For 1990-2009 cars

### Removal Procedure

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

1. Remove the exhaust manifold heat shield bolts.
2. Remove the exhaust manifold heat shield.
3. Disconnect the oxygen sensor electrical connector.
4. Remove the exhaust manifold lower flange nuts.
5. Remove the front exhaust pipe bracket bolts.
6. Remove the oxygen sensor. Refer to Oxygen Sensor Replacement or Heated Oxygen Sensor 1 Replacement .
7. Remove the exhaust manifold nuts and the bolts.
8. Remove the exhaust manifold.
9. Remove the exhaust manifold gasket.

Caution: Wear safety glasses in order to avoid eye damage.

10. Clean the sealing surfaces of the exhaust manifold and cylinder head.

### Installation Procedure

1. Install the exhaust manifold gasket.
2. Install the exhaust manifold.

Notice: Refer to Fastener Notice in the Preface section.

3. Install the exhaust manifold bolts and the nuts.

Tighten
Tighten the exhaust manifold bolts and the nuts to 22 N·m (16 lb ft).

4. Install the front exhaust pipe bracket bolts and catalytic converter lower flange nuts.

Tighten

• | Tighten the front exhaust pipe bracket bolts to 40 N·m (30 lb ft).

• | Tighten the catalytic converter lower flange nuts to 40 N·m (30 lb ft).

5. Install the oxygen sensor connector.
6. Install the oxygen sensor. Refer to Oxygen Sensor Replacement or Heated Oxygen Sensor 1 Replacement .
7. Install the heat shield.
8. Install the heat shield bolts.

Tighten
Tighten the exhaust manifold heat shield bolts to 10 N·m (89 lb in).