For 1990-2009 cars

### Removal Procedure

1. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Remove the heater hoses. Refer to Heater Hoses Replacement .
3. Remove the clamps and the heater hoses from the heater water flow control/bypass valve.

### Installation Procedure

1. Install the heater hoses and clamps on the heater water flow control/bypass valve.
2. Install the heater hoses. Refer to Heater Hoses Replacement .
3. Fill the engine cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.