For 1990-2009 cars

### Removal Procedure

Warning: Refer to Battery Disconnect Warning in the Preface section.

1. Disconnect the negative battery cable.
2. Drain the engine oil from the engine crankcase.
3. Disconnect the rear heated oxygen (HO2S) sensor.
4. Remove the catalytic converter upper flange nuts from the exhaust manifold and the bolts from the bracket.
5. Remove the nuts from the front muffler pipe to the connecting pipe.
6. Remove the oil pan retaining bolts.
7. Remove the oil pan from the engine block.

### Installation Procedure

1. Make sure that the oil pan and mounting surface on the engine block are free of all oil and debris.
2. Install the oil pan gasket to the oil pan.

Note: Install the oil pan within 5 minutes after applying liquid gasket to the oil pan.

3. Install the oil pan to the engine block.

Caution: Refer to Fastener Caution in the Preface section.

4. Install the oil pan retaining bolts.

Tighten
Tighten the oil pan retaining bolts to 10 N·m (89 lb in).

5. Install the catalytic converters-to-exhaust manifold nuts.

Tighten
Tighten the catalytic converter-to-exhaust manifold nuts and bracket bolts to 40 N·m (30 lb ft).

6. Install the nuts from the front muffler pipe to the connecting pipe and catalytic converter.

Tighten
Tighten the front muffler-to-connecting pipe nuts to 30 N·m (22 lb ft).

7. Connect the rear heated oxygen sensor connector.
8. Connect the negative battery cable.
9. Discard the used oil pan drain plug washer and replace it with a new one.
10. Install the oil pan drain plug.

Tighten
Tighten the oil pan drain plug to 35 N·m (25 lb ft).

11. Refill the engine crankcase with engine oil.