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Almost every owner of an old car of domestic or foreign production prefers to repair it on its own. Including the engine. In this regard, it is quite often necessary to make tickle in home-garage conditions. And many are asked a legitarily question that this procedure requires and how to correct the valve.

Some Matchasts

For those who do not know, it is worth explaining that the valves are in. For each cylinder there is a minimum of two valves (most cars). One valve provides the inlet of the fuel and air mixture to the cylinder (combustion chamber) from the intake manifold, and the other - releases exhaust gases to the exhaust manifold.

Of course, the valves open alternately. Like valves on a nail. The head, which is also called a plate, they are addressed inside the cylinder. In the closed state, the valve head is located in the saddle and hermetically closes the combustion chamber, pressing to the saddle of the work facility.

For what to pull the valves

In the process of work on the plates of valves, and the Nagar is formed on the saddles. It prevents hermetic closure and valve. For normal engine operation, this is very important. After all, after the fuel-air mixture was drawn into the combustion chamber on the intake tact, it squeezes it, rising into his upper dead point. Inlet and exhaust valves must be closed. The stronger it is, the more efficient and the engine will be saving. Of course, with a loose fit of the intake valve in the saddle of the maximum compression and effective combustion of the mixture, there will be no effect with all the consequences from here.

As for the loose fit of the exhaust valve, in this case not only the disruption of tightness will occur on the compression tact, but also a breakthrough of expanding gases from the combustion chamber after the ignition of the charge. The hot gases ignore the outlet valve, the engine loses power, as part of the gases does not push the piston, but flies into the release. Such consequences are the answer to the question that will be if the valves are not fit.

However, in order to correct the situation, there are no special difficulties. More time and forces have to spend on removing the head of the cylinder block and the valve themselves. In addition, the probability of lack of need to pull each of them is high.

How to determine that the valve must be hiped

Typically, the valves are squeezed after the engine overhaul. Or, for example, after. To not disassemble the second time. The need for the procedure is checked on the signed head of the cylinder block. It is installed on a flat surface of valve plates up. Then in the combustion chambers poured kerosene, and if it is not, then gasoline will come. Notice the level, after which the GBC is left in this position for twelve hours.

If the liquid has not gone during this time, then everything is in order. If it goes, it means that it remains to work. To determine which of the two valves in the cylinder skips, the presence of dampness in graduation or in the intake manifold is well helped. You can check in another way. The principle will be the same, and the difference is that liquid (gasoline or kerosene) is poured into collectors. The head is on the side. Naturally, they evaluate to flow from the plates.

In order to launch the valve to the head at home, drill will be required (preferably with reverse) and a special paste. For this procedure, the valve will have to be cleaned and removed. By the way, at the same time, it is possible to replace the oil-challenge caps, if there is a need.

  • Before work, it is recommended to degrease the valve and the saddle using the solvent. A small amount of triotherapy paste is evenly applied to the valve working champper. It is very important to ensure that it does not get to the valve stem, because the paste is the strongest abrasive (as a rule, diamond). If damage to the rod remains, the oil surcharges will be much faster failure and the oil consumption will increase significantly. For an obstacle to this, you can wear a piece of felt.

The valve is installed in its place, and the rod is fixed in the drill cartridge. Most often for convenience, this is done with a piece of hose (one end - on the rod, the other - in the cartridge). Some masters clamp a rod directly into the cartridge. The trigger is carried out by rotation on small revs. At the same time, the plate can be pressed to the saddle. For example, a thick rubber band. But in most cases, they cost without additional devices.

  • Pressing happens when the drill is trembed. Rotation must be done both clockwise and in the opposite direction. Usually everything about everything goes no more than two minutes. To understand that the process is over, you need to know what the fitted valve looks like. A characteristic matte strip of a couple of millimeters width is formed on his chakk. Exactly the same strip, by the way, will be on the chase of the saddle. Sometimes after the procedure described, the finish treatment is carried out. It does not differ from the grip process, except that instead of a trigger paste, the gay paste is used, diluted with engine oil. Before applying a cloth, it is necessary to carefully delete the previous trioche remedy.
  • Check the quality of the wipes are needed not only on the strip mentioned above, but also with the help of the same fill kerosene or gasoline into the combustion chamber or in collectors. Before assembling the cylinder head, all parts must be thoroughly rinsed with gasoline. After all, if in the process of work, the abrasive from the pasta came to other surfaces, then the consequences may be very sad - the diamond powder will cause the occurrence of defects.

You should also know in what cases the valve trigger may not work. In the case when there are essential flaws (sinks) or when the saddles are crookedly cropped (cropped), the valve will not turn out. The first faithful sign of this is a matte strip on the chamfer uneven or completely intermittent. Here the output is simple, although not quite pleasant - buying new details. Although, you can try and tweer them on the machine.

What a triwort paste to use

Our grandfathers made a wipe tool independently. They collected dust under essays with a diamond circle, after which it was mixed with oil. Today, thanks to the progress and development of trade, motorists have a decent choice in specialized stores. Therefore, newcomers have a lawsager question that the valve lies, what paste. This is not about the price. Here everyone chooses at its discretion and in accordance with the possibilities. It is much more important to determine the graininess and composition.

High-grained pastes in an inexperienced motorist should not use. An error in work can lead to the emergence of significant defects of non-flares of valve and saddle, which will entail additional costs. For this reason, it is better to use medium-trimmed pastes for basic work and fine-grained for grinding.

Very often in the kit there are already two tubes, which makes it easier for the buyer. In stores, the "Fabo" paste is often found in the stylized (in the shape of the valve) packaging. By the way, the name is an abbreviation and deciphered as finishing antifriction bassabosivic processing. This paste must be used as an finishing, after the valve is located with the help of a "classic" or "diamond" paste sold in the same package.

In addition to the above-mentioned paste on sale there is ABRO Grinding Paste GP-201 tool. In this case, two options will be at once in one package: coarse and fine-grained. It is much cheaper than Fabo. In addition, this paste is also suitable for removing rust from any metal surface, as well as for editing cutting tools. In short, such a multifunctional paste. Average and fine-grained paste in one pack can be obtained by purchasing Done Deal. The basis here is a silicon carbide powder. Also the universal means is useful in the farm. And if there is a chance and need to work with chrome surfaces, it is worth paying attention to PERMATEX paste. In any case, before buying it is recommended to carefully examine the instructions and then make a choice.

Now let's answer the question of what to do when there are no pasta. Sometimes there are such situations when you need to lift the valve if there is no paste. Well, in this case you have to remember the grandfathers, which has already been mentioned above or a little diversify them. So, if there is no dust from a diamond circle, then you will need the smallest sandpaper. From it you need to remove the abrasive and mix it with engine oil or solidol. As an finishing paste, the goe paste is used, mixed with the same lubricants. Of course, the quality of processing with such means will be much lower. Especially when there is no appropriate experience.

Let's summarize

So, as can be seen from all over the foregoing, the trigger is the procedure responsible, time-consuming, but the engine is extremely necessary for good work not only after repair, but also after the run over 60,000 kilometers. Only the question remained unclear: it is necessary to pull the valve on the new head.

As for such a case, there are two options: if the head is completely new and has been purchased fully equipped, then you can not hide. In any case, experts say what to do it is not necessary. However, if the head was purchased separately from the valves, the trigger will be needed. Again, in any case, before it is installed, the tightness of the fit of the plates can always be checked by a known manner, that is, with the help of flooding gasoline or kerosene into the GBC or collectors.

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