For 1990-2009 cars

### Removal Procedure

Caution: Allow the engine to cool before servicing the secondary air injection AIR system in order to reduce the chance of severe burns.

1. Disconnect the AIR vacuum hose.
2. Remove the AIR check valve crossover pipe, the clamps, and the bolt.
3. Remove the AIR check valve nuts.
4. Remove the AIR check valve front bracket and the bolt.
5. Remove the AIR check valve pipe adapters.

### Installation Procedure

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.

1. Install the AIR check valve pipe adapters.

Tighten
Tighten the AIR Check Valve pipe adapters to 30N·m (22 lb ft).

2. Install the AIR check valve front bracket, the bolt, and the nut.

Tighten
Tighten the bolt and the nut to 25 N·m (18 lb ft).

3. Install the AIR check valve.

Tighten
Tighten the AIR check valve to 20 N·m (15 lb ft).

4. Install the AIR check valve nut.

Tighten
Tighten the nut to 10 N·m (89 lb in).

5. Install the AIR check valve crossover pipe, the clamps, and the bolt.

Tighten
Tighten the bolt to 10 N·m (89 lb in).

6. Install the AIR vacuum hose.