cleaning rust out of cooling system

Flushing built up Rust and Mineral Deposits in Cooling System- cleaning rust out of cooling system ,Flush with distilled water. At this point you should see all sorts of rust, mineral deposits, and miscellaneous crud loosened by the citric acid come out of the drain hole. Refill the system with the appropriate mix of coolant and distilled water.Rust Removal From a Cooling System | It Still RunsThe antifreeze has lubricating components to keep rust from forming in the radiator and the entire cooling system. After a period of time, antifreeze breaks down and does not cool or lubricate the system as well. This increases mineral deposits in the radiator, reduces the flow of liquid and creates rust inside.