Silicates, a compound salt containing silicon and oxygen molecules, act as resistors within the fluid to raise the boiling point and reduce the freezing point. They are present in this bright green, fluorescent liquid.
The silicate in the coolant is that white gunk. This is known as silicate dropout, and it occurs when the additives in antifreeze/coolant start to degrade after being used over their recommended lifespan. A system blockage would have resulted from this goo, and the silicate is a component of the corrosion inhibitor kit. Core plugs, also known as freeze plugs, frequently leak as a result of corrosion. The coolant can contact the metal surface of the freeze plug's back. Corrosion prevention is a feature of coolant or antifreeze.
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