For 1990-2009 cars

### Removal Procedure

Notice: This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage.

1. Remove the ignition coils . Refer to Ignition Coil Replacement .

Important: Remove any water and debris from the spark plug holes before spark plug removal with compressed air.

2. Remove the spark plugs with a spark plug socket.
3. Inspect the spark plugs. Refer to Spark Plug Inspection .

### Installation Procedure

1. Gap the spark plug, using round wire type spark plug gap gage.

Gap
Adjust the spark plug gap to 1.0 mm (0.040 in).

Notice: Refer to Fastener Notice in the Preface section.

Important: DO NOT coat the spark plugs with anti-seize compound. Over torquing could occur and damage to the cylinder head threads may result.

2. Install the spark plugs with a spark plug socket.

Tighten
Tighten the spark plugs to 20 N·m (15 lb ft).

3. Install the ignition coils . Refer to Ignition Coil Replacement .