To prevent the engine from getting too hot the cooling water has the job of conducting away the heat generated by its operation, both in conditions of extreme winter cold and in the full heat of summer.
If the cooling system is to work reliably the fine channels in the engine block must be kept free of any accumulation of contaminant. This is where cooling liquid filters show their capability. They filter the suspended particles out so that only clean cooling water flows through the capillaries in the engine. This guarantees the best cooling of the engine.