Honda Civic manuals

Honda Civic Service Manual: Spark Plug Inspection (R18Z1)

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

1. Engine Cover

1.

Remove the engine cover.


2. Ignition Coil

1.

Remove the ignition coils.


3. Spark Plug

1.

Remove the spark plugs.


1. Spark Plug - Inspection

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1.

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


2.

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

1.

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

1.

Install the ignition coils.


3. Engine Cover

1.

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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See also:

Honda Civic Service Manual. Heater Unit/Core Removal and Installation (Heating)
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