Honda Civic Service Manual: Spark Plug Inspection (R18Z1)

Honda Civic Service Manual / Powertrain / Engine / Ignition System / Spark Plug Inspection (R18Z1)

1.	Engine Cover

Remove the engine cover.

2.	Ignition Coil

Remove the ignition coils.

3.	Spark Plug

Remove the spark plugs.

1.	Spark Plug - Inspection

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Inspect the electrodes and the ceramic insulator.

Burned or worn electrodes may be caused by these conditions:

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Advanced ignition timing

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Loose spark plug

－

Plug heat range too hot

－

Insufficient cooling

Fouled plugs may be caused by these conditions:

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Retarded ignition timing

－

Oil in combustion chamber

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Incorrect spark plug gap

－

Plug heat range too cold

－

Excessive idling/low speed running

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Clogged air cleaner element

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Deteriorated ignition coils

Replace the plug at the specified interval, if the center electrode (A) is rounded, if the spark plug gap (B) is out of specification, or if the spark plug electrode is dirty or contaminated. Use only the spark plugs listed.

NOTE:

Do not adjust the gap of iridium tip plugs.

Do not use a plug cleaner.

USA and Canada models
Spark Plugs
NGK:	DILZKR7B11GS
DENSO:	DXU22HCR-D11S
Electrode Gap
Standard (New):	1.0-1.1 mm (0.039-0.043 in)

Mexico models
Spark Plugs
NGK:	SILZKR7C11S
Electrode Gap
Standard (New):	1.0-1.1 mm (0.039-0.043 in)

USA and Canada models

Mexico models

1.	Spark Plug

Apply a small amount of anti-seize compound to the plug threads, and screw the plugs into the cylinder head, finger tight, then tighten the plugs to the specified torque.

Specified Torque:
18 N·m (1.8 kgf·m, 13 lbf·ft)

2.	Ignition Coil

Install the ignition coils.

3.	Engine Cover

Install the engine cover.

Spark Plug Inspection (R18A9)

1. Engine Cover 1. Remove the engine cover. 2. Ignition Coil ...

Intake and Forced Induction

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Honda Civic Service Manual: Spark Plug Inspection (R18Z1)

Spark Plug Inspection (R18A9)

Intake and Forced Induction

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