DIY cleaning the radiator spare tank in progress...My personal choice is Toyota Coolant, i have been using it from day one. The tips how to clean your radiator water spare tank is to put some or hand full of sand inside the tank but you have to remove the tank from the engine bay first!!! and shake...shake it hard....that it, now you have sparkling clean tank like mine...btw i use RO water with 50/50 mixture...
