For 1990-2009 cars

### Removal Procedure

Caution: Wash your hands after handling coated spark plugs and before smoking. The coating is a non-hazardous material and incidental contact will not cause any adverse effects. However, exposure to polymer vapors - the result of contamination of cigarette products and subsequent burning of the polymer - may result in flu-like symptoms and should be avoided.

1. Turn OFF the ignition or lock it.

Important: Note the positions of the spark plug wire harnesses before removing them.

2. Disconnect the spark plug wire harness from the spark.

Important: Clean the dirt and the debris from the spark plug recess areas.

3. Remove the spark plug(s).

### Installation Procedure

Notice: Be sure plug threads smoothly into cylinder head and is fully seated. Use a thread chaser if necessary to clean threads in cylinder head. Cross-threading or failing to fully seat spark plug can cause overheating of plug, exhaust blow-by, or thread damage. Follow the recommended torque specifications carefully. Over or under-tightening can also cause severe damage to engine or spark plug.

1. Install the spark plugs.

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

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the spark plug wire harness. Ensure to properly route the harness as noted during the removal procedure.