What Causes Engine Oil Leakage in a Car?

[DiDaniel]

Reasons for engine oil leakage in a car: 1. Drain plug leakage, where oil seeps externally, lubricant leaks at the engine sump drain bolt, or the sealing performance of the engine sump gasket fails, causing lubricant leakage; 2. Incorrect oil level or inaccurate dipstick reading; 3. Blockage or component failure in the crankcase ventilation system, such as turbocharger failure. Solutions for engine oil leakage: 1. Replace aging gaskets, including the oil pan gasket, valve cover gasket, front and rear crankshaft oil seals, camshaft oil seals, etc.; 2. When adding oil at the oil filler port, be careful and steady each time to avoid overflow and dripping; 3. When tightening the drain bolt after an oil change, avoid excessive force, especially with aluminum oil pans, as this can lead to poor sealing and oil leakage after a few instances; 4. If the oil filter housing seal is not tight and leaks oil, replace the sealing gasket.