When the exhaust emits white smoke is the engine gone?

White smoke from the exhaust can indicate several issues, but it doesn't necessarily mean the engine is beyond repair. Common causes include a coolant leak into the combustion chamber, often due to a blown head gasket, or condensation in the exhaust system, especially in colder weather. It's important to diagnose the issue accurately; immediate attention can prevent further damage. Consulting a mechanic for a thorough inspection is recommended.