What Causes Engine Smoke?

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Specific causes and solutions for engine smoke: 1. Black smoke: This is caused by incomplete fuel combustion, a dirty air filter, faulty spark plugs, or similar issues, all of which can lead to black smoke from the car engine. It is important to promptly observe the fault condition. If the black smoke is caused by fluid leakage, address the specific leakage point—for example, if power steering fluid is leaking, inspect and tighten components such as the fluid reservoir and hoses. 2. White smoke: In winter or under low-temperature conditions, a small amount of white smoke from the engine is normal. However, excessive white smoke may indicate coolant entering the engine due to a breach between the engine cylinders and the cooling system, evaporating into steam under high temperatures. This requires immediate attention, as it can cause severe engine damage. Seek professional repair or inspection at a 4S shop. 3. Blue smoke: Delayed maintenance, the use of substandard engine oil, or prolonged intervals between oil changes can lead to blue smoke. Additionally, wear in engine compartment ducts or the throttle body may cause excessive oil to burn during intake, resulting in blue smoke. Performing maintenance and replacing the oil can resolve this issue.