What is the rattle of the engine valve?

Automobile valve noise is caused by the clearance between hydraulic valve tappet and cam or valve seat. In most cases, the clearance is caused by excessive wear of the hydraulic tappet, and the abnormal sound is caused by the rapid release of oil pressure in the tappet, so the owner needs to replace the hydraulic tappet.

If the throttle of the car makes abnormal noise due to carbon deposition, we need to go to the repair shop to clean the throttle. Carbon deposition will not only produce noise, but also cause car jitter, so it is best to deal with it early.

Precautions for cleaning the carbon deposit on the throttle:

1, it should be noted that the throttle valve does not need to be disassembled for cleaning, but the sealing part of the inlet steam must be cleaned, and the idling motor must be disassembled before cleaning. Nozzle borrowing and cleaning-free disassembly have their own advantages and disadvantages. Under normal circumstances, the maintenance station is recommended to avoid dismantling to prevent other unnecessary waste.

2. If there is too much sludge in the accelerator, it may cause poor engine acceleration and increase fuel consumption, which is a big trouble for the owner. If the throttle is dirty, the owner only needs to go to the 4S shop to clean it.

Refer to the above? Baidu encyclopedia-throttling