Reasons for the Unexplained Reduction of Antifreeze in LaCrosse
2 Answers
LaCrosse antifreeze is reduced for no reason due to three reasons: natural loss, coolant leakage, and antifreeze entering the cylinder to participate in combustion. How to choose antifreeze: The basic indicators of antifreeze are freezing point and boiling point. There are several specifications of antifreeze freezing points on the market, such as -15℃, -25℃, -30℃, -40℃, etc. Generally, it is advisable to choose one that is more than 10℃ lower than the lowest temperature in your area. Can antifreeze be mixed: The same brand of antifreeze must be used. Different brands of antifreeze production formulas may vary. If mixed, chemical reactions are likely to occur between multiple additives, causing the additives to fail. Antifreeze replacement cycle: For vehicles that run for a long time, such as taxis, etc. Generally, high-quality antifreeze should be replaced once a year, while those with short running times can be replaced every two years or every 30,000 kilometers. To prevent excessive foam from reducing the heat exchange performance of antifreeze and engine components, confirm that the product is within the validity period when adding it. Long-lasting antifreeze can have a validity period of up to three years. If suspended matter, sediment, or deterioration and discoloration are found in the antifreeze, the system should be cleaned and replaced in time.
I often see the Buick LaCrosse's coolant level dropping for no apparent reason, which is mostly due to leaks. The radiator can develop tiny cracks as it ages, the water pump's sealing ring may wear out causing fluid leakage, or the heater core's hose connections could be loose and seeping. If the cooling system's internal pressure is too high, small amounts of coolant can evaporate, making it seem like it's disappearing without cause when it's actually a system issue. Large temperature fluctuations causing fluid level changes can also lead to misjudgment. I recommend first visually inspecting under the car for pink stains - the typical color of coolant indicating external leaks. If none are found, internal leaks like a blown head gasket mixing coolant into the engine oil could be the culprit, which may cause engine overheating or even complete failure. Early detection using a pressure tester, followed by timely refilling or part replacement, can save significant money and ensure safety.
