For 1990-2009 cars

### Removal Procedure

1. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the heater pipe outlet hose (1) from the heater outlet pipe.
3. Remove the heater inlet pipe. Refer to Heater Inlet Pipe Replacement .
4. Remove the heater outlet pipe (1).
5. Remove the heater outlet pipe O-ring (2). Discard O-ring.

### Installation Procedure

1. Install a NEW heater inlet pipe O-ring.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the heater outlet pipe (1).
3. Install the heater outlet hose (1) to the heater outlet pipe.
4. Install the heater inlet pipe. Refer to Heater Inlet Pipe Replacement .