For 1990-2009 cars

### Removal Procedure

1. Relieve the pressure in the coolant reservoir by turning the coolant reservoir cap slightly counterclockwise.

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

2. Disconnect the negative battery.
3. Remove the variable intake system (VIS) vacuum tank. Refer to Intake Manifold Tuning Valve Vacuum Reservoir Replacement .
4. Disconnect the engine coolant temperature (ECT) sensor connector.
5. Remove the ECT sensor from the cylinder head.

### Installation Procedure

1. Coat the threads of the ECT sensor with sealer.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the ECT sensor.

Tighten
Tighten the ECT sensor to 17 N·m (13 lb ft).

3. Connect the ECT connector.
4. Install the VIS vacuum tank. Refer to Intake Manifold Tuning Valve Vacuum Reservoir Replacement .

Tighten
Tighten the VIS vacuum tank retaining bolts to 8 N·m (71 lb in).

5. Connect the negative battery cable.
6. Fill the coolant system.