Valve sealing

Valve sealing

Valve sealing

Sealing valves is one of the things that must be done for their better performance. To seal the valves, you must act as follows:

1. First, you need to change the angle between the valve cone and the seat. Because between the cone part of the valve and the seat part, there is nothing else that can seal the valve accurately. The angle between these parts should be 44 degrees or 29 degrees. (The 44 degree angle provides better sealing and low volumetric efficiency, but the 29 degree angle provides poorer sealing and higher volumetric efficiency) After changing the contact angle, the conical section of the valve changes from surface to line mode. 

2. Now make sure that there is no leakage between the conical part of the valve and its seat. To do this, just pour some oil behind the valves and wait. If you notice a leak in the cylinder head, you should first seal it with coarse sanding oil and then with soft sanding oil. (To do this better, it is better to use a little talcum powder or its separation powder. These powders are used in casting, and by pouring them on the bottom of the cylinder head, you can easily find out if there is a leak or not)

3. Now open the valve spring and pour a small amount of sanding oil between the conical part of the valve and the valve seat.

4. At this stage, you should turn the valve to the right round and left round positions, consecutively.

5. Pour sanding oil again and repeat the operation.

6. Finally, repeat the valve leakage test again to make sure the sealing is done. If you have a question about valve sealing, you can ask your question through the comments section. Also share your comments and suggestions with us.

Car valve

A valve is a part of a car engine, which is a French word that means valve. Valves in the car are responsible for controlling the entry and exit of air and smoke. This piece looks like a mushroom and is placed on the cylinder head. In the figure below, you can see some valves.

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آب بندی سوپاپ

How the valves work
The process of generating power for the movement of the car is that oxygen is taken from the air outside the car, fuel is burned inside the cylinder, and finally the production energy and smoke are obtained from it, and the resulting smoke must be somehow removed from the car. to be The valves are closed during this operation to cut off the communication with the outside completely. There are different types of valves that are divided into two general categories: 1. Air valve

2. Smoke valve

As it is clear from the name of each of the valves, the air valve is used for air entry (so-called breathing) and the smoke valve is used for smoke exit. The smoke valve has a higher temperature than the air valve. Components of valves To better understand the function of valves, get to know more about its components. Valves consist of different components as follows:

1. The diameter of the skull

2. Gauge line diameter

3. Lameness around the clavicle

4. Floor lameness

5. Full load

6. Leg roughness

7. Overall height

8. Leg plating height

9. Leg diameter

10. Hard work height

11. Belt height

12. The height of the end chamfer

13. Stiffness at the end of the leg

14. Lameness at the end of the leg

In the picture below, you can see the position of these components:

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اجزای سوپاپ



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