How can a car engine burn coolant?

A car engine can burn coolant if there is a breach in the head gasket, allowing coolant to enter the combustion chamber. This can also occur due to cracks in the engine block or cylinder heads, which can lead to coolant mixing with fuel and air during combustion. When this mixture ignites, it can produce white smoke from the exhaust, indicating that coolant is being burned. Additionally, burning coolant can lead to decreased engine performance and potential long-term damage.