3.0 Car radiator without air conditioning
1 - fastening latches
2 - supercharger air radiator (intercooler)
3 - self-tapping screws
4 - fastening of the supercharger radiator
3.0a Car radiator with air conditioning
5 - radiator guides
6 - evaporator
7 - mounting bolt
A certain pressure is created in the cooling system. The expansion tank cap has a valve that opens when the system pressure reaches a certain value (1.4 bar). To check the condition of the expansion tank cap, a special device (a pump) is required to create the required pressure. The expansion tank cap is screwed onto the pump, which pumps air until the release valve on the cap opens. The valve opening must occur within the nominal values of excess pressure. If the valve operates at other pressure values, the cover must be replaced.
The expansion tank cap valve test pump can be used to test the cooling system for leaks. To do this, the pump is attached to the filler neck of the radiator or expansion tank. The device creates a pressure of approximately 1.0 bar in the system. Monitor the device to ensure the pressure in the system remains at this level for at least 2 minutes. If the pressure drops during this time, the system is not sealed and a leak is occurring. The location of the leak is fairly easy to determine by the liquid escaping under pressure.
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