Warm up the engine until the expansion tank becomes warm to the touch.
Open the expansion tank cap carefully.
Caution: Do not open the cover when the engine is hot, see. "Checking the coolant level".
Suck in the coolant with a densimeter and determine its density by the position of the float. In our latitudes, the concentration of antifreeze should prevent the coolant from freezing to at least -25°C.
Adding antifreeze from VAG.
To protect against freezing down to -25°C, the coolant must contain 40% antifreeze. If the coolant must withstand temperatures down to -35°C without freezing, the ratio of antifreeze to water must be 1:1. Use only genuine VAG antifreeze of the G-011-VBC brand. The table below shows how much antifreeze must be added to ensure a favorable antifreeze to water ratio.
The information is posted on this website www.VWmanual.ru
Example: Measuring the concentration of antifreeze in the cooling system of a 4-cylinder engine showed that the coolant is guaranteed against freezing to a temperature of -5°C. In this case, 3 liters of coolant must be drained from the cooling system and 3 liters of clean antifreeze must be added to the system. As a result, the coolant will not freeze to a temperature of -25°C. To protect the liquid from freezing to a temperature of -35°C, 3.5 liters of coolant must be replaced with clean antifreeze.
Close the expansion tank cap and, after a test drive, check the concentration of antifreeze in the coolant again.
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