What Causes Loud Engine Noise After Vehicle Maintenance?
1 Answers
Here are the reasons for loud engine noise after vehicle maintenance: 1. Using engine oil of different brands or specifications. 2. Excessive carbon buildup or overfilling of engine oil. 3. Incomplete removal of the original engine oil. 4. Changing the type of engine oil may cause noise. Here are solutions to reduce loud engine noise: 1. Use specialized equipment to perform a no-disassembly cleaning of the engine lubrication system. 2. Replace with the appropriate or higher-grade engine oil suitable for the vehicle model. 3. Add an appropriate amount of anti-wear additive for wear resistance and repair. 4. It is recommended to lift the vehicle and check if there is a heat shield between the exhaust pipe and the ground. The noise may be caused by aging of the heat shield, which can be resolved by replacement or removal.