The valve sounds abnormally. The "click-click" sound of the engine after driving is the noise of the valve, especially after starting the car when it is cold, because the oil pressure has not yet increased and the valve has not not yet been lubricated. Everything will be fine. after a while.
There are many reasons for abnormal engine noise, such as abnormal noise coming from the engine belt. This is a "grinding" noise, such as the generator belt, air conditioning belt, power steering pump belt, etc. The belt may be too loose or too tight, or it may be aging. This problem can be resolved by adjusting the belt tightness, applying butter to the belt, or replacing the belt.
If the engine runs out of cylinders and one cylinder does not work, the engine will lose balance and produce abnormal noise, accompanied by strong vibration.engine failure, insufficient power and other faults. The ignition module, spark plug or injector may be defective. You just need to replace the corresponding accessories.
If the sound continues to ring, the valve clearance may be too high or the camshaft may be leaking oil. The valve clearances must be adjusted or the affected oil seal must be replaced.
It is also possible that the engine oil used is not qualified. For example, high-mileage vehicles use relatively thin engine oil, which can be removed by changing the engine oil.
Due; In direct injection diesel engines, a large amount of explosive forces create a shock wave and push it towards the piston. This force is much greater than that of an EFI engine. Therefore, the sound of the shock wave hitting the piston will be louder. If you listen to it from outside, you will hear the soundunique to a diesel engine.
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Why is there a high-pitched squealing sound when the car starts?
After starting the car, there is an abnormal noise in the hood, which is similar to the squeak of metal friction. This is the abnormal noise of the generator belt after a period of operation. operation, it will disappear. In this case, replace it with a new one. The generator belt may solve the problem. The specific steps are as follows:
1.
2. Loosen the tension wheel.
3. Remove the generator belt.
4. Install the new generator belt.
5. Tighten the tensioner screw and you're done.
Why is there an abnormal noise in the car engine?
If the vehicle makes an abnormal noise when starting from cold, the carbon brush inside the starter motor may be defective.
The working principle of the starter is that after the electromagnet is energized, the electromagnet works to combine the starter gear with the motor flywheel and rotate at the same time . The engine can be started. Once the engine starts, the speed will return quickly. This fault is caused by the starter gear not returning quickly, causing abnormal noise caused by the flywheel gear, so the starter motor should be checked.
Insufficient engine cylinders.
When the engine runs out of cylinders, problems such as loud engine noise, unstable idling speed and abnormal body vibration will occur. In this case, check the condition of the cylinder and the working condition of the spark plug. When the engine is running, the piston skirt collides with the cylinder wall, producing a sharp "dang-dang" sound. This is usually most noticeable at idle or low speeds.e.