What Causes Smoke and a Burning Smell from the Engine?
2 Answers
Smoke and a burning smell from the engine may be caused by an oil leak due to evaporation from high engine temperatures. The car engine is the device that provides power to the vehicle, acting as the heart of the car, determining its power, fuel efficiency, stability, and environmental performance. The engine is the power source of the car, and most car engines are thermal power devices, commonly referred to as heat engines. Heat engines convert the thermal energy generated by fuel combustion into mechanical energy through changes in the state of the working medium. Solution for oil leaks: If the oil leak is from the valve cover gasket, it may be due to aging of the gasket. You can inspect the valve cover gasket, and if it is indeed aged, you can replace it. It is important to note that the old gasket and sealant must be thoroughly cleaned to ensure better sealing performance during use. If you are unable to handle it yourself, you can visit a professional repair shop.
Seeing smoke from the engine and smelling something burning is all too familiar—I’ve encountered it a few times over a decade of driving. The most likely cause is engine oil leaking onto the hot exhaust manifold and igniting, often due to worn-out seals or gaskets. That burnt oil smell is particularly pungent. Another possibility is an electrical short, which can produce smoke and a scorched odor, like when wiring insulation melts due to aging. Coolant leaks can also lead to similar issues, especially if the cooling fan fails and the engine overheats. The key is not to push your luck—pull over immediately, turn off the engine, and avoid any sparks that could ignite something worse. Afterward, check for oil leaks or trace the source of the smell, and take it to a professional repair shop if needed.
