What are the two air pipes on the valve cover of an automobile?

The rubber hose on the valve cover is mainly used to remove oil waste gas. Because the valve chamber is connected with the crankcase below, some pressure will penetrate into the crankcase when the engine does work, and the crankcase will also produce oil waste gas, so it will be discharged through the pipeline. These gases will enter the intake pipe and burn again with the engine to reduce pollution.

The function of door cavity pad is mainly to prevent oil from leaking out when it is dense. Sealed energy is mostly rubber village. Due to the long service life of the vehicle, the rubber village is aging and difficult to check, resulting in oil leakage. Because the valve chamber is located in the upper part of the engine, the valve chamber gasket will flow down along the cylinder head after the amount of oil is finished. Because the engine works at high temperature, the engine oil attached to the engine surface will be removed, resulting in nose-building smoke.

Extended data:

Precautions:

1, the valve guide plays a guiding role in the movement of the valve stem, prevents the valve head from being skewed, and makes the valve and the valve seat fit closely. The inner surface of the valve guide requires high dimensional accuracy. The valve guide tube is directly pressed in the cylinder head, which plays a guiding role and ensures the linear motion of the valve.

2. The outer diameter of the conduit should have a certain tightness with the conduit mounting hole on the cylinder head. When installing, press the guide tube into the installation hole on the cylinder head by hand. If hammering is used, the upper end of the conduit should be padded with wooden boards to prevent the conduit from being deformed or damaged.

3. If there is no limit setting on the outer circle of the guide tube, pay attention to the press-in depth, that is, the upper end of the valve guide tube should be higher than the cylinder head by a certain height. The length of the exposed part of the old conduit can be measured first, and the same length can be left after installing the new conduit to ensure sufficient distance for valve opening and closing activities.

Baidu encyclopedia-valve room

Baidu encyclopedia-valve clearance