Expansion Tanks
Engine cooling systems must be quiet, light, efficient, space-saving and reliable - the less they are noticed, the better.
The recovery bottle is used to collect the expanding coolant from the coolant circuit. Due to the expansion of the coolant, a high coolant temperature leads to an increase in pressure in the cooling system. The increase in pressure is relieved by means of a valve integrated in the cap on the recovery bottle. If the pressure increases, the system pressure is relieved by means of the valve and returned to a pre-set value. When the coolant temperature is normalised, a vacuum is created in the cooling system. As a result, the vacuum compensation valve is opened in the cap of the bottle. Ambient air flows into the bottle until the pre-set system pressure is reached again.
