Does Bubbling Coolant Indicate a Blown Head Gasket?

[LaHannah]

Bubbling coolant indicates a blown head gasket, which occurs when the internal seals of the engine are damaged, causing a breach between the coolant and engine oil. Prompt repairs are necessary to prevent affecting the engine's normal operation. Coolant Replacement Interval: Vehicle coolant generally needs to be replaced every 2 years or 40,000 kilometers. This is only a reference interval. For commercial vehicles with higher mileage, the replacement interval should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Monitor the coolant's condition—if levels are low, top it up promptly. If suspended particles, sediment, or signs of deterioration/discoloration are observed, replace the coolant immediately and flush the system. Coolant Composition: The main components of coolant are: 50% purified water, 40% methanol, and 10% other substances. Types of Coolant: Coolants are generally categorized into three types: ethanol-water, glycerol-water, and ethylene glycol-water.