Pakkasöljyt

Pakkasöljyt, also known as antifreeze or coolant, are essential fluids used in internal combustion engines to regulate temperature. Their primary function is to prevent the engine from overheating during operation and to prevent the coolant from freezing in cold weather conditions. This dual action is crucial for maintaining optimal engine performance and preventing damage caused by extreme temperatures.

The composition of pakkasöljyt typically involves a mixture of ethylene glycol or propylene glycol and water. Ethylene glycol is widely used due to its effectiveness in lowering the freezing point and raising the boiling point of water. Propylene glycol is often considered a less toxic alternative, making it a preferred choice in certain applications. Additives are also incorporated into the mixture to provide corrosion protection for engine components, lubricate the water pump, and prevent the formation of scale and deposits.

The concentration of glycol in the pakkasöljy mixture directly influences its freezing and boiling points. A 50/50 mixture of glycol and water is common and provides a good balance of freeze protection and heat transfer capabilities for most climates. However, higher concentrations of glycol may be used in extremely cold regions to achieve lower freezing points.

Regular maintenance and replacement of pakkasöljyt are vital for engine longevity. Over time, the additives can degrade, and the coolant can become contaminated, reducing its effectiveness. Manufacturers usually recommend specific intervals for flushing and refilling the cooling system with fresh pakkasöljy to ensure continued protection against freezing and overheating.