0€ in.)
Service Limit:
1.3 mm {0.051 in.l
f .lmproper gap
I J . O i l - t o u l i n g
r- 1 . Cs6on deposits
'
I . Cracked center
\ electrode insulator
L
3. Replace the plug at the specified interval, or if the
center electrode is rounded {A). Use onlV the spark
plugs listed below.
Spark Plugs: lZFR6Kl1 (NGK)
SKJ2ODR-M11 (DENSO)
Apply a small quantity of anti-seize compound to
the plug threads, and screw the plugs into the
cylinder head finger-tight. Then torque them to
1 8 N m ( 1 . 8 k g f . m , 1 3 l b f f t ) .
4 .
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