Expansion tank for VAZ 2110 - selection, replacement and repair

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Every car has an expansion tank. The domestically produced VAZ 2110 model is no exception. This container serves to remove excess heat from your car's engine.

Sometimes it happens that the tank itself or its lid fails. This leads to the need to carry out minor repairs, replace a single element or the entire container assembly. You don't have to be a professional auto mechanic to do your own repairs. You just need to know some nuances.

Expansion tank VAZ 2110 - replacement, repair, installation + Video » AvtoNovator

The expansion tank of the VAZ 2110 car model, with minor differences, can be found in all other cars of this manufacturer. The direct purpose of the container is to remove heat from the car engine. Like any device, it periodically needs repair.

What does the expansion tank look like?

This is a plastic container into which the liquid involved in cooling the engine is poured. In addition to the hoses connected in a closed loop, the tank also has a built-in float sensor, which transmits data on the temperature of the liquid on the instrument panel of the VAZ 2110.

Expansion tank VAZ 2110

In VAZ 2110 and 2114 cars, the expansion tank is located under the hood on the driver's side, behind the car pillar glass. This is not very practical: the tank is clamped on all sides by metal, which prevents it from expanding when the lid does not work properly and it can burst. During the summer this is a very common problem. In other VAZ car models, the location of the tank is chosen more successfully, both for operation and for repairs.

Possible malfunctions - what to prepare for?

Very often, owners of VAZ 2110 are faced with malfunctions of the valve cover of the tank. It relieves excess pressure when the engine overheats. For one reason or another, the lid may jam, resulting in excess pressure being created, up to the explosion of the container. If you encounter such a problem while driving, do not turn off the car engine under any circumstances, just stop and wait until the radiator cooling fan turns off.

Reservoir valve cover malfunction

The expansion tank is directly connected to the car's radiator and its fan, so it is very important to maintain them in good condition. Periodically inspect all engine cooling elements, this should be done especially often in the summer when the outside temperature is very high.

If you see that the coolant level in the reservoir is decreasing, check the system for leaks. The normal operation of the expansion tank is indicated by small drips from the neck cap to the surface of the liquid. This indicates that the reservoir cap valve is operating correctly.

Replacement or repair - a clear choice

Repairing the tank is possible only if it is necessary to replace components - the tank cap or the liquid level float.

The container has lost its seal

Installing and replacing an expansion tank does not require special knowledge and skills. Before purchasing a new expansion tank, be sure to check that it is original. Such parts will serve you much longer.

New expansion tank

If the problem is in the tank cap, then it is best to replace it with the cap from the expansion tank of the VAZ 2199. Judging by the experience of many drivers, the caps from this model are much better, and they also fit perfectly with threaded connections.

Let's start replacing - what to pay attention to?

To install the tank you will need screwdrivers, pliers, new clamps, a set of wrenches and sandpaper. Sandpaper is necessary for processing the inlet holes on the plastic of the tank, which have a rough surface. It is necessary to make it smooth, this contributes to a better fit of the system pipes.

Replacement of the tank must be carried out according to the instructions specified in its new kit. If the car has been running, you need to wait until it cools down. First of all, open the car radiator cap, this will reduce the pressure in the system. You can completely get rid of the coolant by unscrewing the cap at the bottom of the radiator. If you recently changed the fluid, then when removing the old tank you need to clamp its pipes to prevent unnecessary losses.

Replacing the tank

This is followed by installing a new tank and connecting all pipes to it. The clamps must be clamped without using much force so as not to break the inlet holes of the tank. If necessary, add coolant

In a VAZ 2110 car, it is very important to constantly maintain the average fluid level. After completing all the work and checking the remaining pipes of the system, start the car and let it run until it boils.

When the fan on the radiator turns on, watch the reservoir cap - it should release pressure.

Installing a new tank

If the reservoir cap relieves pressure in the system, but you see a low fluid level on the instrument panel, then replace the electronic sensor, which is located in the reservoir. As a rule, it is purchased separately. Its installation is very simple - just disconnect the chip on the cover and unscrew it, insert a new one and repeat the steps in reverse order.

What does he look like?

Externally, the expansion tank is a plastic container. Liquid is poured inside this container, which is directly involved in cooling the engine.

The design of the element includes hoses closed in a circuit, a float sensor built into the lid or plug of the tank. Whichever is more convenient for you. It is this sensor that transmits information about the current coolant temperature. When the permissible values ​​increase, the corresponding warning light lights up on the dashboard.

Complete structure

Where is he located?

To replace a damaged container, you first need to determine where it is located.

The location of the expansion tank is the engine compartment on the driver's side, right behind the pillar glass.

Such an arrangement in the VAZ 2110 certainly cannot be called successful, since there are metal elements on all sides of the plastic tank. Because of this, problems arise with the expansion of the plastic, sometimes the tank simply bursts.

Depressurization of the tank occurs especially often in the summer, when there is intense heat outside. The manufacturer, represented by AvtoVAZ, took this problem into account when developing new models. And the owners of the “ten” have to put up with this arrangement of the tank.

Container location

What is an expansion tank cap

Any driver, even the most inexperienced, knows well why an expansion tank is needed in a car. Coolant is poured into it, and the remaining free volume is designed to compensate for the increase or decrease in the amount of expanded liquid.

Accordingly, the tank is closed with a lid. The cover is installed on the tank neck in the upper part.

Many drivers do not attach much importance to the lid - after all, it is important to simply maintain the tightness of the tank, and what exactly to close it with does not matter

Yes, the expansion tank cap is a locking element. However, contrary to popular belief, the lid has a complex structure and performs special functions.

The cover cavity includes a rubber seal and a double valve mechanism

What does the element consist of?

The lid has two valves. They are designed to protect the cooling system from possible damage due to overheating, in addition, these valves stabilize the operation of the entire system.

The two valves are plugs for two closing springs. The lid must fit tightly (without gaps) to the edges of the tank. To ensure a reliable connection, the lid includes a rubber seal. There are two valves built inside:

• the first relieves excess pressure in the tank;
• the second pumps the necessary pressure into the tank if the pump for some reason does not cope with its job.

These valves got their names due to the use of high or low pressure: on VAZs the first valve is called a safety valve, and the second is called a vacuum valve. However, both are at rest as long as the pressure in the tank is within the specified reading range.

The valve mechanisms of the lids on VAZs are springs

Symptoms of a faulty expansion tank cap

Owners of Russian-made cars know how important it is to monitor the condition of all systems in the car’s design. Even such a small element as the cap of an expansion tank can cause a lot of trouble - for example, if the valve mechanisms fail, the operation of the entire cooling system can be disrupted

As a result, the engine overheats and the cylinders jam. In this case, the driver will face expensive repairs.

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Therefore, in order to prevent unpleasant consequences, you need to carefully monitor some features in the car’s behavior while driving:

• Puffs of smoke appear from under the hood - therefore, coolant has hit the hot surface of the intake manifold. Antifreeze could get onto the manifold for only one reason - the safety valve on the cover had failed;
• Cool air comes out of the stove, and the engine gets very hot: this is a sign of failure of the vacuum valve of the cover. Due to malfunctions in its operation, air plugs occur in the cooling system, which leads to overheating of the engine;
• failures of clamps and ruptures of hoses also indicate that the pressure in the system is unstable. And since it is the expansion tank cap that is responsible for the pressure, these symptoms indicate that it is time to replace or repair it.

If plumes of smoke are escaping from under the hood, this may indicate a faulty expansion tank cap.

Possible faults

Often, drivers who have a VAZ 2110 are faced with malfunctions of the tank valve cover: when the engine overheats, it automatically opens. For certain reasons, the lid may not move in any direction, which causes excess pressure and the container may burst or even explode. If a similar situation occurs while driving, do not turn off the car engine; you need to stop and wait for the fan cooling the radiator to turn off.

Valve cover damage

The expansion tank 2110 is directly connected to the fan and radiator, as a result of which their condition must be monitored. Parts that cool the engine should be inspected regularly. In summer, keep an eye on this constantly, as the air temperature is relatively high. If you notice that the amount of antifreeze inside the container begins to decrease, find out whether the entire system is tight. If there are small drips from the neck of the tank to the surface of the liquid, this means that it is working properly. That is, the lid valve is working properly.

Possible problems

In fact, ruptures of plastic containers do not occur so often, so you should not be alarmed in advance when purchasing a used VAZ 2110.

Much more often, owners of this domestic car are faced with a breakdown of the valve cover of the tank. It is responsible for relieving excess pressure when the power unit overheats.

It is this lid that can jam, causing pressure to build up inside the container, which can ultimately lead to rupture of the plastic.

If such a problem catches you on the road, do not turn off the engine under any circumstances. You need to stop and wait for the cooling fan to turn on.

Preventive measures

As you understand, the expansion tank is directly connected to the radiator and fan, therefore maintaining the tank in working condition is the direct responsibility of every car owner.

Prevention includes the following activities:

• Periodically inspect the condition of the plastic container and its individual elements;
• If you find that the coolant level in the tank is too low, add the missing amount;
• If it soon becomes noticeably smaller again, check the tank for leaks. Most likely, liquid is leaking somewhere;
• Observe the condition of the tank neck. If there are traces of drips on it, that's good. This phenomenon indicates that the valve cover is triggered and relieves excess pressure. Hence the traces of coolant.

Identification of buttons

It is also important to know the designation of the buttons on the VAZ 2114 panel. On the instrument cluster on the right side there is a button (11), with which the time and temperature on the digital indicator are switched, and when pressed for 5 seconds or more, the current mileage is reset, if pressed this button on a stationary car.

In the central part of the dashboard are located in a row:

Double headlight switch. Button 1 turns on the dimensions, button 2 turns on the low beam;

Key switch block. The first 1 turns on the front fog lights, the second 2 turns on the rear fog lights and the third 3 turns on the heated rear window.

This shit lights up. But the antifreeze level is normal. The sensor is new!

Coolant replacement

According to the manufacturer's recommendation, the coolant should be replaced after two years of operation or after 60 thousand kilometers, whichever comes first. In addition, if the coolant changes color to a reddish color, replace it immediately, as such a change indicates that inhibitory additives have developed and the liquid has become aggressive towards the parts of the cooling system.

You will need: a “13” key, coolant, a clean rag, a container for drained coolant with a capacity of at least 10 liters.

After a few days of using the car after replacing the coolant, check its level. If necessary, add coolant.

If, after a very short time, fresh antifreeze changes color from blue to brown, it means that you filled it with a fake, to which the manufacturers “forgot” to add corrosion inhibitors. In addition, one of the signs of a fake is the sudden complete discoloration of antifreeze. The dye of high-quality antifreeze is very stable and only darkens over time. Antifreeze tinted with linen blue becomes discolored. This “antifreeze” needs to be replaced quickly.

Causes of failure of VAZ 2110-2115 tanks

The service life of this element is not limited by regulations. This means that the container should be changed as needed, and this occurs quite often. The most common reason for replacement is damage to the integrity of the plastic case during operation. The tank simply bursts and here's why:

1. Clogged or damaged lid valve.
   The steam coming from the radiators increases the pressure inside the tank because it cannot escape through the plug. As a result, the wall of the container is destroyed. Damage to the plastic wall occurs due to excess pressure in the cooling system
2. In VAZ 2110-12 cars, the side walls of the vessel are closely adjacent to the body elements - the glass and the partition. As the antifreeze temperature and pressure in the system increase, the plastic has nowhere to swell, causing the body to burst along the seam at the end (usually in the lower corner).
3. In the event of a breakdown of the gasket between the cylinder head and the engine block, the cooling system is subjected to a series of water hammers created by the movement of the pistons. The plastic case also often bursts from such an impact.
4. The reason may be the expansion tank itself, made from low-quality raw materials or in violation of plastic molding technology.
   On low-quality products, cracks may appear 3-6 months after the start of use.

To avoid destruction of the expansion tank, it is recommended to check the functionality of the plug valve before each long trip. Practice shows that problems with the tank most often arise on the road, when it is hot outside, that is, in the summer. A sign of a malfunction is a sharp increase in coolant temperature and a puddle under the engine compartment on the driver’s side.

Standard pipes with union connector

If such hoses are present, dismantling them is carried out as follows:

• Elements of this type are usually mounted using clamps. Just check what kind of clamps they are - disposable twist type or standard worm clamps. If they are disposable, we highly recommend replacing them with worm driven items. They are more practical and reliable;
• Armed with a screwdriver, loosen the clamp slightly and move it along the pipe. This way you can completely release the fitting;
• The hose is carefully, without unnecessary or sudden movements, removed from the receiver, that is, the fitting. Quite new pipes that have not yet worn out are easy to remove, but old ones can “stick”;
• If the element does not want to be removed just like that, twist it on the receiver, pry it with some sharp object, and pull it. You just can’t put in a lot of effort, because the pipes are very fragile. If the situation is really sad, just cut the hose with a knife. It is simpler, easier, although it will require large financial costs;
• When installing new hoses, clamps are first put on and then pulled onto the cooling system receivers;
• If you previously used a twist-type clamp, be sure to remove it. As an alternative, both a screw clamp and a worm clamp are suitable. There is no big difference in price, but the level of reliability is significantly higher;
• If you have difficulty fitting the elastic pipe onto the fitting, slightly wet the latter with soapy water. Another option is to warm the ends of the hoses in warm water;
• To facilitate installation, never use lubricants containing oils;
• Pull the ends of the hoses onto the fitting, check the correct installation and laying in the engine compartment;
• Now move the clamp to the required position and tighten, thereby ensuring a strong fastening of the new element of the cooling system;
• Follow the procedure to fill the system with coolant;
• Turn on the power unit and watch for signs of coolant leakage. It is quite possible that the clamp was not tensioned tightly enough, or there is a defect on the pipe itself. Although such things should be checked before purchasing.

Coolant boiling

If antifreeze (antifreeze) boils, make sure:

1. Does the radiator fan work and when does it turn on? The sensor may be faulty;
2. Is the thermostat working? The coolant constantly moves in a small circle, thereby not cooling;
3. Is the pump working?
4. Is the cooling system, including the radiator, clogged?
5. Is the system airy?
6. Is the valve on the lid working properly? Low pressure in the system can cause premature boiling of the antifreeze.

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As for airiness, for example, in VAZ 2110, 2111, 2112, from the experience of their operation, the system practically does not become airborne due to its special design.

In other cars, when replacing the coolant, an air lock may end up in the stove and, over time, make itself felt by overheating the engine and burning out the cylinder head gasket

It is important to monitor the instrument readings

Heater heat exchanger hoses

The other hoses in the VAZ 2110 cooling system are those connected to the heat exchanger of the heater.

, the O-rings must be replaced . Therefore, we advise you to purchase them in advance. The dismantling procedure itself is as follows.

1. Two heater hoses are connected to the heat exchanger using a single connector. Some modifications of the VAZ 2110 may require dismantling the camshaft cover.
2. Remove the metal clip that is located on top of the connector.
3. Push the plastic tab towards the left side of the connector to release it.
4. Remove the heat exchanger connector, remove the old O-rings. It is strongly not recommended to return the same ones to their place.
5. An alternative to such connectors can be hoses with a spring clamp made of metal.

What to choose?

If you still need to replace the tank, you first need to choose what exactly you will replace the old tank with.

Today there are several decent options on the market that are perfect for your VAZ 2110.

If you choose to replace the tank from Priora, then you should take the version for a car without air conditioning.

Replacing the expansion tank on a Priora

Introduction

The expansion tank in a car is one of the most important elements of the engine cooling system (ECS). This element is made from special, temperature-resistant plastic and, oddly enough, is quite reliable. However, there are times when it fails.

In the event of such a breakdown, every car owner should know the procedure for localizing it. Its cost is relatively small and starts from 200 rubles. In this article you will find all the answers to your questions about the Priora expansion tank.

Why do you need an expander?

To cool the engine, a special liquid based on propylene glycol or ethylene glycol (antifreeze or antifreeze) is used. These types of coolant have large thermal expansions. When the internal combustion engine operates, the coolant heats up and expands. If the cooling system did not use an expansion tank, then due to thermal expansion the radiators or pipes would fail due to excess pressure.

The liquid in the expansion tank increases when heated and decreases when cooled. To prevent excessive pressure or vacuum from forming in the tank due to constant changes in coolant level, its lid is equipped with special valves that release or, on the contrary, allow air into the system in order to compensate for the load on the tank and maintain normal operating pressure.

Tank location

In Priora, the expansion tank is located under the hood on the left side in the direction of travel of the car, between the side member and the windshield. It has a rectangular shape with three or two fittings for SOD pipes.

With two fittings it is used in Prioras with climate control (air conditioning).

With three fittings in Priors without air conditioning.

Inside there are several partitions to strengthen the structure, which can withstand heavy loads.

The coolant level must be indicated on the tank, which should always be between the MIN and MAX marks.

About the cover

Special attention should be paid to the expander cover. At first glance, the lid does not have anything special, but if you look closely, you will notice that it has an unusual bottom.

It contains two valves that operate under specific conditions. As described above, one of the valves releases excess pressure when the engine is hot, and the second, on the contrary, lets air in when the engine cools down.

The serviceability of the cap is the key to the correct operation of the SOD and the integrity of the expansion tank.

Tank failures and their causes

The main damage to the expander is cracks or abrasions. Quite often, cracks in the tank form near the fittings, and abrasions appear on the lower part. This occurs due to engine vibrations in the engine compartment due to uneven roads.

Sometimes it happens that the expander bursts due to excess pressure in the system; this will be caused by a faulty cap, or rather its valve, which did not release the pressure at the right time.

If one of these problems is detected, the expansion tank must be replaced.

Replacement

To carry out the work, you do not need any special knowledge of automotive mechanics; after reading our instructions, you will easily carry out this work. For faster and trouble-free dismantling and installation of the tank, you need to prepare the necessary tools. It is also recommended to replace the cap along with the tank.

Tool for work:

• Crosshead screwdriver;
• Sealant;
• Container for draining the coolant (a two-liter bottle with the neck cut off will do);

Work procedure

It is necessary to allow the engine to cool down to avoid burns during operation.

Unscrew the clamp of the lower fitting and drain the coolant into a prepared container. It is necessary to drain the liquid only from the expander. Then we fix the removed pipe in a vertical position so that the remaining coolant does not leak out.

We unscrew the clamps of the remaining pipes and remove them, also fixing them in a vertical position.

We remove the tank by pressing on the right side and pulling the left up, it should look like in the picture.

Install the new one in the reverse order of removal. It is recommended to apply a small amount of sealant to the fittings for better tightness of the system.

We add the remaining coolant, start the engine and warm it up to 90°C, after which we check the tightness of the system.

The process of replacing the expansion tank on the Lada Priora has been completed, as you can see there is nothing complicated about it.

Recommendations for selection

For VAZ 2110-12 models, you can find 2 types of expansion tanks on sale:

old model with two necks: the coolant level sensor is screwed into the first, and the second is closed with a plug with a release valve;

On old-style products, a second neck was made for installing an antifreeze level sensor

The new sample container does not have a level sensor

If your car has a sensor in an expansion tank, then you need to select an old-style product. Accordingly, versions without a sensor will require a new reservoir design.

For VAZ 2114-15 models, tanks of the same shape are offered with 3 fittings: two of them are located at one end, and the third is located at the opposite end. Products for the VAZ 2110 and 2114 are not interchangeable with each other, although if you really want to, attaching a part from another model is quite possible. Another thing is that there is no need for this - both varieties are available for free sale and practically do not differ in price.

The reservoir for models 2114-15 has a wider shape and a versatile arrangement of fittings

When purchasing an expansion tank for any series of cars of the “tenth” family, pay attention to the following points:

• the plastic of a quality product should be light and half transparent;
• cracks in the corners or near the fittings are unacceptable;
• the plastic should not be “oaky” or have dark impurities visible to the naked eye;
• look on the body for an imprint of the manufacturer's trademark and catalog number (21083–1311014 for VAZ 2114).

For all modifications “ten”, “fourteen” and “fifteen” a small tuning is available - installation of an expansion tank from the cooling system of a Lada Priora car. Why and how this is implemented will be discussed below.

The reservoir of the Priora cooling system has a rectangular shape and 3 fittings on the front wall

Video: how to distinguish an original spare part

Internet auto club IZH-2126

Required parts and materials:

• New type expansion tank VAZ-2110;
• Branch pipe of the expansion tank VAZ-2110;
• Vapor removal tube for expansion tank VAZ-2110 2 pcs.
• VAZ-2110 expansion tank belt;

Additionally, who wants to install an alternative sensor on. fan:Original numbers: AUDI / VOLKSWAGEN 811 959 481AUDI / VOLKSWAGEN 893 959 481

Installation.

First, remove the old (original) tank and mark on the bracket the places where the screws for the bracket will be screwed in. We make markings at the intersection of the middle of the bracket (the intersection of vertical and horizontal lines).

Rice. 1. Bracket for the tank and places where the screws are screwed in.

Next you need to drain the coolant, because... Next we need to remove the upper (supply) radiator hose to the cylinder head pipe.

Rice. 2. Upper (supply) radiator hose, cylinder head pipe.

After the liquid has been drained, you need to make a short hose of the same cross-section with a bend (you can buy a similar hose and cut it off). Rice. 3. A piece of rubber pipe.

Next, we will need a 3/4 3/4 1/2 tee, as well as a suitable fitting with a diameter of “10” mm.

Rice. 4. Tee 3/4 3/4 1/2 and fitting with a diameter of “10” mm.

We insert the tee into the hoses and crimp it with suitable clamps, as shown in Fig. 3.

Now we make a bracket for the expansion tank. To do this, you can take metal plates (thin) with a width of 2.5 - 3 cm and 10 - 15 cm, the length can be taken with a margin of 30 - 40 cm, I cut them with metal scissors by eye. We take a pre-purchased VAZ-2110 tank and wrap it with a metal plate that is less wide so that it follows the contours of the tank. Next, mark on the plate the places where the screws will be screwed in. We take a wide plate and screw it to a narrow plate as shown in Fig. 1. We wrap the tank with a wide plate similar to the narrow one. Then we cut the plates in place, so that the rubber crimping belt of the VAZ-2110 can be pulled onto the tank with force and press the thick plate.

We twist one end of the narrow plate around the retaining ring of the crimp belt and clamp the ring.

Rice. 6. Crimping the ring of the crimping belt of the VAZ 2110 tank.

At the other end of the narrow plate, drill a hole with a diameter of 10 mm and bend it slightly away from the tank.

Rice. 7. View of the finished bracket.

Now we take the finished bracket and use a hammer to hit the heads of the screws to make holes at the previously marked points on the bracket of the old tank. This method is the most appropriate, since it is impossible to get to the bracket with a drill and drill bit. We screw the bracket (the screws will screw in with great effort). We replace the hose going from the engine to the old expansion tank with a hose from a VAZ-2110.

We insert the tank into the bracket and tighten the crimping belt. We insert the hose going to the expansion tank and tighten it at the ends with clamps. We will also need steam removal hoses for the expansion tank of the VAZ-2110 - 2 pcs. We put one hose on the tee fitting, the other on the radiator fitting. We cut the hoses to the required length in place.

Rice. 8. Vapor removal hoses and expansion tank pipe of VAZ-2110.

If the steam removal hoses are simply put on the tank fittings, then the problem of coolant leakage through the tank cap arises, because the pressure of the coolant hits the lid directly. To fix the problem, we will need a disassembled antenna from the radio receiver and an empty tube from the gel pen paste. From the disassembled antenna, we will need a tube of small diameter (about the same as that of a gel pen paste), and the length should be approximately 15 - 17 cm. We expand the holes in the tank fittings with a drill with a diameter comparable to the diameter of the tubes we prepared. We insert the tubes in this way - into the upper fitting of the tank we insert a tube from a gel pen, to it we attach a steam removal hose coming from the radiator, into the lower fitting we insert a tube from the antenna, and we attach the hose coming from the tee. If the coolant pressure inside the tank still reaches the lid, you can bend the tubes inserted into the fittings inside the tank.

VAZ 2112 replacing antifreeze - subtleties of the process

If you buy a car, put it in a cupboard and admire it, then you definitely won’t need to replace any working fluids. And since a normal car is constantly in use, it requires maintenance. One of the types of work that needs to be done is replacing antifreeze or antifreeze - in a word, coolant. Cooling system design

This article provides instructions on how to replace antifreeze in a VAZ 2112 yourself

Here you will find some features that are important to pay attention to when replacing the coolant, a video on the replacement and a detailed description of the process itself

Preparation

It is necessary to remove the pipes only when the car engine has completely cooled down. Therefore, if you have just stopped by your garage for procedures, do not rush. It is better to leave the car overnight and return to work tomorrow morning.

1. Make sure that the pipes are actually damaged and need to be replaced.
2. Be sure to drain the coolant from the system. If you recently changed it, there is no need to dispose of the liquid. Just use a clean container to drain so you can refill it later.
3. The order in which you perform the work depends on what hoses are used on your vehicle.

Possible problems

In fact, ruptures of plastic containers do not occur so often, so you should not be alarmed in advance when purchasing a used VAZ 2110.

Much more often, owners of this domestic car are faced with a breakdown of the valve cover of the tank. It is responsible for relieving excess pressure when the power unit overheats.

It is this lid that can jam, causing pressure to build up inside the container, which can ultimately lead to rupture of the plastic.

If such a problem catches you on the road, do not turn off the engine under any circumstances. You need to stop and wait for the cooling fan to turn on.

Preventive measures

As you understand, the expansion tank is directly connected to the radiator and fan, therefore maintaining the tank in working condition is the direct responsibility of every car owner.

Prevention includes the following activities:

• Periodically inspect the condition of the plastic container and its individual elements;
• If you find that the coolant level in the tank is too low, add the missing amount;
• If it soon becomes noticeably smaller again, check the tank for leaks. Most likely, liquid is leaking somewhere;
• Observe the condition of the tank neck. If there are traces of drips on it, that's good. This phenomenon indicates that the valve cover is triggered and relieves excess pressure. Hence the traces of coolant.

Let's look at each of them

The problem may arise with the valve plug - the cover may simply jam. Since its main purpose is to remove steam, if the lid breaks, excess pressure occurs inside the tank. This situation is quite capable of leading to the tank simply bursting. It is important to remember that if the cover jams while driving, do not turn off the car engine. Stop driving and wait for the cooling fan to start operating.

Another problem may be simple wear of the neck thread, which in most cases leads to either the inability to tighten the lid or a leak in the seal. Of course, you can temporarily use a seal, but it is still more advisable to completely replace the entire expansion tank.

A malfunction of the expansion tank may also be detected, such as a leaky connection between the pipe and the tank. This problem can be solved by using a special sealant.

Well, and finally, the most “conspicuous” problem is the actual damage to the tank itself. It doesn’t matter what caused this problem: manufacturer’s defects, natural wear and tear of the material, or rupture as a result of increased pressure, in any case, only purchasing a new expansion tank can correct the situation. On the Internet you can find advice on gluing or sealing a vessel, but it is hardly advisable to do so, because the price of the part is not so high.