Checking the coolant level
Despite the presence of a coolant level temperature warning light, you should not completely rely on it and check the coolant level in the expansion tank in the engine compartment from time to time.
The correct check of the coolant level can only be carried out with the engine stopped. The liquid level is visible through the transparent tank even when the lid is closed. When the engine is cold, it should be at the level of the arrowhead on the side of the tank, and if the car is new, at the mark "min" expansion tank.
When the engine is warm, the level should be slightly higher.
Adding coolant
A noticeable loss of coolant indicates a defect or damage. No coolant is consumed or evaporated from the closed cooling system. Only when the engine overheats can a little coolant escape through the expansion tank cap.
There is a risk of injury from hot steam when opening the expansion tank cap on a warm engine, so proceed with caution.
Turn the cover through a rag or glove first one turn and bleed off excess pressure in the cooling system. Only then completely unscrew the cover.
If water is topped up, the coolant will gradually dilute, so you need to top up the coolant.
Do not add fluid above the mark, as the fluid expands when heated and the excess flows out of the system.
Small amounts of fluid can be added to the reservoir both when the engine is warm and when the engine is cold.
With a significant loss of fluid and a warm engine, cold fluid should not be added to the expansion tank, as this can lead to warping of the cylinder head or a crack in the cylinder block.
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