What are the causes of engine shaking and abnormal noise?
3 Answers
Engine is a key component of many machines. There are three main reasons for its shaking and abnormal noise: 1. Root cause: Engine mount damage. The mount bears continuous repeated impacts, making rubber prone to fatigue. The generated high heat will inevitably cause vibration-damping rubber to age over time, weakening its damping effect. Replacement is needed to prevent engine vibration from transmitting into the cabin during operation. 2. Damage to the soft rubber connection between engine and frame. Natural rubber lifespan is 5 years, while mount rubber is designed for 80,000-100,000 km. Both pure rubber and hydraulic mounts face aging/cracking issues requiring inspection and replacement. 3. Other causes: Issues like flywheel, cylinder misfire, or carbon buildup can also cause idle shaking.
Oh, I often encounter engine shaking with abnormal noises. As someone with frequent car repair experience, this is usually caused by ignition system failures, such as aging spark plugs or damaged ignition coils leading to uneven combustion. The fuel system is also a suspect—clogged fuel injectors or insufficient fuel pump pressure can cause unstable fuel supply and result in shaking. Mechanical component issues, like loose engine mounts, can cause abnormal noises accompanied by vibrations, while bearing wear or piston ring problems increase friction noise. Air system problems, such as a dirty or clogged air filter, can restrict airflow and increase the likelihood of shaking. Faulty sensors, like oxygen sensors, can cause the ECU to make incorrect adjustments. It's recommended to use an OBD scanner to read trouble codes and pinpoint the source of the problem for timely repairs to prevent further damage. Regularly checking the condition of engine oil and coolant can reduce risks and maintain engine stability.
Last time my car was shaking badly and making a screeching sound, it turned out the spark plugs were faulty and got them replaced immediately to fix the issue. This situation is often caused by simple factors: ignition system problems like coil failure causing misfires and shaking; insufficient fuel supply such as clogged injectors leading to uneven fuel delivery and noticeable abnormal noises. Loose engine mount bolts are a common source of vibration; belt slippage produces a zinging sound; low engine oil levels reduce lubrication and amplify noise. Mechanical component wear like a failing water pump bearing results in high-frequency noises. Don’t overlook routine maintenance—such as checking spark plugs and filters every 5,000 km to ensure they're clean and unobstructed. At the first sign of trouble, I pull over to inspect or contact a repair shop to avoid the risk of roadside breakdowns—safety comes first.
