What Causes Rapid Coolant Consumption Without Visible Leaks?

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Here are the specific reasons for rapid coolant consumption without visible leaks in vehicles: 1. Radiator Damage: Poor sealing of the upper and lower water chambers can cause coolant leakage. Regularly inspect all sealing points and connections. 2. Loose Pipe Fittings: Loose or poorly sealed connections at the overflow tank, water pump mating surfaces, and coolant system pipe fittings can lead to coolant leakage. 3. Cylinder Malfunction: Cylinder head gasket failure, excessive flatness deviation/warping of cylinder head-to-block mating surfaces, or loose cylinder head bolts may allow high-temperature/high-pressure gases to enter the cooling system, causing rapid coolant loss.