Mercedes expansion tank

In order to exhaust the gas in the cooling system, the cooling system can also supply the corresponding coolant, by increasing the pressure of the cooling system to increase the pressure of the pump, is also to prevent the harm of pump cavitation。Note: the radiator cover must be reliably sealed, if the seal is not tight, the cooling system can not build up the internal vacuum, it can not play the role of internal circulation compensation. In addition to pay attention to the expansion tank cover and gasket on the vent holes do not be blocked, must be kept unblocked, otherwise it will not be able to build because of pressure difference, causing the expansion of the cooling fluid can not flow back into the tank. When cooling liquid is first injected into the expansion tank, 2/3 of cooling liquid should be injected into the expansion tank to ensure the normal operation of the system.