Spark plug wells. What to do if oil gets into candle wells. How to replace this part

The cars of the VAZ family have many features in terms of maintenance, and one of them is the ingress of oil into the candle wells. The reasons for this phenomenon can be different, in many respects it all depends on the specific model and type of engine. Today we will look at what threatens the oil leak in the spark plug wells of the internal combustion engine and how to solve this problem with our own hands.

Causes of breakdown and solutions to the problem

Such a nuisance happens quite often. Let's figure out why. Oil in the spark plug wells appears due to the wear of the gaskets. In general, this malfunction is not so dangerous, at least not as much as, for example, getting the same lubricant on the cylinder head. Perhaps the most serious consequence of this problem is the softening of the rubber insulator of high voltage wires, which in turn will cause breakdown. But this does not mean at all that you can let things go by themselves. Notice that oil is getting into the candle well? Change the well gaskets immediately and the problem will be solved. Otherwise, you will have to change the candles very often (usually, their resource decreases several times).

How to make a repair?

We have already found out why oil is formed in the candle wells, now let's talk about how to replace the gaskets. First, we need to prepare all the parts and materials. In the course of performing work to eliminate the leak, you will need:

Two valve cover gaskets.
10 sealing washers.
Grease WD 40 and
4 oil seals for candle wells.
Engine cleaner.

Having prepared everything you need, you can safely get to work. In general, the process of replacing well gaskets can be divided into several stages:

Removing the valve cover.
Dismantling of wells.
Removing old O-rings and installing new ones.
Reassembly.

More detailed instructions

Below we will take a closer look at how to eliminate oil in the candle wells of the 2112th VAZ and other models of cars of the Volga Automobile Plant.

So where do you get started? First, remove the plastic engine cover and the receiver. All openings in the intake manifold are closed with covers (we need this in order to prevent the penetration of foreign objects into the part). Next, the ignition module is dismantled, as well as the crankcase ventilation hose from the cylinder block cover branch pipe. Then, using a 10 key, unscrew the bolt of the injector harness connector bracket. With a spanner wrench for 8, 15 fastening screws are unscrewed on the cylinder block cover (it is also called the valve). After that, the block cover itself is removed from the machine.

Checking the hydraulic pusher

Next, you need to check the hydraulic pusher. How to do it? Everything is very simple - using a soft metal drift (or a simple screwdriver), just press on it and trace its further state. Ideally, the hydraulic pusher should be pressed down with great force.

But if for this you applied a minimum of force, then most likely this device needs to be replaced. By the way, when diagnosing a hydraulic pusher, the camshaft cam must be directed towards the first back side.

How to replace this part?

Since we cannot neglect the replacement of the hydraulic pusher in the course of solving our problem, we will devote a few words to the replacement of this device.

The first step is to remove the camshaft and wire from the oil pressure lamp sensor. Then, using a spanner wrench for 8, unscrew 20 fastening bolts of the bearing housing of this shaft.

The bolt connecting the rod to the engine rear mount bracket must also be removed. Then, at the same place, 3 nuts are removed using a 15 wrench. After that, the rear support bracket will not be securely fixed, and it can be safely removed (like the camshaft bearing housing). The spark plug guide pipes are removed from the latter. Further, the camshafts are removed from the housing. Don't forget about the oil seals.

In the next step, the 2 rear plugs of the cylinder block and the camshaft bearing housings are dismantled. To remove the hydraulic pusher, a magnet is applied to its end part, and the part is successfully removed from the head socket.

Before assembly, the cylinder head is thoroughly cleaned of dirt, and the camshaft bearing housing is thoroughly cleaned of oil and old sealants. Next, the cams of the shafts and bearing journals are lubricated with new engine oil.

On the surface which is mated with the cylinder head, a special substance (sealant) "Loctite No. 574" is applied with a 2-mm flagellum. Then the body is put back in place.

Now you need to lubricate the O-rings and install the guide pipes in the holes in the cylinder head and bearing housing. After that, new ones are pressed in and plugs are installed on the back of the block.

Before installing the cylinder head cover, it is necessary to apply a sealant to its surface (the same "Loctite", which removes oil in the spark plug wells). "Priora VAZ", however, can be repaired in another way. How exactly - read further in the article.

What to do if oil has formed in the candle wells? Eliminating the problem in an alternative way

Consider a faster method of fixing the problem, which will occur without dismantling the receiver and valve cover. However, here we need a special tool. And this is where many motorists have difficulties. The fact is that this tool (we are talking about a plug-well seal ring remover) is very difficult to find in stores, so often drivers have to make it with their own hands.

How to make a puller?

Everything is very simple and cheap. To assemble this tool, you need to have a metal pin with a length of at least 15 centimeters, a piece of rubber hose with a diameter of 20-25 millimeters, several washers, nuts and one bushing. What to do with all this? First, a washer is put on a long hairpin, then an elastic band, a sleeve and nuts. That's it - the spark plug well o-ring puller has been successfully manufactured! The cost price of such a tool is no more than 100 rubles, and it can be made in almost a few minutes. This will remove the oil in the candle wells very quickly. "Priora" and many other models of domestic cars are repaired using this tool.

Make sure that the elastic is clamped on both sides with washers. In this case, the diameter of the latter should be as close as possible to the width of the candle well itself. Otherwise, the clamped elastic will crawl out into the gap between the well and the washer, and we don't need this.

The pull handle is made from a valve nut. The lower washer should rest against the tip of the hairpin, and the upper one should be compressed by the bushing.

So, let's get down to repairs. First, the puller is inserted into the candle well, after which the lower nut is tightened until the moment when the axial movement of the tool will enable us to pull out the well. After a little effort, the glass will be successfully removed.

During the work, make sure that the rubber part of the inserted puller does not protrude in height beyond the well. Similarly to the first case, we install new oil seals, lubricate with oil and assemble in the reverse order. By the way, the installation process will take you less time than dismantling.

Nuances when performing work

If you decide to resort to the second option, do not forget about the rules of operation and work with this puller, otherwise you will not be able to remove oil in the candle wells. What, in fact, are we talking about? Explaining.

First, the rubber band of the tool must be immersed in the candle well in full size. Otherwise, it will gradually expand, and you will not be able to remove the glass.

Secondly, when removing the well, there is a possibility of displacement of the valve cover, which can subsequently block the key exit. But since the thickness of the glass wall is too small, using a long thin screwdriver, the mentioned part can be easily removed.

Thirdly, when pulling out the spark plug wrench, you need to make sure that the old lower oil seal does not jump out of place.

Summing up

In the first case, we spent about 4 hours of time and about one and a half thousand rubles to complete all the necessary work. Using the second method, you will spend no more than 1.5 hours on repairs, since the need to remove and reinstall the receiver and valve cover will be eliminated.

So, we found out why oil is formed in candle wells and how to fix this problem with our own hands. Don't break!

Most likely, most drivers, both experienced and novice, are unlikely to think about what the danger of oil getting into the candle wells is. And completely in vain. The reasons for this phenomenon can be various factors. To a large extent, they depend on both the engine model and its type.

In any case, the prudent owner will most likely prefer not to rush headlong to the nearest service station, but to try to solve the problem on his own. So let's dwell on this in more detail.

What is the risk of oil getting into candle wells? Such a nuisance can happen quite often, especially on domestically produced cars with decent mileage. Let's analyze how to fix the problem using the example of Lada Priora, a domestic-made VAZ car, not without some drawbacks.

Possible consequences

The main reason for the appearance of oil in the wells of the candles is the wear of the gaskets. And what could be its consequences for the health of your car? In fact, to be honest, such a flaw in operation cannot lead to anything especially military, according to experienced repairmen. That is, you can travel with such a problem, but not too long. This is not for you to get the same specified grease on the cylinder head (cylinder head).

One of the possible consequences is the case when the rubber insulator of the wires (high-voltage) softens, which can also cause a breakdown of the electrical circuit. However, the fact that the breakdown is insignificant should not mean letting it drift (many people like to drive until everything closes and starts to fall off). And if you notice that there is grease in the candle well, the gaskets of this unit need to be changed as soon as possible. This will fix the problem and resolve the issue.

Still noticed by the masters, that in this situation it is necessary to change the candles themselves quite often. Their resource is significantly reduced (several times, according to experience). And if you do not want to twist and install new ones with enviable constancy, then you definitely need to do the appropriate repair work.

Repair

How to work out the change of these parts correctly? First, for a successful procedure, you need to prepare the appropriate parts and tools. We will need: a pair of valve cover gaskets, 10 seals, a cleaner for the engine, 4 oil seals for wells. Having collected the above, you can proceed. It is better to carry out the process in a closed, heated and lighted room, in extreme cases - in a place closed from wind and dust (because dust can get into unprotected parts of the unit, creating additional problems).

We carry out the work in several stages:

We remove the valve cover, also the receiver. We close all possible openings in the collector so that unnecessary parts, objects and dust do not get into the unit itself;
Unmount the ignition, hose;
Unscrew the bracket bolt on the nozzle (key 10). Then - screws on the block cover (15 pieces). Remove the cover;
Next, you can check the hydraulic pusher. It is done quite simply: with a screwdriver. You need to press (it should press down with good effort). Otherwise, the mechanism is changed. With such a diagnosis with your own hands, carefully make sure that the camshaft cam is directed with the back side;
After that, it is necessary to dismantle the candle wells. This procedure is done using an appropriate puller. It must be inserted into the well of the candle, the nut is tightened and the mechanism is quite easily dismantled;
Next, we remove the old O-rings and install new ones in their place;
Putting it all in reverse order. Remember that before assembly the head must be thoroughly cleaned of dirt and the bearing housing must be free of old sealant and oil. The cams of the shafts must be lubricated with fresh grease. Before mounting the body, we apply sealant to the places where it was before dismantling.

The cavity for screwing in the spark plug must not contain any technical fluids. If you find oil in the candle wells, we recommend that you eliminate the cause of this malfunction as soon as possible. Consider why this phenomenon is dangerous, as well as the procedure for sealing joints with a sealant, replacing oil seals, sealing rings using the example of VAZ and Toyota engines.

The main reason

Oil enters the candle wells through the leakage of the joint of the elements separating the well from the inner space of the cylinder head. There are several options for the design of the block head.

Crankcase ventilation system

The increased pressure of crankcase gases is one of the main reasons for the accelerated breakthrough of oil through the seals of the spark plug holes. The closed-loop type assumes the supply of a mixture of vapors of oil, gasoline and exhaust gases back to the intake manifold.

The PCV valve is responsible for dispensing a portion of gases. If, for some reason, the valve does not cope with its task, overpressure will form inside the cylinder head. The cause of the malfunction can be both in the valve itself and in a worn-out cylinder-piston group. With worn compression rings, increased clearance between pistons and cylinders, the crankcase ventilation system is more difficult to cope with its task.

In case of heavy fogging around the valve cover gasket, pan, spark plug wells, we strongly recommend checking the crankcase ventilation. At elevated exhaust gas pressures, replacing the gaskets with an anaerobic sealant will only have a short-term effect.

Symptoms and Effects

To determine the malfunction, it is enough to pull out the tips of the GDP / ignition modules from the wells and unscrew the candles. The oil film on the elements will be the main sign of leakage. If the cause of oil ingress is not eliminated in time, it will lose power in all or certain operating modes, which can also result in. Most likely, for a reason, Check Engine will light up in the cylinders on the dashboard.

The negative effect of engine oil on the seal of the tip of high-voltage wires, modules of ignition coils leads to such consequences. The oil environment creates favorable conditions for spark breakdown, as a result of which the combustion of the TPVS in the cylinder is disrupted.

Replacing oil seals on a VAZ 2112 1.5 l, 16 valves

To determine the type of device for candle cavities, unscrew the candles and look inside the well. The insert version has smooth walls from the beginning to the end of the hole. On VAZ 21126 engines, the joint of the mating surfaces of the valve cover and the camshaft bed will be visible.

To replace the oil seals on the VAZ 2112, it is necessary to dismantle the plastic cover, the inlet receiver, the ignition module, and the crankcase ventilation hose. The wells are removed using a slotted screwdriver (it is necessary to rest against the top border with the screwdriver). Make sure that the bottom seal remains on the tube after exiting. Clean the inserts before installing the oil seals. The lower oil seal must be lubricated with engine oil. Press the insert in with a suitable diameter adapter until it clicks in.

The candles will be unscrewed at the time of work, so make sure that no debris or third-party objects get into the cylinders.

In the video you can see how, using a homemade puller, you can get inserts for replacing the oil seals of the spark plug wells without removing the valve cover, receiver.

Engines 21126

On Lada Priora, Kalina, Grant cars with ICE model 21126, it is necessary to remove not only attachments and a valve cover, but also the camshaft gears and bedding. Eliminating the cause of oil entering the candle wells is to apply a high-quality anaerobic sealant. Using a silicone gasket will not be as effective.

The sealant must be applied in a thin layer to the mating surfaces of the camshaft bed. Too thick a layer when the parts are clamped will squeeze the sealant inside the cylinder head, which can cause clogging of the lubrication system lines. After installing the valve cover, the internal joints in the spark plug well are also recommended to be coated with a gasket sealant.

Sealing threaded connections

The penetration of debris, foreign objects into the engine cylinders, cylinder head, can lead to a decrease in the resource and serious damage. Therefore, perform all work as carefully as possible.

THE MAIN REASON

Oil enters the candle wells through the leakage of the joint of the elements separating the well from the inner space of the cylinder head. There are several options for the design of the block head.

CASE VENTILATION SYSTEM

The increased pressure of crankcase gases is one of the main reasons for the accelerated breakthrough of oil through the seals of the spark plug holes. The principle of operation of closed-type crankcase ventilation involves supplying a mixture of oil vapors, gasoline and exhaust gases back to the intake manifold.

In case of heavy fogging around the valve cover gasket, oil pan, oil in the air filter, spark plug wells, we strongly recommend checking the crankcase ventilation. At elevated exhaust gas pressures, replacing the gaskets with an anaerobic sealant will only have a short-term effect.

SYMPTOMS AND EFFECTS

To determine the malfunction, it is enough to pull out the tips of the GDP / ignition modules from the wells and unscrew the candles. The oil film on the elements will be the main sign of leakage. If the cause of oil ingress is not eliminated in time, the engine will start to triple, lose power in all or certain operating modes, which can also result in high fuel consumption. Most likely, due to misfire in the cylinders, the Check Engine will light up on the dashboard.

REPLACING OIL SEALS FOR VAZ 2112 1.5 L, 16 VALVES

The candles will be unscrewed at the time of work, so make sure that no debris or third-party objects get into the cylinders.

In the video you can see how, using a homemade puller, you can get inserts for replacing the oil seals of the spark plug wells without removing the valve cover, receiver.

ENGINES 21126

SEALING THREADED CONNECTIONS

On Toyota cars and other cars with a similar type of device, repair consists in lubricating the lower and upper threads with sealant. To remove and then install the tube, it is necessary to screw and lock two nuts. It is also necessary to replace the cuffs sealing the joint of the well insert and the valve cover. Detailed instructions for removing attachments, tightening torques, you can find in the repair and operation manual for your car model. We offer you to watch a video of the repair.

The penetration of debris, foreign objects into the engine cylinders, cylinder head, can lead to a decrease in the resource and serious damage. Therefore, perform all work as carefully as possible.

Any malfunctions in the car must be repaired immediately, otherwise complications may follow and, as a result, complex and expensive repairs will be required (in most cases this is not an exaggeration, but a fact).

Some cars have a number of drawbacks that the owners are ready for when buying. For many motorists, oil in Priora candle wells has become commonplace, although this phenomenon is not so common. And therefore, the owners of domestic cars are trying to solve this problem as soon as possible.

You can carry out repairs on your own if you have the skills to restore transport, no difficulties will follow during execution.

Why does Priore accumulate oil in candle wells and what does this lead to?

The problem is common in 1.6 liter engines. In the early versions, there were rubber gaskets under the valve cover, and in the updated ones, only a sealant is used to tightly fit the parts.

For the modern Priora, the oil in the candle wells is formed as a result of the drying out of the sealant after prolonged use of the car or when using a low-quality composition. Therefore, completely removing accumulated oil and old sealant will be the right solution to the problem.

This is the case when the plant tried to cut costs and simplify the design. However, they did not take into account one simple rule: "Kroilovo leads to a hitalov." This principle can be applied to all occasions in life, and in relation to your car the same.

Oil can be collected in the Priora well even in a completely new car, therefore, immediately after the purchase, it is worth checking the transport at a service station or in your own garage. Otherwise, a brand new car can present a very unpleasant surprise, and the reason for such a dirty trick is solely in the used sealant.

It is highly likely that after the release or long-term downtime of the car in the cabin, the low-quality composition will simply dry out. And as a result of test or the first long trips, oil will accumulate in the wells. And in order to avoid expensive repairs on the purchased model, you should not miss the opportunity, but check the quality of the installed system.

If the oil stays in the candle well for a long time, then the rubber insulator of the candles will soften as a result. This will lead to a very serious problem - piercing candles, insufficient receipt of specialized oil by the engine.

Naturally, such a phenomenon will cause unstable operation of the power unit, as well as subsequent more frequent diagnostics and replacement of spark plugs. Therefore, for Priora in candle wells, oil is considered, although a common problem, but rather acute. And as a result, it requires immediate permission, otherwise untimely repairs may be needed when the car simply stalls on a suburban highway.

What to do if oil has accumulated in the Priora candle wells?

Novice motorists are advised to contact a specialized service station for the correct repair. If the owner wants to save on repairs and carry them out on his own, then you will need a detailed study of the instructions and follow them exactly.

Since oil in the candle wells is not only an unpleasant, but also a rather serious problem for Prior, it is necessary to start solving it as early as possible.

A full-fledged repair is carried out according to the following scheme:

1. The intake manifold is removed.

2. Remove the timing belt cover and the belt itself.

3. Remove the valve cover.

4. The camshaft is removed and the old sealant is removed from all surfaces. Let's dwell on this point in more detail. The phrase "the old sealant is removed" does not mean that you can pick it up with a screwdriver or knife! In no case should you do this! The metal will remain scratched and sounded and you will never be able to seal the parts.

They will snot with oil and suck in air. The sealant can be removed with gasoline, acetone, white spirit. We just moisten a cloth and rub the surface until we clean the part.

5. The surface of the lid is coated with anaerobic sealant, and the assembly is carried out in the reverse order.

Such a system is quite simple, but it also requires careful lubrication of the joints between the joints of the wells with a sealing compound. Do not forget about the wells themselves, because the elements quite often contain the old composition on the walls. They are usually quite thoroughly covered with sealant and should be wiped off the surfaces as well.

All this will allow you to remove oil and sealant in the candle wells on the Priora and achieve an optimal state of the system and normal engine operation.

It is imperative to wash off the old sealant. If residues remain, they can interfere with the correct and high-quality sealing of the parts. As a result, the above operation will need to be repeated.

The work costs are minimal, since only one tube is enough to cover all surfaces. It is also important to take into account that Priora oil accumulates in the well if it is not properly sealed again, and as a result, loss of personal time will be required for another repair.

It is necessary to use a special red sealant to handle the connection of the wells, which can be purchased at any car store or workshop. But when carrying out work, it is important to remember about the correct installation of the camshafts and all other parts.

Correct operation of the system will only be guaranteed with careful assembly of all removed elements. If the work was carried out incorrectly, and more serious problems followed: breakdown, deterioration in the operation of the power unit, then it is recommended to contact a professional workshop to perform high-quality repairs.

For owners of models with a 1.5 liter engine, such a replacement is not suitable. Since it will be necessary to purchase new gaskets and install them between the connecting parts. In particular, the cost of such repairs will be very insignificant. But it is worth remembering about breaking the candle, and that later the coil may simply fail.

During repairs, experts recommend using a heat-resistant sealant, as well as high-quality oil, which, in the event of a leak, will more slowly corrode the insulation. It is also worth removing not only the old sealant, but also the formed carbon deposits, because it also negatively affects the work of the candles. The normal functioning of the car will be ensured only if its normal state is maintained.