How many days does it take to replace the intake valve in Mercedes-Benz 4s shop?

It takes 20,000-30,000 kilometers to clean the intake valve in a Mercedes-Benz 4s shop. Unless the throttle valve is faulty, it must be replaced if it is determined that the fault is permanent. Generally, the throttle cannot be disassembled for maintenance, only the assembly can be replaced. The main cause of throttle scaling is oil vapor, followed by particles and moisture in the air, that is, when using qualified air filters and removing crankcase ventilation pipes.

Function of intake valve

The reason why the crankcase ventilation pipe is connected to the throttle valve is the requirement of environmental protection on the one hand, and the gas is pumped out of the crankcase by using the negative pressure of intake air on the other hand. When the oily steam reaches the intake pipe and becomes cold, the oil in it will condense on the intake and throttle valve, and then the carbon deposit in the steam will also be deposited on these parts, because the gap opened by the throttle valve has the largest air flow, small space and low gas temperature.

Air temperature, engine working temperature, driving habits and many other aspects, even for individuals, can not use a fixed number of kilometers to determine the time to clean the throttle. The interval between the first throttle cleaning of a new car is the longest. Because of the continuous condensation of oil and gas in the crankcase ventilation pipe and air inlet, the cleaning frequency will increase, and different weather conditions will also affect the speed of throttle scaling.