Checking the level and density of liquid in the cooling system

The correct filling of the cooling system is checked by the level of liquid in the expansion tank, which, on a cold engine (at 15-20°С) should be 3-4 cm above the mark «MIN», printed on the expansion tank.

Warning: It is recommended to check the fluid level on a cold engine, since when heated, its volume increases and in a warm engine, the fluid level can rise significantly.

If necessary, check the density of the coolant with a hydrometer. For Tosol A-40 liquid, which is used on VAZ vehicles, the density should be 1.078-1.085 g / cm³.

If the liquid level in the tank is below normal, and the density is above normal, then add distilled water. If the density is normal, add the liquid of the brand that is in the cooling system.

If the density of the liquid in the cooling system is below normal, and the car will be operated in the cold season, then it is necessary to replace the coolant.