For 1990-2009 cars

## Spark Plug Replacement 2.0L

### Removal Procedure

Notice: This engine is equipped with an aluminum cylinder head. Allow the engine to cool before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.

1. Disconnect the ignition coil connector from each spark plug coil (1).
2. Remove the bolt and the coil for each cylinder.
3. Remove the spark plugs from the cylinder head.
4. Inspect the spark plugs for electrode wear, carbon deposits and insulator damage. Refer to Spark Plug Visual Diagnosis .

### Installation Procedure

1. Set the spark plug gap to 1.0-1.1 mm (0.039-0.043 in).

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 plugs to the cylinder head.

Tighten
Tighten the spark plug to 25 N·m (19 lb ft).

3. Install the ignition coil to each spark plug. Secure with the bolt.

Tighten
Tighten the ignition coil bolts to 10 N·m (89 lb in).

4. Connect the ignition coil electrical connectors (1).

## Spark Plug Replacement 1.6L

### Removal Procedure

Notice: This engine is equipped with an aluminum cylinder head. Allow the engine to cool before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.

1. Disconnect the ignition coil electrical connectors.
2. Carefully release the number 1 spark plug wire from the clip on the number 2-3 ignition coil.
3. Remove the 2 bolts from each ignition coil.
4. Remove the number 1 spark plug wire and the number 1-4 ignition coil from the spark plugs.
5. Remove the number 2-3 ignition coil and the number 3 spark plug wire from the spark plugs.
6. Remove the spark plugs from the cylinder head.
7. Inspect the spark plugs for electrode wear, carbon deposits and insulator damage. Refer to Spark Plug Visual Diagnosis .

### Installation Procedure

1. Set the spark plug gap to 1.0-1.1 mm (0.039-0.043 in).

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 plugs to the cylinder head.

Tighten
Tighten the spark plug to 25 N·m (19 lb ft).

3. Install the number 2-3 ignition coil and the number 3 spark plug wire to the spark plugs.
4. Install the number 4 spark plug wire and the number 1-4 ignition coil to the spark plugs.
5. Install the 2 bolts to each ignition coil.

Tighten
Tighten the ignition coil bolts to 10 N·m (89 lb in).

6. Carefully secure the number 1 spark plug wire in the clip on the number 2-3 ignition coil.
7. Connect the ignition coil electrical connectors.