Topping up of coolant antifreeze.
For total security, also in summer use the coolant z 40% admixed with antifreeze, if only water was added to the system frequently, the content of the agent in the liquid is too low for the winter. In addition, the boiling point of the coolant was reduced. In this case, add G12 antifreeze. To do this, drain the appropriate amount of liquid from the cooling system, to make room for refilling with G12. If you drive your car in a very cold climate, then the proportion of antifreeze can be increased to 60% (protection down to a temperature of about -40 ° C) but no more, because at an even higher concentration, the degree of protection deteriorates. For example, in a gasoline engine 1,6 l provides protection down to -25 ° C 40% antifreeze. i.e. 2 liters G12 and 3 liters of water; to protect to -35 C, the proportion of the measure is 50% (po 2,5 liter of water and G12). In the engine 1,9 These TDIs are respectively: (-25° / -35°C) 2,4 liter of water and 3,6 liter G12 / 3 liters of water and 3 liters G12.
Next steps:
Remove the noise reduction hood under the engine and place a clean vessel under the radiator drain valve.
Drain the necessary amount of coolant (read the section on fluid replacement).
Install the radiator hose and tighten the coolant drain valve.
Top up the appropriate amount of antifreeze in the expansion tank. If necessary, top up the level with the drained liquid.
Coolant is leaking from the system.
If the engine has lost a lot of coolant while driving, the defect cannot be replaced with cold water. The engine will then experience the so-called. thermal shock, which can lead to warping of the head. This would cause the cylinder head to leak and the coolant to enter the lubrication system. In the worst case, due to thermal shock, the engine block may crack. Wait for the engine to cool down, add water and try to find out the cause of the loss of coolant at your nearest garage.