In addition to supplying the circuit, the coolant reservoir absorbs fluctuations in coolant volume as engine temperature changes.A special calibrated valve in the pressurised plug allows:
the emergence of air from the collection circuit through a pipe leading from the thermostat.
air intake when the circuit contains a vacuum (due to engine cooling).
ENGINE COOLING RADIATOR
Composition
Structure
This consists of a radiant mass and a side reservoir for coolant intake and outlet.The radiant mass pipes and fins aer in aluminium. The reservoir is plastic.