Changing oil suction caps without removing the head. How much are the oil caps?

Modern engines are very technological, and companies have made great progress in the development, but still in the design of power units remain parts and components that are still heavily worn out and require regular replacement. Oil-removable caps (or, as they are still called, valve seals) is one of the consumables for cars. However, to install new parts you have to work hard, because they are installed in a very inaccessible place of the motor. Replacing the oil-removable caps without removing the head will simplify the life of motorists.

Functions

The valve is a rather important part of the timing. The upper parts of the parts are in the area where the fog of oil constantly stands. The lower part of the valve is located in the place where a dense suspension of the smallest drops of fuel constantly stands. If the valve is exhaust, then it is in a rather aggressive environment of very hot combustion products.

For the normal operation of the timing, it is necessary that there is lubrication. However, it is highly undesirable for the oils to enter the cylinders. So, when the valve moves, the lubricant is removed with a so-called protective skirt. This is the oil-removal cap.

Car manufacturers recommend repairing these consumables with the cylinder head removed. But replacing the oil-removable caps without removing the head is also possible.

Principles of shaft seals

When the lubricant fluid enters the cylinder through the valve stem, oil is mixed with the mixture from air and fuel. After ignition of the fuel mixture, the oil also burns. As a result, on the top of the valve plate, as well as on the saddle, a deposit is formed.

This often leads to a deterioration in the characteristics of the element - it ceases to close. Oil deposit is also formed on the walls of the combustion chamber, on the plane of the piston and on the rings. All this then leads to poor performance and increased engine wear.

But that's not all. Oil, which got into the cylinder, dramatically worsens the efficiency of combustion of fuel.

How does the cap work?

In the modern version, this stuffing box is a rubber cap, inside of which is a bushing made of steel, as well as an expander spring. It reliably presses the edge of the part against the valve stem.

How to determine the effectiveness?

Efficiency can be determined by design, but the best quality is determined by the material of which the part is made. If the consumable material is made of acrylate rubber or fluororubber, then the efficiency will be at a height.

Sometimes it is possible to meet seals made of fluoroplastic, in which there is no reinforcement. They are inefficient, and the crimping is carried out thanks to a wide edge.

Caps that are installed on VAZ engines, and the same parts, but on top models of any foreign brands can have the same lifetime.

It is very important to know what particular seals are installed in the motor. After all, for such a service as replacing oil-removable caps, the price can be very high. At the SRT, before performing this operation, the power unit is disassembled almost completely.

Replacement involves the use of only original consumables for specific motors.

Why do oil caps wear out?

The crankshaft in engines can be rotated at a speed of up to 4500 rpm. In one minute, each of the valves can perform up to 1200 cycles. Naturally, the cap also works in a huge volume and experiences serious loads. This oil seal is also subjected to aggressive action of oils, as well as hot gases.

As a result, the material from which the stuffing box is made hardens. The working parts gradually wear out and wear away. These details are subject to replacement from time to time, but you do not need to think that they are changed like candles.

Modern automobile plants produce products whose service life is up to hundreds of kilometers. But there are motors where this replacement is much more often. For example, this is one of the reasons for the breakdown of VAZ cars. Repair is reduced to a simple replacement.

Symptoms of stem seal packing

Car enthusiasts who have a lot of driving experience know the basic signs of an early replacement. This candle on candles, increased appetite for oil, smoke from the exhaust pipe.

It is better to replace it with the first signs. But if this is done later, the deposit will accumulate, and the engine will lose power.

How can I find the right replacement parts?

To date, there are no problems with the purchase of any spare parts. Any oil removable caps are available. Their price is from 200 rubles. But it should not be ruled out that in car stores there may not be what the manufacturer recommends.

If we talk about the selection of oil seals, then for engines of more modern models, you can use new acrylate or fluorine rubber products. But they can also be used for VAZ cars. Repair will cost a little more, but the quality will be on top.

It is also important to take into account the internal profile when choosing a part. For example, Japanese-made units are equipped with caps with an internal protrusion. Do not experiment - these products on a smooth bushing simply will not stand up.

How much are the oil caps?

Today on sale there are different options for any cars. The most expensive can cost up to 1000 rubles. Caps for domestic engines can cost the car owner a mere penny.

We are replacing

You found in your car the standard signs of wear caps and you have to replace. You have a choice: either contact the service station and spend a good amount for the assembly and disassembly of cylinder head, or do all the work yourself.

And if in the workshop they disassemble the head, then self-replacement of oil-removable caps without removing the head - it's much cheaper and easier. Naturally, you need to have at least some experience of repairing a car.

Required Tools

To perform this operation, you must first collect a set of tools. It will require a standard kit for working with the engine. In addition, find pliers, as well as a special tool for compressing the valve spring. Also pick up the tweezers - with it you will get the biscuits. Another prepare the mandrel to press new oil seals. Naturally, a hammer and rod made of tin with a diameter of at least 8 cm will be useful.

Replacement of oil removal caps without removing the head by hand

As an example, take the car VAZ. Let's see how the oil change caps change.

First, remove the head cover. Further turn the crankshaft. Twist it until the marks on the sprocket wheel with the bearing mark match. Next, remove the bearing housing and camshaft. Now you can make a chain and an asterisk. Now disconnect the wires from the candles and unscrew the candles.

Well press the springs and remove the valve actuator lever. Turn out the adjusting screw, and in its place screw the tool for removal of springs. In the hole where there was a candle, insert a prepared tin rod. This is done in order to close the valve. It remains to release crackers with a special tool.

Now you can see the oil seals. To understand how many oil change caps to change, you must first assess their condition. But it is recommended to change everything at once. To replace, a collet is required. So, with the help of a few light strokes, you can remove the oil-removable caps. Do not use for the process of pressing out with various screwdrivers or other inappropriate tools.

Now you just have to put on a new part on the valve. Do this very carefully. The internal surface of the stuffing box can be lubricated. So the detail will go easier. For the final press-in, tap the body lightly.

As you can see, it's easy to perform such an operation as replacing the oil-removable caps. The price of such a service in the service station is sky-high, so you not only gain experience in car repair, but also save your money.