How to remove the head on the engine. Repair of the head of the cylinder block from "A" to "Ya. Video: Installation of GBC VAZ. Step-by-step instruction

The head of the cylinder block is made of aluminum alloy with a definite percentage of copper and tin, in order to give it softness and elasticity. With such properties, it is tightly pressed against the gasket, preventing the breakthrough of gases.

The whole head is attached to the cylinder block eleven bolts, ten large and one small, which are delayed with a certain sequence and effort.

Replacing the gasket

1. The head of the cylinder block is removed from the engine assembly with intake and exhaust manifiers.

2. Disconnect the wire from the "minus" terminal rechargeable battery. We merge the coolant.

3. Remove the carburetor.

4. Remove the ignition distributor with high-voltage wires.

5. Remove the block cover of the block.

6. Remove camshaft Assembly with bearings housing. Disconnect from the exhaust manifold graduation system and remove the coolant cutting fluid tube from the heater radiator.

7. Remove the chain from the camshaft.

8. Disconnect the supply hose from the heater radiator pipe.

9. Remove the hoses from two pipes of the cylinder head.

10. The key "On 13" turns over the cylinder head fastening bolt near the ignition distributor.

11. Head "At 12" turn the ten bolts fastening the head to the cylinder block.

12. We take out bolts from the holes.

13. Remove the head of the cylinder block assembly with collectors

14. Then remove the block gasket.

15. Install the head in the reverse order. Block head gasket replace to a new one.

16. Two sleeves are installed for centering the laying and head in the block.

17. Tighten the block bolts in two receptions. First, the bolts №№ 1-10 are tightened with a moment of 33.3-41.16 N.m, and then tighten them with a point of 95.9-118.3 N.M. The latter tighten the bolt number 11 with a moment of 30.6-39 N.M.

Refinement

Remove the GBC (cylinder head)

I eliminate disadvantages of casting cd and collectors (gluing the GBC and combine collectors). Through ham and skins.

It is fundamentally important: intake channels should not be polished! If the surface is polished (mirror) the mixture is condensed with scribe. In the channels we remove tides and irregularities.

Frewever GBC by 1 mm.

Rinse the GBC by all available means (gasoline, kerosene, washing powder, etc.)

We check whether the valve is not bent (4 hours worked in vain). If necessary, we buy new ones and carry the triotheral paste, causing drops to the support surface of the valves. For convenience, glue the nut on 17 to the superclock valve

Casting the valve by inserting new oilmaging caps and install the rockers and collectors with a carburetor so that all channels perfectly coincided

Then the work was created already on the engine installed in the rotory space

We install the GBC, along with this, we certainly buy new GBC bolts (length 120mm). Observe the order and torque of the tightening.

Torque

Take the dynamometer key and tighten all the pins according to the order specified in the diagram. At the same time, the moment of the broach should be 3.5 - 4.1 kgf * m. First of all, it is necessary to pull two screws located in the middle. Then, in order to comply with the correct order, two upper and lower pins located on the sides of the middle elements are tensioned. Further, the two extreme pins are tensioned - first left, then right. At the same time, the element under the eleventh number does not need to be touched.

After these actions are completed, you need to pull the pins again, in the same sequence. Note, now the torque torque torque must be 10.5 - 11.5 kgf * m.

After these actions, it remains to tighten only the screw at number 11. Do it with a dynamometric key, and the moment must be 3.5 - 4.0 kgf * m.

Remove

By itself, this procedure is not so difficult, but requires small preparatory work. And immediately I will give a list of the necessary tool, without which it is easy to do not do when performing this repair:

Current with extension

Patty handles

Head at 19 and 10

First, if you are gathered to repair the engine, then it is necessary to drain the cooling fluid.

Then you need to remove the camshaft, because bolts GBC. They are simply impossible to get to them, without removing the camshaft.

And it is also necessary to disconnect the coolant supply tube to the head, which is located with the right back of the engine, as shown in the photo below:

And disconnect the tube, removing it a little to the side:

You also need to disconnect the plug from the temperature sensor, which is shown in the photo:

Now everything is ready and you can start unscrewing the cylinder head mounting bolts to the engine block using a rather powerful head knob:

After the bolts have weakened, you can use a ratchet handle to accomplish this procedure several times faster:

After all the head bolts are unscrewed, you can lift it, holding the front part, or as it will be more convenient for you:

Now a few words about installing the GBC back to the block. First, it is necessary to replace the gasket, as it is installed at a time. Of course, it is pre-clean the block and the surface of the head from the traces of old gaskets. I did it with special tools To remove traces of Ombra of Dutch production, causing this fluid to the entire surface of the GBC:

As a result, after about 10 minutes of waiting and thorough work with a conventional brush for clothes, a rather tangible result is obtained. For comparison, it was decided to do as follows: the first three combustion chambers cleaned with various means, ranging from gasoline and ending with WD-40, and the last exactly of this special means.

Installation

Remove the chain from the sprocket of the camshaft

Disconnect the supply hose from the heater radiator pipe

Remove hoses from two cylinder head pipes

The key "On 13" turns around the cylinder head mounting bolt near the ignition distributor

Head "on 12" turn the ten bolts fastening the head to the cylinder block

Take out bolts from holes

Remove the head of the cylinder block assembly with collectors

We remove the gasket of the block of the VAZ 2106 block. Install the GBC in the reverse sequence. Block head gasket replace for new

Two sleeves are installed in the layout and head of the gasket and head. Tighten the block bolts in two receptions. First, the bolts №№ 1-10 are tightened with a moment of 33.3-41.16 N.m, and then tighten them with a point of 95.9-118.3 N.M. The latter tighten the bolt number 11 with a moment of 30.6-39 N.M.

The order of tightening the cylinder head fastening bolts on VAZ 2106 engines

Tuning

1. Recruit and remove

Camshaft cover

Chain tensioner

Star camshaft

Camshaft

2. Remove the GBC (cylinder head)

3. Emipproof and pull out the valve, springs and rocker

4. Issue the old guides from the combustion chamber if there is a flavor of the valves. For this, the head with a hexagon is suitable. # 6

5. Eliminate defects of casting cylinder heads and collectors (gluing the GBC and combine collectors). With the help of shag and skins.

IMPORTANT: Intake Channels should not be polished! If the surface is polished (mirror) the mixture is condensed with scribe. In the channels we remove tides and irregularities.

6. Milling GBC by 1 mm.

7. We establish new guide valves, pre-lubricating oil. For this, the head # 11 with an extender and a hammer is suitable.

Better to do it at home (at room temperature)

8. We check whether the valve is not bent (in vain 4 hours). If necessary, we buy new ones and carry the triotheral paste, causing drops to the support surface of the valves. For convenience, glue the nut on 17 to the superclock valve

9. Dress up the valve, inserting new oilmaging caps and install the rockers and collectors with a carburetor so that all channels perfectly coincided

10. Remove the GBC, and we definitely buy new GBC bolts (120mm length). Observe the order and torque of the tightening.

Assembly

And so before we proceed to the disassembly and subsequent assembly of the head of the cylinder block, we need to prepare the whole required tool, namely wrench on "13" "17" "21", a candle wrench, a fixture for compressing valve springs, a round bunch and a screwdriver, if everything is necessary, then you can now begin to remove the cylinder head, about how it is right It was painted in the "Engine" section in the article "Replacing the gasket of the head of the cylinder block".

Now you need to unscrew the bolts of fastening the intake and exhaust manifold. Remove the inlet tube along with the carburetor assembly and the outlet tube with gaskets, unintended washers. Remove the fastening nuts of the exhaust pipe of the cooling shirt, remove it after removing the gasket. Remove the chain tensioner fastening nuts and remove it. Unscrew the nuts for fastening the fluid supply to the heater and remove. After that, turn out all the spark plugs. Remove the cooling system sensor. Remove the chain reassureer attachment bolts and remove it.

At the next stage of the work on disassembling and assembling the head of the cylinder block, you need to remove masonry Caps (See Replacing the oil-giving valve caps). After removing them, remove the valves from the guide sleeves. Remove the locking plates of the springs of the levers. If necessary, if you interfere with the carburetor, remove it, for this, unscrew the four fastening nuts. Build a cylinder head assembly produce in reverse orderIt is recommended to replace all gaskets with new ones when assembling.

To compact the connection of the cylinder block with the head block of the cylinder, a special gasket is used. It has holes for: tightening bolts, passing the coolant and engine oil from the cylinder block into the head of the cylinder block, as well as the combustion combustion chambers.

Due to the fact that consumables Increased requirements are imposed, in its composition it has metal rings located at the point of contact with the gasket of the GBC with the combustion chamber and protect it from the combustion temperatures fuel mixes And, as a result, premature wear.

What are the gaskets of the GBC

Currently, gaskets are divided into 3 types depending on the material of the manufacture:

• asbestos, elastic, elastic;
• basesbestos, slightly change their geometric shape during operation, but it is quickly restored;
• metal, durable and reliable.

The choice of type depends on the requirements of the motorist and its financial capabilities.

Because of which the gasket of the GBC is changed

The main reasons for the replacement of only two are:

1. engine repair, implying removal GBC (Laying in essence is disposable, it is associated with high requirements for its properties, since when it is high, the likelihood of its leakage adjustment to the surfaces of the DVS parts) is high);
2. the fault of the gasket (over time with a certain type of driving, low quality of the gasket, the gasket is not properly correctly installed and, as a result, the loss of power of the DVS with subsequent irreversible DVS malfunctions).

What makes a malfunction of the GBC laying and its late replacement

Consequences of operation vehicle With a faulty gasket depend on the detection time of this malfunction. For example, if the fault is detected immediately after its appearance, you only need to replace the gasket. When operating a car with a faulty gasket, the GBC is possible:

1. glowing the cooling system nozzles as a result of pressure increase due to processes passing in combustion chambers;
2. the engine overheating with a loss of the geometry of the cylinder block head, which can lead not only to additional work on the restoration of the GBC geometry (surface milling), but also to the complete replacement of the cylinder head;
3. engine jamming. This malfunction may appear as a result of poor lubrication of rubber surfaces due to the coolant input to the lubrication system, and as a result of the hydraulic impact (if a car with a burned gasket of the GBC was standing for some time, then as a result, a sufficient for hydraulic impact may flow into the cylinders Coolant). The cost of eliminating the junction of the OBS will be equal to the cost of capital repair of DVSor the cost of new ICE.

If you know that the gasket of the CFC of your car is faulty and the car was not working for some time (sometimes one night is enough), then better car Do not exploit before troubleshooting. If you still decide to reach the place of repair "by its own way", then to avoid hydraulic impact it is recommended to unscrew all the candles before starting the engine and scroll into a few revolutions to remove the liquid out of the cylinders, after which install the spark plugs and start engine.

How to determine that the gasket of the GBC requires replacement

No skills to determine the malfunction of the gasket is not necessary, for this it is necessary to periodically inspect the car under the hood. With a faulty gasket, the engine power is slightly lost, but it is quite difficult to notice, and the cooling fluid flow rate increases.

When inspecting the car it is worth paying attention to the following points:

• increased coolant consumption;
• the leakage of the coolant or oil at the site of adjusting the head of the cylinder block to the cylinder block;
• the appearance of oil spots on the coolant surface in expansion tank;
• squeezing the coolant through the expansion tank or the radiator lid;
• light impurities B. motor oil (explicit sign getting a cooling fluid into the engine lubrication system);
• coolant drilling with dVS work on high revs and under load;
• changing the nature of exhaust gases, which can talk about getting into the combustion chamber of the coolant.

Procedure for replacement

The replacement process is quite laborious, but with certain knowledge and the availability of a special tool (dynamometer key) is not very complex. The replacement will be performed almost on any hundred, but you can also perform with your own hands. The price of the part is from 1000 to 3000 rubles, and in the service station, the work on replacing the GBC gasket will cost in the amount of 5000 rubles and higher. For example, consider the procedure for replacing the gasket GBC on domestic car Family Vaz "Classic".

If the coolant will not change, then drain it into a clean capacity, and if it is changed, then in any capacity for subsequent disposal.

2. Remaining attachments restricting access to the head of the cylinder block:

• sapuna hose;
• air filter with housing;
• carburetor;
• cooling system nozzles (reaching the radiator and to water pump);
• receiving nozzle of exhaust gases;
• high-voltage wires, spark plugs and rubber.

For the convenience of removal, you can additionally remove the exhaust pipeline and the intake manifold, but then it will be necessary to change the gaskets and under them.

We unscrew 8 nuts fixing the valve cover.

4. Remaining the camshaft:

• weakening the chain tensioner;
• we unscrew the GRM drive fastening bolt, after having renounced the stopper of the battered washer;
• we unscrew the bolts of fastening the camshaft first the edges and only then the central.

To prevent the drop in the chain down, it must be suspended, for example, using ordinary wire.

5. Removal.

We unscrew the mounting bolts in a circle and remove the head of the cylinder block.

6. Replacement.

Before installing, it is necessary to carefully clean the surfaces of the parts from the old one. This is an important moment, since if the surface of the parts is not well cleaned, it will lead to a loose fit of the new gasket. As a result, after some time, the GBC laying will have to be changed again.

7. Engine assembly, which is carried out in the reversal order. At the same time, it is necessary to know the order and the method of tightening the fastening bolts for the engine of your car. Also, a dynamometric key will be needed for fastening the head of the cylinder head, it will eliminate the thread in the cylinder block when tightening the cylinder fastening bolts and will provide the optimal protracted moment of the bolts recommended by the manufacturer's plant.

First time after replacement it is necessary to track the absence of the fault of the gasket described above.

Also, if you decide to replace the gasket with your own hands, come to this procedure with a maximum responsibility, or if you doubt your strength, entrust this work to the specialists.

Video

Check your car and model repair manual. It describes step-by-step procedures with images that explain how to replace the head gasket. The manual will also describe all the necessary tools that you may need.

Drain all the oil and coolant from the engine. Remove those details that are located at the top of the head laying. Read the service manual of your car, but in most cases this procedure includes the removal of the exhaust manifold, the intake manifold, the valve cover and drive belts. On many engines, you will need to remove the toothed belt or chain of the gas distribution mechanism. Try to explore the timing strap or chain alignment procedures and make sure that you clearly see the alignment label before dismantling the synchronization components.

• Learn how to remove each detail. Or take a picture and write down to be easier to remember as soon as you finish.
• The gasket is a thin piece of sealing material that can be seen as soon as you remove the head.

• Check the block to make sure that it has not happened straightening and send the head or head into the car mechanically shop so that they are tested under pressure. If the pressure test does not show crack, let the mechanical workshop restore the head. Never try to reinstall the heads of the cylinder block, which was not professionally restored.

  • Check in the service manual of the head specification to find out if you need to replace the bolts when the head laying will be replaced.

  • Clean the head and block surface. Do not scratch and do not damage any metal parts, as it can prevent this head laying tightly.

    Clean the holes for the bolts that fix the head in the block.

    Install the head laying on the block. Use the sealant specified by the manufacturer and only the desired number in certain places. The deviation from the manufacturer's recommendations may damage the internal parts of the engine.

    Install the block with a head laying in place.

    Use the targeted wrench to tighten the head to the block. Check out the service manual to determine the bolt head, as well as the number of revolutions that should be applied to each step. Some head bolts require three steps plus a rotation on a certain amount of degrees at the end.

    Replace other engine components that you removed.

    Set the drive belt of the gas distribution mechanism or chain back to the proper position, gently rotating the camshaft and crankshaft. Make sure that the engine does not interfere with anything. If there is something there, there is a very specific method that consists in turning and setting the camshaft on the crankshaft so as not to damage and not bend the valves! If possible, install the distributor so that it properly approached each cylinder. If necessary, adjust the valve clearance by following the manual.

    Pour the new oil into the engine, replace oil filter And fill in the cooling system with a new factory agent. When you run the engine, make sure that the engine works at idle on full power. It is necessary that the cooling system can drive all air bubbles. Some engines require a special air intake procedure in the cooling system, we recommend reading this separately.

In this article, you will learn how to replace the VAZ 2109 laying, as well as valve triggering. Of course, if you do not have the experience of repair, it will be very difficult to make such work. It is worth noting that most drivers simply are afraid to climb into the engine, as they do not want to face difficulties. But if you look at a little more careful, then there should be no problems if you study the process of carrying out the process of carrying out in advance. Independent replacement Pads are possible if you have the entire necessary tool, including without it in this case, it is easy and the step cannot be stepped.

In what cases is changing the gasket

And now it is worth talking about why the cylinder head laying is changing. First, it is quite often possible to purchase low-quality products. Secondly, sometimes the cause of the replacement becomes a violation of the gasket integrity, as a result of which antifreeze leak occurs. Moreover, all the cooling fluid is mixed with oil, as a result of which it decreases for various reasons, but the most frequent - uneven tightening of the fastening bolts.

Often, spent gases begin to break into the cooling system. In this case, antifreeze begins to throw away from the radiator. True, there is an expansion tank that allows you to correct this trouble. In addition, the removal of the cylinder head on the VAZ 2109 is necessary in the case of overhaul Engine. Also, when repairing the valve mechanism, it is necessary to replace and if it is simpler, then with each removal of the cylinder, the gasket changes.

Preparation for replacement

IN carburetor Vaz 2109 The replacement is performed almost the same as in the injection. First, turn off from the wire carburetor, two cable, from the back of it. In other words, it's all that you need to do when removing the carburetor. After that, you need to dismantle the ignition distributor. To do this, disconnect the chip with the contacts that the Hall sensor is connected. Before starting to conduct such work, you need to turn off the battery from the power supply system. Then remove all the armofotts, do not forget that there is still a hose that connects the carburetor with a vacuum ignition corrector. At the same time, the ignition distributor is not necessary to completely remove from the car, it is enough to remove it to the side.

Drain of coolant

Now it's time to drain the coolant. This requires a capacity of about 10 liters, the key to 13. The first thing is fluid from the radiator of the cooling system. Install the capacitance under the drain hole, then the plug is twisted, but you should not forget that without twisting the plug on the expansion tank there will be no fluid to merge. So that the GBC gasket replacement is carried out on the VAZ 2109, there is no need to completely empty the cooling system.

Then the container is installed under the drain hole, which is located on the internal combustion engine. The plug is turned off using a key to 13. After you have a salt of antifreeze from the system, you must remove the rubber pipes. The topmost, which connects to the radiator, then the stove pipe, and the most last one that the thermostat is connected. If necessary, you can unscrew the dural insert on the engine block.

Next steps

To be held on the VAZ 2109 replacement of the cylinder head gasket, it is necessary to dismantle the fuel pump. To do this, turn off the hoses from it, after which the key to 13 unscrew the two nuts. Now you can stretch the gas station and plastic guide. It has failed - the disconnection of the exhaust manifold. It is necessary that the car is installed on observation pit. So much easier to carry out work. The bracket is removed at the very beginning, without this, "pants" do not dismantle. Four nuts, which fastened the "pants" flange. Weaken the clamp and remove the foster pipe. From the oil pressure sensor, the wire is turned off, but it can be done on top of the car. Now it remains to work a little with the mechanism of the gas distribution unit.

Belt Transmission timing

So, first the casing is removed, for this, three bolts are twisted with the key to 10. After that, weakened the key to 17. tension roller. The belt can be removed from the camshaft pulley. It is completely not necessary to remove it, it is enough to weaken and lead to the side. But from pulley it is necessary to get rid of, as it will interfere with the removal of the head of the cylinder block. To replace the cylinder head gasket of the VAZ 2109 cylinder, it is more efficient, you need to dismantle the camshaft pulley.

To remove the pulley of the camshaft, it is necessary to pose it with two screwdrivers with inner. Now the tension roller is fully removed and the stud is unscrewed, with which it is attached to the engine. It can be said that on this preparatory work is completed. Now everything is ready to remove the head of the block.

How the GBC is removed

First you need to unscrew the two nuts that the lid is attached. They are at the very top. After that, you can unscrew all the engine block mounting bolts. All of them are 10, the key is needed hex. That's all, after removing all bolts, you can remove the head of the block. Please note that on VAZ 2109, 2108, 21099 cars, the replacement of the GBC gasket is carried out at the same scheme. However, even dozens with an eight-shred engine, similar procedures are performed.

Pay attention to the fact that with any dismantling of the CFC it is necessary to change the gasket. Look at the old one, what does it have damage, breaks, progars. If the block head was removed, then do not be lazy to pay attention to the state of the valves, saddles, guide, caps and other elements of the gas distribution system. If you have time to repair this mechanism in a timely manner, the engine will be very grateful to you.

Installation of GBC

First of all, acquire a new gasket. Next, it must be put on the surface of the engine block. Please note that before starting installing the head you need to purchase new bolts. The fact is that when tightening and subsequent heating, the thread is deformed on them. As a result repeated tightening It may turn into a violation of the engine operation, even its premature failure. According to this scheme, the cylinder head of the VAZ 2109 cylinder head is replaced.

Before installing, it is necessary that the threaded holes are perfectly clean. With compressed air, remove dirt, oil, liquid from them. If foreign objects remain in these holes, then tighten the bolts to the end will not work, as a result of which exhaust gas leakage will occur in the cooling system. And this is at best, therefore, the removal and replacement of the gasket of the GBC on the VAZ 2109 is accompanied by the installation of all new fasteners.

Tighten all the bolts, this procedure is carried out in four receptions. Moreover, the sequence must be observed. First you need to delay at the moment 2 n / m. In the second stage, it is necessary to increase the force up to 8 n / m. The last two stages - the rotation of 180 degree bolts in two sites (90 degrees for each). But try not to drag, as you can easily disrupt the thread or also break the bolts at all. Now everything is going back, new gaskets are installed under the lid and pants. It is necessary to do, as oil leakage or exhaust rolling is possible. This is considered to be finished replacing the cylinder head of the VAZ 2109 cylinder head, but it is necessary to say a little about tapping valves.

How to Launch Valves

To do this, you will need a drill - even though manual, even electricity, just to have a reverse function. An old valve is also needed from which a small adapter needs to be made. It will be necessary to hold in a drill. In addition, you need to get a small piece of strong rubber hoses. You also need to purchase a tidy pasta. Please note that it happens two types - for coarse and fine ticks. It should also be borne in mind that you need to put the valve on the saddle to which he has grilled. Otherwise, the work will be broken completely. Sealing will not be between the plate of the valve and the saddle. It will be necessary to carry out this work in the event that the GBC is replaced. The head of the VAZ engine cylinder block must be tied to new valves.

Mandatory condition - the presence of a drill with a reverse. You need to turn the valve in different directions evenly so that the surfaces are as smooth as possible. It is worth noting that the coarse paste is first used, and after it removes all the small irregularities from the surfaces, it is necessary to erase it and impose fine-grained. The latter will allow to clean the plate of the valve and the saddle to the brilliance. Note that the wipe paste is an abrasive material, so it gets into the cylinder and other engine knots is unacceptable. Working with the wipes of the valves, spend away from the motor to exclude the ingress of pasta to the cylinders. Also, be sure to clean after the end of the process.

conclusions

In the article, you learned how to make a VAZ 2109 car replacement of the gasket, fill, pour, repair, repair, valve wrap. Please note that for the repair of the engine and replacing the gasket, it is necessary to have not only the tool, but also knowledge, without them you can only spoil everything. Try to work as much as possible during all the events so as not to damage the elements of the systems. Note that very often the cause of black smoke from exhaust system And excessive oil consumption is a strong wear of the valve seals. And if your engine has such symptoms, then do not be lazy to replace these seals.

Consists of several parts. One of them is the GBC. It is installed on the block itself, which can be cast-iron or aluminum. But regardless of the manufacturer's material between these two components, a gasket is installed. It does not give gases to break into the neighboring channels, including in the cooling shirt. But sometimes it happens that the GBC gasket struck. This is a serious problem. Why occurs to flow oils from under the head of the cylinder block and how to replace this item? Tell us in our current article.

The essence of breakdown

As we have already said earlier, the sealing element is between the head and block.

It provides tightness of the connection of the two components of the engine. Visually to estimate the state of this gasket is impossible. However, its malfunction is fraught with serious consequences. Experts identify the following reasons for the head of the Cylinder Block VAZ:

• Poorly tightened bolts. This is usually due to poor-quality repairs.
• The deformation of the strip itself (unfortunately, no one is insured against marriage).

It is not always due to the gasket appear butter from under the head of the cylinder block. Cause # 2 is overheating the engine. As a result, the GBC surface becomes uneven. Even after replacing the sealing element, the oil from under the head of the cylinder head does not stop. You need to grind the GBC or change it to the new one. The latter option is used often to the heads that have cracks. They will not be repaired. The design has already lost strength and tightness.

What threatens it?

If the GBC laying struck, you need to urgently eliminate this problem. Otherwise, gases can leak into the cooling system. Externally, it is manifested in white smoke from exhaust pipe. The consistency of the coolant is also changing. It will acquire a kind of carbonated mineral glass with a lot of small bubbles. Candles begin to be covered with oil. Ignition pass appear. The oil level itself is uncontrolled falls. If you look through his level, you can face due to this detail of the crank-connecting mechanism will work "on dry". The KSM resource is significantly reduced, there are buried on the walls of the cylinders.

In addition, the leaked oil begins to attract road dust. She settles on all elements power plant. It will be difficult to wash off such a flare, with the use of aggressive chemicals.

Debugg

What should I do if there is oil from under the head of the cylinder block? Out of this situation only one. This is the replacement of gasket GBC. Its cost can be different. For cars VAZ, the new gasket costs about 400-500 rubles. The price of the product for foreign cars starts from 700 rubles and higher, depending on the engine configuration. The cost of the replacement service is about one and a half thousand rubles. The operation requires dismantling many attached elements. But if you wish, you can repeat this procedure with your own hands. Below we describe the process of replacing the block gasket.

How is the replacement?

Running in advance, we note that an important condition during the replacement is proper tightening Head bolts. Only so you can achieve a dense and high-quality surface fit. Otherwise, the integrity of the gasket will break, and the oil will go out again, together with exhaust gases. The tightening torque for each auto is individual and indicated in the instruction manual.

Work is made to replace the gasket in several stages. First dismantled everything hinged equipment:

• Ignition coils.
• High voltage wires.
• Air nozzles and intake manifold.
• Sensors (provisions throttle valve, idle move etc).
• Vacuum amplifier hose.

Before removing the head of the cylinder block, you need to merge the coolant. Otherwise, when dismantling, you will fill it the entire engine. If the antifreeze is fresh, it can be reused. The main condition is a pure tank for drain and transparency of the fluid itself. If she lost her color (we will remind, it can be red, blue or yellow) or lounted, this product is not subject to reuse.

After that, it is retrieved when installing, you must use a new gasket for it. Also removed the timing belt.

Note!The distribution and crankshaft should not rotate until the belt will be set back.

How to remove cylinders? Keep in mind that the GBC bolts can accumulate. To prevent a breakdown of the key, clean the edges from dirt and deposits. Otherwise, unscrew the bolt will not work. Because of the messed faces, it can only drill it, which is extremely difficult and dangerous for the engine block.

Next, inspect the head fastening bolts. They should not be elongated. If this is so (for example, the length of the bolts on the engine "Lada Samara" is not more than 135.5 millimeters), they change to new ones. Before installing threads need to be treated in oil.

Installation

After extracting the old gasket, the surface should be prepared. How to do it? We purify the surface of the block from dirt (and the remains of the old gasket, if any), are carefully degreased.

The same applies to the site on the head. Both flushing surfaces must be extremely dry and clean. Next, the gasket itself is mounted. It is important to prevent its displacement relative to the seating holes. A hole for the passage of oil should be between the third and fourth cylinder. Sealant is already applied on the surface of the sealing element. It is not necessary to smear anything. Next, the head is put on the engine and is delayed with bolts. Distribution I. crankshaft Must be in the position of the upper dead point (when the first cylinder valves are completely closed).

Tightening

As for the tightening, it is produced in four stages. Consider technology on the example of the engine "Lada Samara" of the second generation. At first, the bolts are tightened with an increase in 20 nm. Further, the force increases to 70-85 nm. At the third stage, the bolts are in charge of 90 degrees, on the fourth - still on the same. After that, the gasket replacement can be considered almost completed. Now you know what to do if oils occurs from under the head of the cylinder block.

It remains only to collect all attachments, pour antifreeze and produce a trial launch. During the assembly it is recommended to check the gap between the valves. The tightening of the bolts is made by a torque wrench.

Conclusion

So, we found out why oils leak from under the head of the cylinder block occur. If the problem is detected, it is not necessary to postpone it "for later." Defects gBC pads Can cause serious damage to the engine, up to overhaul.