What if the valve of Volkswagen polo 09 rings?

The valve sound of Volkswagen polo 09 is caused by dirty throttle or faulty throttle sensor. The valve is noisy. Let's see if it is loose. If so, the belt tensioner is broken. If the belt is not loose, the valve tappet may be broken. If it is broken, just change it, and it will be fine. Also, has the oil gone bad and solidified like butter? If so, just change the oil.

Abnormal noise of brake and engine

As soon as you step on the brakes, there will be a squeak, indicating that the brake pads have worn to the limit and have begun to grind the brake discs. Find out the cause of the abnormal noise as soon as possible, and don't drive by force. At ordinary times, we should also get into the habit of checking the brake pads regularly to see if the brake pads of the four wheels have normal and abnormal wear. Engine abnormal sound inspection, hard branch, etc. Sometimes the vehicle squeaks due to the blockage of foreign objects, so be sure to check it carefully and get into the habit of checking the engine compartment frequently.