What causes loss of power and white smoke from the tailpipe?

Loss of power and white smoke from the tailpipe typically indicates that coolant is entering the engine's combustion chamber, often due to a blown head gasket, a cracked engine block, or a damaged cylinder head. This coolant vaporizes during combustion, producing white smoke. Additionally, the presence of coolant can lead to reduced engine performance, causing a noticeable loss of power. It's crucial to address these issues promptly to prevent further engine damage.