👉 Cap fluid, also known as coolant or antifreeze, is a specialized liquid used in automotive cooling systems to maintain optimal engine temperature. It serves multiple critical functions: it absorbs heat from the engine and transfers it to the radiator, where it is dissipated through airflow; it prevents the coolant from freezing in cold temperatures and boiling over in hot conditions; and it protects engine components from corrosion by acting as a barrier between metal surfaces. Typically composed of a mixture of water and ethylene glycol or propylene glycol, cap fluid ensures the engine operates efficiently and safely across a wide range of temperatures.
