Spark Plug Inspection - Honda Accord 2008 Manual

07/11/02 09:05:28 61TA0000_040_0023
Ignition System

Spark Plug Inspection

1. Remove the spark plugs, and inspect the electrodes
and the ceramic insulator.
• Burned or worn electrodes may be caused by
these conditions:
– Advanced ignition timing
– Loose spark plug
– Plug heat range too hot
– Insufficient cooling
• Fouled plugs may be caused by these conditions:
– Retarded ignition timing
– Oil in combustion chamber
– Incorrect spark plug gap
– Plug heat range too cold
– Excessive idling/low speed running
– Clogged air cleaner element
– Deteriorated ignition coils
＊０１
Worn or deformed
electrodes
Damaged
gasket
Cracked
insulator
2. If the spark plug electrode is dirty or contaminated,
clean the electrode with a plug cleaner.
NOTE:
• Do not use a wire brush or scrape the iridium
electrode since this will damage the electrode.
• When using a sand blaster spark plug cleaner, do
not clean for more than 20 seconds to avoid
damaging the electrode.
4-22
3. Replace the plug at the specified interval, or if the
center electrode is rounded (A), or if the spark plug
gap (B) is out of specification. Use only the spark
plugs listed.
NOTE: Do not adjust the gap of iridium tip plugs.
All models except PZEV
Spark Plugs
NGK:
DENSO: SXU22HCR11S
Electrode Gap
Standard (New): 1.0 1.1 mm (0.039 0.043 in.)
PZEV model
Spark Plugs
NGK:
Electrode Gap
Standard (New): 1.0 1.1 mm (0.039 0.043 in.)
All models except PZEV
• Improper gap
• Oil-fouling
• Carbon deposits
• Cracked center
electrode insulator
PZEV model
4. Apply a small amount of anti-seize compound to
the plug threads, and screw the plugs into the
cylinder head, finger-tight. Torque them to 18 N·m
(1.8 kgf·m, 13 lbf·ft).
ＴＡ０８ＡＥ４Ａ２６１０００５５９０１ＭＡＡＴ００
ILZKR7B-11S
− −
DILZKR7A11GS
− −
A B
B
A
＊０２
＊０３