How to remove the water valve of BMW 523 heater?

1. First of all, turn off the vehicle and control the temperature in a cold state to prevent the skin from being burned by high-temperature coolant.

2. Secondly, remove the reinforcing tie rod at the front of the engine compartment, and remove the engine air cleaner housing and the front intake pipe.

3. Finally, remove the pressurized air pipe in front of the throttle valve, remove the plug of the warm water valve, and loosen the clamp on the warm water valve with the clamp pliers for special hoses for automobiles.