How to clean the heater water tank of the 2011 Passat manual 2.0 without disassembling it?

1. First prepare antifreeze and Meister water tank cleaning agent, and use carp pliers to open the car's sewer pipe clamp. During the subsequent cleaning process of the water tank, you need to connect the pipe.

2. Next, open the water inlet pipe of the small heater water tank and insert the nozzle of the high-pressure air pump into the water inlet pipe of the small heater water tank.

3. Finally, open the air pump, and high-pressure air will be blown into the entire circulating water circuit, including the heater water tank pipeline. As the high-pressure air enters, the remaining dirty water in the cylinder will also be blown out. Just add detergent to clean the water tank.