Coolant Hose A2215016784 For Mercedes W221

The auxiliary kettle of the automobile cooling system is an additional water tank, which is usually located in the engine compartment. It is a part of the cooling system, which is used to store and supply coolant.

The water pipe connecting the auxiliary kettle mainly has the following functions:

1. Replenishment and discharge of coolant: There is usually a coolant replenishment port on the auxiliary kettle, through which coolant can be added to the cooling system. In addition, there is a drain on the sub-kettle, which is used to drain the coolant in the cooling system.

2. Cooling liquid circulation: the water pipe of the auxiliary kettle is connected with other parts of the cooling system, such as the engine, radiator and water pump. Through the water pipe of the auxiliary kettle, the cooling liquid can circulate, take heat away from the engine and other heat sources, and then return to the engine after radiating through the radiator.

3. Pressure adjustment of the cooling system: There is usually a pressure relief valve on the auxiliary kettle to adjust the pressure of the cooling system. When the coolant is heated and expanded, the pressure will increase. When it exceeds a certain range, the pressure relief valve will open to release excess pressure to keep the cooling system working normally.

The water pipe of the auxiliary kettle is usually connected with the following parts:

1. Engine: The water pipe of the auxiliary kettle is connected with the cooling system of the engine to circulate the cooling liquid into the engine to reduce the temperature of the engine.

2. Radiator: The water pipe of the auxiliary kettle is connected with the radiator to guide the cooling liquid from the auxiliary kettle to the radiator so as to dissipate heat through the radiator.

3. Water pump: The water pipe of the auxiliary kettle may also be connected with the water pump to guide the coolant from the auxiliary kettle to the water pump to keep the circulation of the cooling system.

The connection mode and location of the water pipes of the sub-kettle may be different for different models and manufacturers. It is suggested that according to the vehicle maintenance manual or consulting professional and technical personnel, we should know the connection mode and function of the auxiliary kettle water pipe of a specific vehicle model.