Honda Civic manuals

Honda Civic Service Manual: Spark Plug Inspection (R18A9)

Honda Civic Service Manual / Powertrain / Engine / Ignition System / Spark Plug Inspection (R18A9)

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 (Natural Gas Model)

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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.

Spark Plugs

NGK:

SILKR8B8DS

Electrode Gap

Standard (New):

0.7-0.8 mm (0.028-0.031 in)


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.

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