What is the reason for the crisp sound when you hit the iron plate while driving? How to solve it?

When idling, vehicles are generally quiet, but recently some car owners have discovered this. After their engine started at idle speed, it was not normal for them to hit the iron plate while driving. We need to find the reason first and then solve the problem. We can go to a professional repair shop for repair. Don't be careless.

The causes and solutions of automobile clanging;

1, the crisp sound of striking the iron is often related to the working cycle of the engine, especially the abnormal sound of the crank-connecting rod mechanism and the valve mechanism. Usually, the noise caused by the gap unrelated to the working cycle is the fault of engine parts; If the components irrelevant to the working cycle make a continuous metal rubbing sound, it can be considered that some rotating components are faulty. Because a small amount of waste gas in the tank will be discharged into the combustion chamber for combustion, it will pass through the electromagnetic valve part of the carbon tank in the process, producing a clicking sound. If the parts are aged or damaged, they can be replaced.

2. The pressure is too low, because when idling, the engine oil can not be well lubricated to the top of the engine valve and valve cylinder for the time being, resulting in insufficient valve lubrication and a clicking sound. At this point, the engine will eliminate the sound after full lubrication; When the oil pump is excessively worn, the clearance is too large, which affects the oil pressure of the oil pump and causes the oil pressure to be low. We can change the oil pump. Low oil pressure will cause hidden dangers such as poor lubrication and abnormal wear of internal parts of the engine. Once the oil pressure gives an alarm, stop the engine as soon as possible, call the rescue number and wait for the rescue, so as not to cause more losses.

3. You can try to cut off the fire with one cylinder. The sound weakens or disappears after the fire is cut off, and then resumes after the sound is restored. The sound disappears or weakens after the hot car, which can prove that the piston knocks on the cylinder. At this time, we can't solve the problem. We can go to a professional repair shop or a 4S shop for processing.

When the engine starts, the idle speed is generally within 1300 rpm. When the engine is started gradually, the idle speed will slowly decrease, so we don't need much time to warm up the car, just wait for the idle speed to stabilize.