What is the reason for the loud noise of automobile engine?

What is the cause of engine noise and how to solve it? It's normal to drive at ordinary times, and suddenly the engine is loud. What happened? Now, let's talk about the causes of loud engine noise and how to solve it.

1. When stepping on the accelerator, I found that the acceleration was not obvious, the power was insufficient, and the engine was hysterical. The most likely time is when the engine is hot, cold or short of oil. The causes of such problems can be divided into air filter, spark plug, ignition wire, gasoline, gasoline filter, gasifier, oil pump and other problems. Check whether the empty filter element is dirty, whether the spark plug needs to be replaced, whether the ignition coil is broken and whether the gasoline is clean, such as water in the oil circuit. Check the oil pump.

2. When driving, the acceleration is normal, and the ignition may be normal. However, if driving at a constant speed, it is found that the engine speed is too high, but the speed is still not raised. Check whether the pressure of coolant and oil is too high or too low, and check the oil pressure gauge. There may be a problem with the ignition time setting, which may also cause such symptoms. As for the others, it may be an internal problem of the engine, such as EGR valve blockage.

3. The engine hisses, just like steam or/and after hearing this sound, the engine will soon lose power. Maybe the engine is overheating. Check the cooling system. The exhaust system is blocked, and the vacuum tube leaks or breaks.

4. The engine will whir when accelerating or appear when decelerating. In short, with the change of speed, the volume will also change. It may be that the power steering oil is insufficient and filled with oil. The generator may be damaged. Problems with the power steering pump and the water pump will both produce similar noises.

The exhaust pipe makes a lot of noise, which is annoying. Sometimes a similar sound will come from the front part. The main problem is the exhaust system. Check whether the exhaust pipe is broken.

6. When the engine changes speed, it will make a clicking sound, as if something is beating the metal. It may not be heard when accelerating, which may be due to the cylinder valve. You can change the regulating valve. Lack of oil may cause similar problems, and the oil pressure is relatively low, so check the oil pressure.

7. When you step on the accelerator pedal, you will hear the exhaust pipe bang. The sound may not be loud, the car will not make abnormal noise when driving, and the fuel consumption will increase. It is recommended to check whether the muffler and exhaust pipe are damaged.

8. The engine has the sound of kicking, like the sound of a pencil hitting a table. When the engine speed increases, the sound will increase. Possible cause: There is dust inside the engine. It is recommended to change the oil, filter and clean the engine. There may be a valve problem.

9. There may be no problem driving, and there will be a click when accelerating. It is recommended to check the ignition time setting. The engine may overheat, the engine may accumulate carbon, and the engine oil is not good, so it is necessary to add advanced engine oil.

10, sharp noise, similar to squeak. . . . . . . Cheap. . . . . Wait a minute. It really annoys me to hear it from a distance, especially when it's on. Cooler, more obvious when slowing down. It may be that the drive belt slipped and hit the direction too hard, reaching the limit. The belt is too loose, which can be solved by tightening the leather belt.

1 1. When driving at a low speed or refueling, there will be the same sound under the engine as kroenke, especially in cold weather. It is recommended to lift the frame and check whether there is a heat shield between the exhaust pipe and the ground. It may be caused by the aging of the heat insulation board, which can be solved by replacing or disassembling it.

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