An abnormal engine noise indicates that the technical condition of a certain engine mechanism has changed. Certain abnormal noises can predict the possibility of accidental engine damage. Therefore, problems should be discovered as early as possible to determine the cause. The main reasons for abnormal engine noise are: 1. The causes of hysterical engine noise problems can be divided into air filter, spark plug, ignition wire, gasoline, fuel filter, carburetor, pump oil and other problems. Check if the air filter is dirty, if the spark plug is old and needs to be replaced, if the ignition coil is broken, and if the gasoline is not clean, such as water in the fuel line. 'oil. Also check the oil pump, carburetor, etc. 2. When driving, acceleration is normal and ignition can be normal. However, if you drive at a constant speed, you will notice that the regime motor is too high but speed still seems unable to increase. Try checking the coolant. Oil pressure is too high or too low. Check the pressure gauge. There may be a problem with the ignition time setting, which may also cause such symptoms. As with others, it could be a problem internal to the engine, such as a clogged EGR valve. 3. The motor makes a whistling sound. This may be a problem. The engine is overheating. Check the cooling system. The exhaust system is clogged, the suction pipe is leaking or broken. 4. When accelerating, the motor will make a whirring sound, or it will also sound when decelerating. In short, the sound will change as the regime changes. The possible reason is lack of power steering oil, fill it up. The generator bearings could be damaged. Problems with the power steering pump and pumpwater will produce similar noises. 5. A loud noise comes from the exhaust pipe. The main problem lies in the exhaust system. Check if the exhaust pipe is broken. 7. When you press the accelerator pedal, you will hear a clicking sound coming from the exhaust pipe. The sound may not be very loud, the car will not run abnormally, and fuel consumption will increase. It is recommended to check the muffler and exhaust pipe for damage. 8. The possible cause of the engine kicking noise is dirt inside the engine. It is recommended to change the oil, filter and clean the engine. Others may be a valve problem. 9. There may be no problem while driving, but there will be a clicking noise when accelerating. It is recommended to check the ignition time setting. The engine may be overheating, the enginer may have carbon deposits or the oil quality may be poor. . A higher quality oil may be necessary. 10. High-pitched, squeal-like noises are especially noticeable when the air conditioner is running, the weather is cooler, and it is slowing down. Possible reasons are that the drive belt is slipping and the driving direction is too high, reaching the limit. The belt is too loose, tightening the belt may solve the problem. 11. When driving at low speed or accelerating with the gas pedal, you will hear a ringing-like noise under the engine, especially when the weather is cooler.
Check if it is the noise of the cylinder block. Otherwise, it can be determined that it is related to the car's starting system.
When checking, check if the belt is broken or has burrs; pay attention to whetherthe position of the starter is deviated, or if the belt connecting the starter is aging or twisting.
Timely inspection and maintenance, as well as minor car problems should not be ignored.
Detailed information:
Car maintenance knowledge:
It is best to use antifreeze all year round. In addition to antifreeze and cooling functions, antifreeze also has cleaning, rust removal and anticorrosion functions, thereby reducing corrosion of the water tank and protecting the engine. Be careful to choose the right color of antifreeze and not to mix them.
The function of the brake system is closely related to brake oil. When inspecting and replacing brake pads, pads and other hardware, remember to see if you need to add and replace brake fluid.
AfTo ensure that the car runs smoothly, check the transmission oil frequently, whether it is gear oil or automatic transmission oil. Pay attention to the type of oil, which is usually high.
Reference materials:
Baidu Encyclopedia-Car Fault Diagnosis