The merged cooling liquid should not be applied repeatedly. Cooling liquid is toxic and should not merge in household musoropriyemnik at all and the sewerage!
Cooling liquid should be replaced each time at performance of the repair work connected with an oporozhneniye of system of cooling, and also works on replacement of components of the engine, - in the course of circulation of cooling liquid anticorrosive additives entering into its structure are besieged on a surface of new details, forming the protective layer preventing development of corrosion.