What Causes Engine Abnormal Noise When Engine Oil is Burned Out?
2 Answers
There are many reasons for abnormal engine noise when the engine oil is burned out, including excessively high oil viscosity, improper timing belt tension, incomplete gasoline combustion, exhaust system failure, and cooling system issues. If abnormal engine noise occurs, timely inspection and measures should be taken. Below is a detailed introduction to the causes of abnormal engine noise: 1. Unsuitable Engine Oil: Excessively high oil viscosity can lead to insufficient engine lubrication, causing friction. It is recommended that car owners choose the appropriate engine oil for their vehicles during maintenance to avoid this situation. 2. Timing Belt Abnormal Noise: Insufficient timing belt tension can cause the belt to stretch excessively under prolonged heavy load, resulting in abnormal noise. It is necessary to visit a repair shop to adjust the timing belt tension or replace it if the issue is severe. 3. Incomplete Gasoline Combustion: When poor-quality fuel is added to the car, the engine may not function properly. In such cases, it is necessary to refuel with high-quality gasoline.
My old car had this exact issue - the oil burned out and I heard terrifying rattling from the engine. The root cause was insufficient lubrication for internal components like the crankshaft and piston rings, causing dry friction, overheating, and abnormal noises. Prolonged operation could permanently damage or even total the engine. That time I ignored the oil warning light and ended up spending a fortune replacing bearing shells. Since then, I've made it a habit to check dipstick oil levels monthly instead of waiting for complete burn-off. My advice: stick to scheduled maintenance with qualified oil, stay alert for unusual engine sounds as early warnings, and address issues promptly for worry-free driving safety.
