Oil-removable caps: signs of wear and replacement

Modern technology engines are poorly represented without a good lubrication system. But also it is necessary that the oil does not get into the cylinders.

What is a valve gland?

Oil-removable valve caps (or valve seals) are designed to prevent excess oil from escaping from the engine. Like most parts in the engine, they are made of special rubber. Time passes, these details age, which means they lose their effectiveness. This is characterized by stratification. Old oil seals do not hold oil excess well, and the lubricant consumption is significantly increased. In addition to the high flow rate of the lubricating fluid, this can severely damage the motor. Let's look at the signs of the failure of these parts, and also learn how to replace the oil-removal caps.

Why are they needed in the engine?

In the cylinder head there are valves that participate in the ICE. The upper part of the part, more precisely its leg, constantly comes into contact with the camshaft. When it rotates, a slurry of oil is created in the cylinder head. The other part of the valve is located in the zone where it is constantly in contact with the fuel mixture and exhaust gases. To ensure that the camshaft is reliable and uninterrupted, a large amount of lubrication is necessary. However, one should take into account that grease ingress into combustion chambers is unacceptable.

So the engineers came up with this detail. When the valve is in motion, the rubber seal removes oil from the stem, while not allowing it to enter the combustion chamber.

Where can I find the oil seals?

In the engine to find oil removable caps is easy and simple. They are located directly on the valve, if the engine is assembled. If the engine is dismantled, then you need to look for them in the cylinder head. The number of these details is not difficult to ascertain. They are the same as the valves.

How is the stuffing box arranged?

The modern epiploon is a cap made of rubber. For reliability, it is reinforced with a steel bushing and a spring. The spring allows you to tighten the edge of the cap more tightly to the working part of the valve.

The efficiency of the part is determined not by the design itself. The material from which the stuffing box is made is important. If the cap is made of acrylate rubber or recycled rubber, then we can talk about good compaction.

The engines of obsolete models are equipped with non-reinforced glands, which are made of PTFE - the efficiency was achieved due to the wider edge.

It should be understood that the wear of the oil-removable caps is completely independent of the level and class of the car, as well as those technologies that are used in their production. And for different models VAZ and Mercedes oil seals can have the same lifetime.

It is necessary to know exactly which caps are in the motor. After all, the replacement process is quite an expensive operation. This is primarily due to the fact that it is necessary to disassemble the engine. Also, automakers advise to install only original parts for a particular engine model.

Oil-removable caps - signs of wear

The crankshaft rotates at 500 rpm at idle speed while the engine is running, and at driving - up to 4500 rpm. For every minute the valves run from 150 to 1200 cycles. Naturally, the seals have a heavy load. In addition, the hood is still highly affected by the aggressive chemical environment. Here oil and hot exhaust gases are applied to the stuffing box material .

Because of such loads, the material from which the softest part is made becomes harder. Then, the work edges of the part are erased. In this case, the oil change caps must be replaced, the engine can also be rinsed or prevented.

However, one should not think that oil seals need to be changed every year. Modern manufacturers have already established a culture of production of these parts. Replacement is necessary once in 100 000 km. But there are motors where replacement needs to be done more often.

What are the old wear-off caps of signs of wear? Here they can be seen even externally. The wear can be recognized by the smoke from the smoke from the exhaust pipe. It can appear for a while only when the engine starts or when the motor brakes.

On such details, as маслосъемные caps, signs of deterioration in the form of a smoke - not a unique factor. The second sign - the raised "appetite" to oil. In this case, a leak of a lubricating fluid may not be observed at all. If to speak approximately, the expense will increase to 1 liter of oil on 1000 km. Also one more sign - salting and sizing of electrodes on candles.

How do I replace oil caps?

Many advise to carry out this operation in certified service stations, because the work requires disassembly of the motor. It is possible to carry out this operation and without removing the cylinder head, it is only necessary to reserve the necessary amount of patience.

Set of tools

Some tools will be needed to work. Usually a set of tools is required , which is used to repair the motor. We need a combination of pliers and a special tool that will compress the valve spring. Tweezers will be needed in order to get biscuits. In addition to all this, you need a mandrel, which will help you to press the stuffing box. Still need a hammer and a rod of tin solder. The dimensions of the bar must be no more than 8 cm in diameter.

We are replacing

Removing oil removable caps provides the following steps. First you need to remove the cylinder head cover. Then crank the crankshaft. It is necessary to rotate until the mark on the camshaft sprocket coincides with the same mark on the bearing housing. Next, we remove the bearing housing together with the camshaft. Now you can fix the star and chain. We disconnect wires from spark plugs and we turn out candles.

At the next stage, we press the spring well and remove the lever of the valve drive. We withdraw from under the locking plate and remove the spring. Turn out the adjusting screw. The screw must be screwed in with a tool that can compress the valve spring. In the hole that formed from the removal of the candle, insert our rod. This is required in order for the valve to remain closed. Now loosen the rusks. To do this, it is usually necessary to compress the valve spring and tighten the bolt of the rascal. Remove the parts, remove the tool.

Now you can see the oil seals. If you do not know how to change the oil-removal caps, then use a collet clamp. This allows you to remove the oil seals with the help of light strikes. It is not necessary to use for выпрессовки screwdrivers, pliers or any other similar tools. So you can open the bushing.

The new part should be carefully put on the valve (and at the same time try not to damage its extreme part). Inner surfaces must be oiled. So it will be possible to advance the stuffing box along the valve to the guide bushing. Now it remains to knock lightly and finally press the oil seal.

After successful pressing it is time to collect everything in reverse order. So you learned how to change the oil suction caps.

How to choose oil seals?

Today, there are practically no problems with spare parts. However, you do not need to exclude the situation when you have to trust not on the spare parts that the manufacturer recommended, but on what is in stores.

If to speak about a choice маслосъемных epiploons, their primary purpose - consolidation for cores of the valve, and also клапанных plugs. These seals must protect the combustion chambers from oil. When oil seals are visible, signs of wear, it's time to take care of purchasing new ones.

You know how these elements are arranged. As shown by the use of these parts, it is this solution that gives good results. Thus, the protection is maintained even when suddenly the valve stem is warped.

New models of fluorocarbon rubber or acrylic rubber caps are used on modern engines. However, no one anywhere said that they can not be used on older machines.

If the old engine is fitted with new oil-removable rings, signs of wear will appear much later than the time, and the motor itself will benefit greatly from this move. This is the optimal solution, if the cap comes to the valve according to the landing dimensions.

It is also important to take into account the profile of the inner part of the stuffing box. For example, Japanese engines have caps that have a protrusion inside. On the guide bushing in this place is a groove. It is not necessary to conduct experiments and put such details on smooth bushings.

A long resource for the caps will ensure the installation of new seals on new engines. If you can put new models of caps on an old motor and nothing will happen, then if you put an old packing model on a new ICE model, then anything can happen. Here, it's not even about what kind of oil-removal caps on the design features, but the fact that the new power plants operate in extremely hard modes. Old models of oil seals simply can not withstand such loads. Therefore, their purchase is meaningless.

So, we found out which signs of wear have oil-removable caps.