Replacing the cylinder head gasket on a VAZ 2107. How to replace the cylinder head gasket on a VAZ 2107 yourself

What is the function of the cylinder head gasket?

The cylinder head gasket is located between the cylinder head and the cylinders and performs several functions:

seals the place where the head adheres to the cylinder block;
prevents oil from leaking and coolant from entering the cylinders;
Restrains internal pressure and heat.

Thus, it separates three systems: gas distribution, cooling and lubrication. Experiencing heavy loads, it wears out quickly.

Gasket with traces of breakdowns

The following are signs that may indicate the need for replacement:

insufficient pressure in one or more cylinders;
foaming of the coolant, a drop in its level in the absence of an external leak, occurs due to gases entering the cooling system;
emulsion on the oil dipstick, an increase in the oil level in the pan, the reason for this is the presence of antifreeze in the lubrication system;
the appearance of oil stains on the surface of the coolant and the radiator neck indicates a broken gasket in the area of the oil channel;
white smoke in the exhaust gases, while the coolant level drops;
squeezing out the coolant fluid from the expansion tank in the form of foam indicates a violation of the tightness of one of the cylinders;
The coolant level drops and the engine boils.

The video describes the signs of gasket burnout.

Damage to the gasket may be caused by:

low-quality consumables;
overheating of the power unit;
improper tightening of cylinder head bolts;
insufficient coolant level;
Incorrect installation of the cylinder head.

When should you change?

Note that replacing the cylinder head gasket on a VAZ 2101-2107 is rarely done with your own hands. The manufacturer does not regulate the period for its replacement, since the part is installed for its entire service life. However, there are times when it burns out.

How to determine this malfunction? The first sign is engine overheating. The second is a leak at the junction of the block and the head. Both antifreeze and oil can escape from here. Also, these two fluids are mixed in the expansion tank. When the engine is running, there are small gas bubbles in the engine. All these signs indicate that the car needs to replace the head gasket. VAZ "Classic" is a simple car to use. Therefore, you can do this procedure yourself.

Need for replacement

There are few reasons for replacement and some of them require immediate intervention, while others not so much, that is, the vehicle can be used, albeit in a gentle manner.

Reasons for replacement:

Damage to the gasket in the area of the cooling system channel and the drainage channel of the lubrication system. When this happens, the coolant ends up in the oil pan and mixes with the lubricant. The result is a mixture with a brownish tint. This can be detected by checking the lubricant level in the power unit on the dipstick. This malfunction is also indicated by a decrease in the coolant level in the radiator. If you do not intervene in time, the consequences can be catastrophic, including the destruction of the power unit.
Damage to the gasket in the area of the cooling system channel and cylinder. This may occur due to a poor quality gasket or an incorrectly installed head.
Burnout in the cylinder area. This malfunction is detected and diagnosed by a decrease in compression in the cylinders and unstable engine operation.

Burnout between cylinders
Destruction of the gasket. If coolant begins to leak through the gasket and all efforts to tighten the cylinder head do not bring any results, then an urgent replacement is necessary.

Basic faults

There is damage to the gasket in which the operation of the VAZ 2107 is strictly prohibited. But there are also breakdowns in which it is still possible to drive. So, here is a list of the main breakdowns:

Destruction of the gasket between the lubrication and cooling channels. With such a breakdown, antifreeze begins to seep into the engine sump. Of course, mixing with engine oil occurs. If there is a suspicion of a gasket failure, then you need to remove the dipstick and check the lubricant level. It's also worth looking at the consistency of the oil. In this case, the antifreeze turns light brown. In the event of such a breakdown, it is strictly forbidden to even start the engine, as this can quickly lead to jamming.
Destruction between the cylinders and the cooling system occurs if the cylinder head gasket is of poor quality. It is quite possible that there was a weak tightening torque of the VAZ 2107 cylinder head during assembly. Under pressure, the integrity of the gasket is destroyed. The result is that air gets into the engine cooling system, and something terrible happens in the expansion tank. The temperature rises, there are huge bubbles and seething in the tank. Of course, it is undesirable to continue driving in this case.
Sometimes (much less often than in the two previous cases) destruction occurs between adjacent engine cylinders. The result is a significant decrease in compression and unstable engine operation.
And, of course, one cannot help but mention the banal marriage. In this case, the cylinder head gasket of the VAZ 2107 simply collapses, literally before our eyes. In this case, you can see how antifreeze begins to leak between the cylinder head and the engine block. In this case, tightening the bolts has no effect. Most likely, there is unevenness in the gasket itself, which leads to a similar result.

And now you have decided that you really need to replace the gasket, your car has one or more symptoms. What to do? Arm yourself with keys and other tools, and then begin preparation.

Disassembly

So, where does the replacement of the cylinder head gasket begin on a VAZ-2107 car? First, remove the air filter with a round metal housing (shown in the photo below).

Next, unscrew and take out the carburetor. After this, they begin to dismantle other attachments. This is the ignition distributor and high-voltage wires. After this, the coolant is drained from the engine. It is required to prepare a clean container with a volume of at least 7 liters.

Drain antifreeze correctly

On a VAZ-2107 car, replacing the cylinder head gasket is relatively quick. However, most of the operation will be draining the old antifreeze. The fact is that the “classic” does not have the familiar drain tap. There is a “traffic jam” here. How to perform this procedure correctly? So, we need a container and a meter of rubber hose with a diameter of at least 1 centimeter. We bring one end of it to the drain plug. With the other side, quickly press the hose against the hole. So the antifreeze will pour into our container. You need to be careful not to spill antifreeze on your hands.

What's next?

How to further replace the cylinder head gasket of a VAZ-2107? The next step is to remove the valve cover. It is secured with 8 bolts. It is important not to lose the pressure washers - they will be useful to us during assembly. The next step requires removing the timing element, namely the chain drive and gear. To do this, loosen the tensioner and use a wrench to release the locknut. The chain should now loosen. Now let's disassemble the gear.

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It is attached to the camshaft on a lock washer. Using a screwdriver and hammer, bend the stopper and unscrew the element outward. By the way, the chain does not have to be completely removed. The main thing is that it does not fall down. To do this, it is tied with a handy tool (for example, wire).

How to replace the cylinder head gasket next? The VAZ-2107 continues to stand still, and we move on to dismantling the camshaft. To do this, unscrew the 9 mounting bolts. Then we disconnect the exhaust pipe that goes to the exhaust manifold. It is installed on 4 brass nuts. If your pipe is screwed onto ordinary steel pipes, there is a risk of tearing off the pin. Be extremely careful. If there is rust or dirty deposits, use universal lubricant VD-40.

Step by step guide

VAZ 2107 cylinder head in the engine compartment

Many problems can be solved after tightening the bolts, but if this does not help, then a major overhaul of this unit may be necessary, which involves removing not only the cylinder head, but also other parts of the block. Some parts may need to be replaced, such as gaskets, valve stem seals and valve guides.

Tools

To work we will need the following tools:

a set of keys;
micrometer;micrometer
flushing liquid;
pliers;
hammer;
mandrels for removing and installing valves and caps;
torque wrench;torque wrench
tiles (preferably the spiral is closed);
desiccant.Valve desiccant

Before starting repair work on the cylinder head, it must first be removed and cleaned of dirt.

Stages

Preparatory work and head removal

The first step is to drain the coolant from the engine.
We remove the carburetor.
Having disconnected the pipes and hoses, remove the air barrier. Disconnect the hoses and pipes
Remove the head cover.
We align the marks on the crankshaft pulley with the mark on the camshaft drive and the marks on the camshaft pulley with the mark on its body as shown in the photo. Aligning the marks
By disconnecting the camshaft lock washer, loosen the chain tension.
Having torn off the bolt, remove the sprocket.
Unscrew the fastenings.
We remove the camshaft with the housing. Camshaft
Having previously made marks using a marker, remove the rockers. Removing the rockers
Disconnect the wires.
We remove the pipe and unscrew the bolts securing the cylinder head to the block.
We remove the head.
We inspect its condition and clean it of dirt. Inspection of the condition of the head

This video shows the process of removing the cylinder head.

Checking status

Now it's time to dry out the valves. This is done with a special device. If chips, cracks, and rust are not visible, we conduct a further inspection. We evaluate the condition of the saddles, the repair of which is recommended every two hundred thousand kilometers.

Changing guide bushings

We inspect the guide bushings; if they are in unsatisfactory condition, they must be replaced.

A special tool is used to remove them. If you don’t have this on hand, you can get by with pliers and a clamp. After removing the bushings, we measure their diameter. We buy similar ones, the size of which is 0.05-0.07 millimeters larger than the ones being replaced.

The guides are pressed in using a mandrel, an electric stove, a hammer and lubricant.

We place the head on a stand at the edges.
We place the electrical device under the place of work.
We wait until the metal heats up to about one hundred degrees (so that it expands).
Now you need to properly lubricate the bushing with grease.
Having removed it from the holders, we drive in new guides.
When all eight are replaced, we wait for the cylinder head to cool down.
The valves should not dangle and move freely, there should not be any jamming.

Checking the tightness of the head

Leak test

To ensure a tight fit of the valves to the seats, you must do the following. Using lapping paste, lubricate the valve and insert it into the head. There are several techniques for rotating it, here are some of them:

using a hose tightly placed on the part;
using a device very similar to a corkscrew.

The main sign of good valve lapping will be a specific matte surface of the seat in the place where it contacts the part.

The tightness of the head can be checked by pouring kerosene into the collectors; you can also use gasoline. If done correctly, there should be no leaks for the first five to seven minutes.

Attention! All engine parts must be washed with a special solution, this will ensure long-term and uninterrupted operation of the power plant for a long time.

When assembling the head, be sure to pay attention to the correct tightening of the bolts. It must be carried out strictly according to the scheme. In case of incorrect broaching, distortions may appear and, as a result, all your previous work will be crossed out. If you have any questions, watch the video.

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What to consider when choosing a new product

In order for the gasket to perform its functions, it must be resistant to elevated temperatures and have the ability to compress. These properties depend on the material of manufacture. There are several options for making gaskets: from asbestos, paronite, metal and their combinations.

Combined options, layers of which are made of different materials, combine several properties. Gaskets made of asbestos and metal alloys have increased resistance to high temperatures, but do not strengthen the seal between the head and the cylinder block. Products made of paronite and rubber provide high-quality sealing, but their limit for high temperatures is lower. When choosing a gasket, preference should be given to products of a combined type.

In order not to make a mistake when choosing a seal, it is necessary to take into account the characteristics of the power unit that is installed on the car. The VAZ 2107 can be equipped with one of three types of engines. They differ in cylinder diameter. The power unit 2103 has a diameter of 76 mm, while the 2105 and 2106 have a diameter of 79 mm. If you install a gasket of the wrong diameter, the edges of the seal will be damaged. Naturally, the seal will be broken.

When is it necessary to replace the cylinder head seal?

When a gasket burns out, the damage is significant: integrity is lost, the part loses its shape. In the event of a breakdown, the damage is minor, sometimes even invisible to the naked eye.

The gasket becomes unusable for the following reasons:

overheat;
During installation, fasteners are tightened with a deviation from the tightening torque standards;
poor quality refrigerant;
engine malfunctions;
defective, low-quality product.

The power unit overheats due to malfunctions of the cooling system elements: radiator, fan, etc. To burn out the gasket, it is enough to drive literally 500 meters. When installing the cylinder head seal, it is important to observe the order of tightening the fasteners and the torque to which they are tightened. If these rules are violated, the seal will be deformed and will subsequently be broken. Poor quality coolant can cause corrosion, causing damage to the seal material and even the cylinder head.

A damaged cylinder head gasket can be identified by the following signs:

interruptions in the operation of the power unit;
leaks of working fluids from under the cylinder head;
rapid heating and overheating of the motor;
traces of coolant in lubricants;
steam in exhaust gases;
condensation on spark plugs;
increased pressure in the cooling system, smoke appears in the expansion tank.

Symptoms vary depending on where the gasket is damaged. If the edges of the cylinder bores are damaged, the engine may overheat and the pressure in the cooling system may increase.

If the coolant gets into the combustion chambers, the engine will start to stall, since it will be diluted with refrigerant in the fuel assembly and will not be able to burn completely. White smoke with a specific odor will come out of the exhaust pipe.

If there is damage on the edge of the seal, leaks of working fluids may occur at the point of contact between the cylinder block and the head.

Signs of a burned out cylinder head gasket.

If signs of seal burnout appear, you need to take a comprehensive approach to diagnosis. Before you start replacing the seal, you need to make sure that this is the reason. To do this, you need to perform the following series of actions:

Having discovered fluid leaks on the cylinder block, you need to make sure that it is flowing exactly from under the head.
We start the engine and analyze the color and smell of the exhaust. If they look like white smoke or smell like antifreeze, turn off the engine and carefully unscrew the cap from the expansion tank. The presence of exhaust gases in the cooling system is indicated by the smell of burnt fuel.
We start the engine without a cap on the expansion tank; there should be no traces of oil or gas bubbles inside it.
We turn off the engine and let it cool. We take out the dipstick to measure the oil level and look at its color. If its level has risen too much for no particular reason or there are traces of white-brown liquid, this indicates a mixture of oil and refrigerant.
Let the power unit run for 5 minutes and turn it off. We take out the spark plugs and inspect the electrodes. If they are wet, then there is a high probability that coolant has entered the cylinders.

Reasons for proper tightening

As noted above, tightening is carried out after disassembling the cylinder head, and it, in turn, is most often performed when it becomes necessary to replace the gasket in model 2107. In most cases, a malfunction of the element in question is grounds for prohibiting further operation of the vehicle.

A very common problem is wear of the gasket in the area between the lubrication channels and those responsible for the circulation of antifreeze. In this situation, mutual contamination of working fluids occurs. The characteristic symptoms are:

oil dilution and a drop in its level;
change in the shade of antifreeze (it begins to look like tea).

Such a breakdown requires urgent repair.

The second variant of the VAZ-2107 malfunction is loss of tightness in the area between the cylinders themselves and the coolant supply system. Typically the culprits here are:

defective cylinder head gasket;
insufficient tightening torque.

Regardless of this, the same thing happens - air enters the cooling system, and after that:

coolant temperature rises;
The distribution tank is literally boiling.

Much less often, the gasket is destroyed in the space between the cylinders. Signs of a malfunction include a drop in compression and unstable operation of the engine.

Many people look for the reasons for the failure in other places if they have recently replaced the cylinder head gasket, but this is just a waste of effort. The fact is that now such elements are often of low quality, and are sometimes produced in artisanal conditions. As a result, the seal fails in a matter of months. Take a close look to see if there are any leaks of antifreeze in the space between the cylinder block and the engine. If so, try tightening the bolts. When this measure does not help, then most likely the problem is an uneven gasket.

Removing the cylinder head

Sequencing:

Remove the battery. This will provide convenient access to the GBS head and protect against short circuits.
Remove the air filter.
Remove the carburetor on the carburetor version of the engine.
Remove the ignition wires and distributor (if equipped).
Drain the coolant from the cylinder head by unscrewing the plug. Before draining, you need to wait until the engine has cooled down.
Loosen the clamps and disconnect the rubber pipes of the cooling system going to the cylinder head.
Remove the valve cover by unscrewing the 8 nuts and removing them along with the shaped pressure washers.
Loosen the chain tensioner by unscrewing the fixing nut. For convenience, you can completely dismantle it.
Using a screwdriver and hammer, bend the edges of the lock washer on the camshaft gear mounting bolt and unscrew the bolt. Remove the gear. Tie the chain removed from the gear with wire so that it does not fall into the engine sump.
Unscrew the camshaft mounting nuts (10 pieces) and remove it.
Unscrew the brass nuts securing the exhaust pipe to the exhaust manifold and remove it along with the gasket.
Using a powerful wrench, unscrew the 10 bolts that tighten the cylinder head and the eleventh bolt installed on the head casting. Remove the head. It is quite heavy, so in order not to scratch the car, it is better to remove it from the block together.

Video about replacing the cylinder head on a VAZ

Video “Replacing a burnt gasket on classic Lada models”

In this video, an experienced master will clearly show and explain in detail how to correctly change the cylinder head gasket on classic Lada models. On a VAZ 2107 with an injection and carburetor engine, all work is carried out according to the same scheme.

Replacing the cylinder head gasket of a VAZ 2107 on an injection engine is carried out in the event of its breakdown when coolant begins to flow into the cylinders. To carry out repairs, it is necessary to drain the coolant from the unit by unscrewing the drain plug in its lower part.

The order of dismantling work is as follows:

After draining the coolant, remove the battery from the car.
Disconnect the power wire from the temperature indicator sensor. The sensor is screwed into the block head.
We remove the exhaust pipe. To do this, unscrew the nuts securing it to the intake manifold studs.
Now you need to remove the upper housing assembly with the camshaft. Before removing it, it is necessary to set the piston of the fourth cylinder to the TDC position. We remove the upper housing, and then tie the camshaft drive chain with wire so that it does not fall through.
Remove the starter heat shield by unscrewing the nut securing it.
We disconnect the ground wire from the intake manifold stud, and then remove all the pads with wires from all sensors. Disconnect the wiring harness from the idle speed sensor and the wiring harness from the fuel injectors.
Disconnect the throttle valve drive cable and remove it. Unscrew the nuts securing the bracket and move it to the side. Disconnect the coolant drain hose from the throttle body.

At the next repair step, we need to remove the thermostat bypass pipe and the radiator inlet pipe. Next, remove the car interior heating hose from the pipe.
Disconnect the fuel supply pipes from the fuel rail.
Remove the vacuum hose from the receiver pipe.

Now that all the attachments have been removed from the cylinder head, you can unscrew the bolts securing it to the block. To do this, unscrew ten internal bolts with a socket wrench and one outer bolt with a thirteen key. After unscrewing the bolts, you can remove the cylinder head and gasket.

Replace the gasket with a new one and install it back on the cylinder block, having first passed the camshaft drive chain through the opening. Before installing the block head, measure the length of the bolts using a caliper; their length should not exceed 11.5 cm; if exceeded, replace the bolts with new ones. At this point, the repair work on removing and replacing the cylinder head gasket of the VAZ 2107 is completed.

Cases when it is necessary to replace cylinder head gaskets

Replacing the cylinder head gasket of the VAZ-2107 is mandatory in a number of cases:

If there is damage near the combustion chambers, engine overheating leads to this unpleasant situation. When the cooling system malfunctions, and the driver prefers not to pay attention to the malfunction and puts off repairs, the condition of the cylinder block and its head leaves much to be desired.
A leak of antifreeze or coolant is noticed - a breakdown is often accompanied by incorrect operation of the ventilation device, thermostat, or a banal leak of substance from the hoses.
There is an engine oil leak. If traces of oil leakage are noticed on the outside, it means the gasket is not fitting well. Tighten the head bolts, if this does not help, then you will have to replace the cylinder head gasket yourself.

Finding the cause of gasket damage

After the VAZ 2107 cylinder head is removed, you should inspect the gasket for damage and try to determine the cause. If the cause is not identified and eliminated, it is possible that the new gasket will soon also burn out.

Burnout of the gasket between the cylinders occurs due to engine overheating, constant detonation of low-quality fuel, or cylinder head deformation due to temperature effects or improper tightening. In this case, you will have to grind or change the head before assembly.

The gasket can be destroyed by rust. This happens if water is used in the cooling system instead of antifreeze. The VAZ engine is not designed for cooling with water, so after installing the gasket and cylinder head, it is necessary to flush the system and fill it with antifreeze.

Another reason for the destruction of the gasket is its poor quality. In this case, it is enough to simply replace the gasket with a good one.

Assembly

Pay attention to such a moment as tightening the cylinder head. A lot will depend on this operation. If you do not apply force, the gasket will burn out and the engine may boil. Therefore, experts recommend using a torque wrench (see figure below).

The bolts are tightened according to a special pattern - from the middle to the edges. The first tightening force is 4.1 kgf per meter. The second one is 11.45. This applies to ten large bolts. What about the little one, 11th? Here the tightening rate is 3.8 kgf/m. If your key is designed for Nm, the first tightening requires a value of 40 units. The second is produced with a force from 95 to 117 Nm. After replacing the cylinder head gasket on a VAZ-2107 car, you need to install the camshaft and split gear back. It is important to adjust the timing drive. Yes, on an 8-valve engine the pistons will not come into contact with the “plates”. However, there will be significant misfires (to the point where the engine simply won’t start). At this point, the replacement of the VAZ-2107 cylinder head gasket has been successfully completed. You can make the first start and check the operation of the motor. Don't forget to pour antifreeze into the system.

Removing the cylinder head - important points

Before working on the head, you need to remove the timing chain. To do this, carefully loosen its tensioner, and then completely dismantle it. Then comes the turn of the camshaft gear. It is held in place by a bolt - unscrew it. It is important that the chain does not fly off the sprocket - fixing it with a piece of thick copper wire will save you from this trouble.

Now proceed to disconnect the camshaft - it is screwed to the cylinder head in 9 places. Their tightening is not too strong, and therefore there will be no difficulties at this stage. Otherwise, use WD-40 again.

With the shaft removed, disconnect the fuel inlet pipe and exhaust manifold. From this point on, nothing prevents you from working on the head itself - screw in 11 bolts, and the job is done.

Start of work

The very first step is to remove the air filter. Of course, on a carburetor engine it is somewhat easier to remove it. If you have an injector, you will have to tinker with its rubber fasteners. But the essence remains the same - it is necessary to disassemble the fuel system completely to get to the cylinder head. But we will look at the example of not an injection, but a carburetor seven. Still, there are many more classic cars with such a power system.

It is advisable to dismantle the carburetor, since if you remove the head along with it, you can accidentally damage it. On all classic series cars, the carburetor is removed in the same way. This procedure is quite simple, but it will take some time. Now you can unscrew the nut securing the distributor and remove the distributor along with the wires. Getting closer to the engine, all that’s left to do is drain the antifreeze from the system.

And then turn off all the pipes that you see. After this, it will be possible to dismantle the cylinder head cover. It is secured with nuts and shaped washers. Don't lose them during repairs. That's all, the preparation is complete, you can begin the most difficult part - dismantling and installing the cylinder head.

Tightening on VAZ model 2107

Now it's time for the puff. After installing the head, tighten all the bolts by hand (that is, without a key). Continue until they stop giving in. During the process, make sure that the cylinder head does not move.

Next, tightening is carried out. The work is carried out according to the standard scheme: the two central bolts are tightened first, then those located to the left and right of them, and then the corner ones.

To ensure the correct tightening torque, you should use a special torque wrench. And even then, the procedure is performed in several stages:

for the first time, bring the torque to 4 kgf m;
on the next lap, increase it to 11.5.

Tighten the small (11th) bolt only to 3.8 kgf m.

After completing the installation of the cylinder head, reassemble the engine in the reverse order to that described. Try starting the engine. If everything works, then fill in the coolant.

Which cylinder head gasket is the best?

The sealing gasket serves to strengthen the engine cooling channels and well preserves the oil channels in the cylinders that have the gas distribution function. Therefore, it is not worth saving on the cylinder head gasket. If the part is of poor quality, a breakthrough may occur between the cooling system channel and the drainage channels of the lubrication system. There is a breakthrough located at the junction of the cooling system channel and the cylinder.

By the way, the same thing happens when the cylinder head is loosely tightened, but in any case the gasket will have to be changed.

Automotive stores sell the following types of cylinder head gaskets intended for installation in the VAZ-2107:

Asbestos - involves associated engine repairs. The advantages of the material are heat resistance, increased elasticity, and good elasticity characteristics.
Non-asbestos products are also easy to use, and all thanks to minimal shrinkage and excellent restorative properties.
Metal ones are considered the best among all other cylinder head seals. The point is that the pressure is distributed evenly throughout the block.

A video of how to replace the cylinder head gasket of a VAZ-2107 with your own hands can be seen below: