What are the signs that coolant needs to be replaced?

[VanAdriana]

Here are the signs that coolant needs to be replaced: 1. Seeing impurities or flocculent substances in the coolant reservoir. 2. If the freezing point of the coolant is insufficient when tested with a freezing point tester, you should consider replacing the coolant. Here is some relevant information about coolant: 1. Coolant, also known as antifreeze, is an essential part of a vehicle's cooling system. 2. Many vehicle manuals no longer specify a coolant replacement interval, often stating 'inspect regularly and replace as needed,' or 'this vehicle uses long-life coolant and does not require replacement for 10 years or 200,000 kilometers.' 3. Some original coolant bottles indicate on the back that the coolant should be diluted with purified water in a specific ratio before use.