Motor2u.com - Normal tap water will corrode the radiator and cause the whole cooling system to fail. PRO TIP - For a hot country like Malaysia, it is not neccesary to put
![Amazon.com: Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack , (Packaging May vary) : Everything Else Amazon.com: Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack , (Packaging May vary) : Everything Else](https://m.media-amazon.com/images/I/615NDvVHQAL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack , (Packaging May vary) : Everything Else
![coolant - Flushing built up Rust and Mineral Deposits in Cooling System - Motor Vehicle Maintenance & Repair Stack Exchange coolant - Flushing built up Rust and Mineral Deposits in Cooling System - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/lCUxq.jpg)