It became cold in the car, multitronics showed the coolant temperature, which did not exceed 80 grams even with a fully closed visor and under load.

The verdict is the following, replacement of the thermostat. I ordered the Vernet TH6047.89J thermostat in the online store for 424 rubles. They said to wait a week and a half, but it is cold in the car, in short, I took what was available at the local store (exactly 400 rubles). Vernet will be in reserve:

For one thing, I decided to change the antifreeze, the car in a month 3 years. I chose this:

I took 6 liters, one liter will remain for refilling.
Since my garage is currently occupied by my son's car and it is disassembled, I decided to change it after working on the street. The weather is still a little tolerated, it is -23 on the street, but a decent cooling is promised ahead.

He took his son to help himself, because you are not!
I just want to apologize for the quality of the photos and therefore some are not mine, but are taken from the network.
To begin with, I warmed up the engine without fanaticism so that my hands would not stick to the metal. To carry out all the replacement procedures, it was necessary to remove the battery for more convenient access to the lower radiator pipe, as well as the air duct and receiver of the air filter.

The coolant was drained in a barbaric way, without removing the engine protection. To do this, we bleed off excess pressure in the cooling system by slightly opening the expansion tank cap until the valve is triggered. We twist the lid and remove the clamp from the lower branch pipe of the cooling radiator and the branch pipe itself from the fitting:

We are waiting for the liquid to drain, for speed we open the cover of the expansion tank and the blowdown nozzle:

When the liquid has stopped running out, you can blow into the expansion tank in any way possible, this will displace some more amount of liquid. I did it with a piece of hose of a suitable diameter and my lungs!
Next, you have to remove the thermostat, for this you need to unscrew the three mounting bolts:

If you have a normal tool, difficulties should not arise. I unscrewed it with a small ratchet with an extension and an 8mm head.
When removing the thermostat, some more liquid will flow out. After that, you can still blow into the tank, a little more liquid will come out.
Further, on the advice of one of the local and old logonovods, I threw off the pipes from the thermostat body (cover) and dismantled it:

After that, on a fine sandpaper and a flat surface, I ground (processed) the body flange until it evenly adheres to the surface. There were irregularities on the flange and the surface was not perfectly flat, which could contribute to an uneven crimping of the O-ring of the new thermostat.

We assemble in the reverse order. We tighten the fasteners evenly, it is unnecessary to tighten. If I am not mistaken, the effort should be 10 kg.
After installing a new thermostat, we start installing the pipes, it is advisable to change the clamps. I put the usual:

When the entire system is sealed, we begin pouring fresh antifreeze through the expansion tank, while the cap from the relief fitting must be removed. After the liquid has ceased to leave the tank, and antifreeze has flowed from the discharge fitting in an even stream without air, we close both covers.
Next, we put in place the battery, air ducts of the air filter and start the car to warm up. As the antifreeze in the expansion tank decreases, add liquid by muffling the machine and bleed air through the vent fitting. I did this operation four times, the coolant temperature was controlled through Multronics. Since the car did not warm up well in the cold, even though I was "gasping" and the thermostat did not want to open the large ring, I had to ride it for several kilometers, controlling the temperature and periodically the level of liquid in the tank. As a result, it was possible to fill in a full 5 liters of antifreeze. According to Multitronics, now the full opening occurs at 93 grams, but perhaps this is just energy.
The main thing in the car became warm again, which was required to prove!

During the operation of the internal combustion engine, a significant amount of heat is released, which requires its removal, which means that a reliable cooling system is needed. In Lada Largus, heat is removed thanks to the circulation of antifreeze. The service life and efficiency of the engine depend on its quality. Therefore, it is necessary to change it in a timely manner. Even a novice motorist can cope with replacing the coolant with Lada Largus, using step-by-step instructions for the procedure.

[Hide]

Antifreeze use and reasons for replacing it

Many motorists do not understand the meaning of antifreeze, believing that plain water from the mains can cope with cooling. The difference lies in the complex chemical composition of the refrigerant. During operation, the engine heats up to high temperatures, the task of antifreeze is to remove excess heat and maintain the operating temperature of the engine - about 90 degrees.

Ordinary water is not suitable for these purposes, since at a temperature of 100 degrees it begins to boil and evaporate. In this case, to maintain the system at the required fluid level, frequent topping up of water will be required, which creates inconvenience during operation. In addition, the water contains various impurities that settle on the walls and internal parts of the power unit, radiator and highways. This can disrupt the correct heat exchange, which threatens overheating of the engine.

Antifreeze is used as a refrigerant for Lada Largus. To prevent the engine from overheating during operation of the car, the cooling system must be in good condition and high-quality refrigerant is filled. Otherwise, the rubbing parts of the power unit will not cool in time, which will lead to overheating and failure. Overhaul takes a lot of time, effort and is expensive. Therefore, the condition of the cooling system and the refrigerant must be monitored.

In the manual of the Lada Largus car, the manufacturer requires a routine replacement of the coolant (coolant) after 35-45 thousand kilometers or after two years of operation. The timing depends on which event comes first.

The following factors affect the frequency of coolant replacement:

• quality of antifreeze;
• chemical composition;
• operational characteristics;
• manufacturer.

The latter set their own terms for the released product. On average, manufacturers recommend changing the coolant once a year. The replacement frequency also depends on the operating conditions, the technical condition of the car, and the driver's driving style. Therefore, mileage does not play a major role. The serviceability of the cooling system and the quality of antifreeze are also important. This is especially true of Lada Largus, since an aluminum radiator is installed there.

You can decide on the need to replace the coolant by determining its quality. In a garage, you can use the following methods:

How to choose the right antifreeze

High quality refrigerant is able to maintain its characteristics for a long period of time, regardless of the conditions in which the machine is used. There are brands of antifreeze, the manufacturer of which promises that replacement will be required only after 100 thousand kilometers. Naturally, they are more expensive than conventional coolants.

It is important to choose the right refrigerant, which will extend the life of the motor and components of the cooling system. Manufacturers recommend using GLACOEL RX class D antifreeze for Lada Largus.

Ethylene glycol is used as a base in this refrigerant. Distilled water is added to it in the right proportion and special additives are added. Analogs can be used.

Antifreezes are divided into mineral G-11 and organic G-12. The first is used in used cars, the second is used in modern new cars. Antifreezes differ in the color of the liquid. The color determines the set of properties inherent in a given refrigerant. It is not recommended to mix liquids of different colors, as such a mixture can harm the cooling system. Therefore, you need to buy coolant of the same color that was filled.

Change the liquid yourself: step by step instructions

To replace, at least 6 liters of antifreeze will be required, since 5.45 liters of coolant is placed in the cooling system of a Lada Largus car. Experienced drivers recommend keeping antifreeze in stock, poured into the system for unforeseen situations that may arise on the road: fluid leakage due to depressurization of system components.

Work must be carried out on a cold engine. If the car is after a trip, you need to wait until the engine has completely cooled down.

Draining and pouring antifreeze on Lada Lagrus consists of a sequence of actions:

• We install the car on a lift or a flat observation deck. We fix the wheels to avoid rolling back.
• Raise the hood to access the engine compartment. We de-energize the car by removing the negative terminal from the battery.
• We unscrew the cap from the expansion tank to relieve excess pressure. For safety reasons, you need to work with gloves. Steam may escape from under the cover if the motor is not sufficiently cooled.
• Go to the underside of the car and dismantle the engine protection, if installed.

• We install a container with a volume of at least 6 liters under the radiator nozzle to drain the old coolant. The design of Lada Largus does not provide for a drain hole with a plug, so the coolant will have to be drained by loosening the clamps on the lower radiator pipe.
• Using sliding pliers, we squeeze the ends of the clamps that hold the hose to the radiator pipe.

• We move the clamp and remove the hose from the pipe. Care must be taken not to splash with refrigerant.
• The intensity of the drain is regulated by the cover on the expansion tank. If it is swirling, the liquid flows more slowly, if it is not there, then the antifreeze flows out faster. First, the cap should be tightly screwed on so that the antifreeze does not suddenly spill out of the hose. Then we unscrew it as the liquid flows down.

• Additionally, you can remove the cap from the fitting located on the hose supplying antifreeze to the heater.

• When the antifreeze is completely drained, we rinse the system with cold water, pouring it into the expansion tank. We carry out flushing until clean water flows from the hose.
• After flushing the system, return the hose to its place and secure it with a clamp.
• Pour new antifreeze through the expansion tank until it flows out of the air outlet in a stream.

• There should be no air bubbles in the flowing liquid, otherwise the cooling system will not work effectively.
• We return the union cap to its original place. Top up the coolant tank to the maximum level and tighten the lid.
• In order to finally remove the air from their cooling system, if it gets there, we start the power unit and periodically increase the number of revolutions per minute to 2.5-3 thousand. After the engine warms up, when the heating is turned on, hot air should go.
• We turn off the engine, wait until it cools down and check the system for leaks. We eliminate the detected leaks. This is the final step in the replacement procedure.

For the efficient operation of the cooling system, it is necessary to monitor its technical condition and the quality of antifreeze. Carry out repairs and change the coolant on time according to the instructions, especially since replacing antifreeze on a Lada Largus car is a simple procedure.

Replacing antifreeze with Renault Logan, Sandero, Duster, Largus.

Features of the device

Pressurized closed cooling system. There is a safety valve in the expansion tank cap. The engine cooling system includes a passenger compartment heating radiator, which is located under the dashboard.

Engine cooling system filling volume:

K4M and K7M (equipped with air conditioning) - 5.45 liters;

K4M and K7M (equipment without air conditioning) - 4.5 liters.

The temperature of the beginning of the opening of the thermostat valve is 89 ° C.

The temperature of full opening of the thermostat valve is 99 ± 2 ° С.

The calibration value of the valve in the expansion tank plug is 1.4 bar.

1.6 (16V)

1.6 (8v)

1 - engine;
2 - water pump;
3 - thermostat;
4 - fitting for air removal;
5 - heater radiator;
6 - radiator of the engine cooling system;
7 - expansion tank

PURPOSE AND OPERATING PRINCIPLE OF THE COOLING SYSTEM

The efficiency of the cooling system depends on its design and operating conditions. The design of the cooling system is determined by the engine power, the size of the cooling radiator, the type of coolant used and the power of the water pump (coolant circulation pump), the type of fan, thermostat and system pressure. Unfortunately, the cooling system is usually overlooked until problems arise. Proper routine maintenance can prevent these problems from occurring.

The cooling system should allow the engine to warm up to the required operating temperature as quickly as possible and then maintain that temperature. It should operate effectively over an ambient temperature range of -30 ° F (-35 ° C) to 110 ° F (45 ° C).

The maximum temperature during combustion of the working mixture in the engine periodically takes off to a level in the range from 4000 ° F to 6000 ° F (from 2200 ° C to 3000 ° C). The average temperature in the combustion chamber ranges from 1200 ° F to 1700 ° F (650 ° C to 925 ° C). Prolonged heating to such high temperatures would reduce the strength of the engine parts, so heat must be removed from the engine. The cooling system maintains the temperature of the walls of the combustion chamber in the temperature range that ensures maximum engine efficiency (Fig. 7.1).

Figure: 7.1. Typical combustion temperature and typical exhaust gas temperature in the exhaust port

PROBLEMS ARISING IN THE ENGINE AT LOW OPERATING TEMPERATURES

In order for the engine to work in normal mode, its operating temperature must be above some minimum acceptable level. If the operating temperature is too low, there is not enough heat for normal fuel vaporization, which is required to obtain the required air-fuel mixture. As a result, it is necessary to increase the fuel consumption in order to create a concentration of its vapors, which ensures the flammability of the working mixture. The heavier, less volatile gasoline components do not evaporate and remain as unburned liquid fuel. In addition to this, a part of the working mixture, in contact with the cold walls of the engine, cools, which leads to incomplete combustion of fuel and the formation of carbon deposits.

Gasoline combustion is a violent oxidative process, which is a chemical reaction of hydrocarbon fuel combining with oxygen in the air. This reaction takes place with the release of heat. When five liters of fuel are burned, one liter of water is formed in the form of vapor. Some of this moisture condenses and enters the oil pan along with unburned fuel and soot, resulting in sludge deposits. The condensed moisture reacts with unburned hydrocarbons and additives, resulting in the formation of acids: carbonic, sulfuric, nitric, hydrobromic and hydrochloric acids. These acids are responsible for engine wear caused by internal corrosion and rusting. When the coolant temperature drops below 130 ° F (55 ° C), rust appears immediately. At temperatures below 110 ° F (45 ° C), water from the combustion process accumulates in the oil. When the coolant temperature is below 165 ° F (65 ° C), the cylinder walls wear rapidly.

To mitigate negative processes in the engine associated with low temperatures and to facilitate engine start-up in cold weather, most manufacturers offer cylinder block heaters as additional engine equipment. These heaters are connected to a conventional electrical network (AC 110 V) and the heating element heats the coolant (Fig. 7.2).

Figure: 7.2. In order to remove the heating element, it is necessary to unscrew the screw that secures it in the technological hole in the wall of the cylinder block (a). The heating element is removed from the cylinder block. The coolant, heated by a heating element immersed in it, expands and, rising upward, displaces the cold coolant. Due to convective heat exchange, the coolant is heated throughout the engine (b)

PROBLEMS ARISING IN THE ENGINE AT HIGH OPERATING TEMPERATURES

To protect the motor from overheating, its operating temperature must not exceed the maximum permissible temperature. High temperatures cause oil to oxidize. Under their action, the oil dissociates with the formation of coke and drying oils. With prolonged overheating, coke is deposited on the piston rings, clogging them. The varnish will seize the plungers of the hydraulic valve lifters. High temperature heating inevitably leads to a decrease in oil viscosity and a decrease in the thickness of the lubricant layer. If the lubricant becomes too thin, dry contact occurs between the surfaces of moving parts. In this case, the coefficient of friction increases, which causes a decrease in engine power and accelerated wear of its components.

Engine overheating is expensive

Failure of the cooling system is the main cause of engine failure. Auto mechanics often have nightmares - they dream about how they put a newly repaired engine in a car with a clogged radiator in a service center. After a bulkhead or engine repair, as a rule, a mandatory replacement of the water pump and all hoses is performed. Whenever the engine is repaired or replaced, the radiator should also be checked for leaks and clogging. Overheating is the most common cause of engine failure.

COOLING SYSTEM DESIGN

The coolant flows through the engine, absorbing the heat generated in the engine. It then flows into the radiator, which dissipates heat to the environment. Coolant circulates continuously through the cooling system as shown in fig. 7.3 and 7.4. As it passes through the engine, the coolant heats up as much as 15 ° F (8 ° C). Then passing through the radiator, it cools down. Coolant pumping speed can be up to 4 liters per minute per horsepower generated by the engine.

Figure: 7.3. The scheme of movement of the flow of coolant through the engine

Figure: 7.4.The photograph of this block of cylinders, from which the plate was cut, shows the channels of the cooling system surrounding the cylinders. Please note that the coolant washes the cylinders from all sides and also flows between them.

Engine temperature and exhaust toxicity.

In many areas, vehicle emissions are monitored. Hydrocarbon Emissions (HC) are simply unburned fuel. In order to reduce the emission of unburned hydrocarbons and successfully pass the emission test, ensure that the engine is warmed up to normal operating temperature before passing the test. Car manufacturers define the achievement of "normal operating temperature" by the following criteria:

1. The upper radiator hose becomes hot and pressurized.

2. The electric fan (s) of the cooling system turns on and off twice.

Ensure that the engine is warmed up to normal operating temperature prior to testing for emissions. It is best to drive the car for 20 miles (32 km) - then the catalytic converter, oil, and also coolant will warm up to normal operating temperature. It is especially important to take care of this in cold weather. Most drivers believe that to warm up the engine, it is enough to let it idle until warm air comes out of the interior heater. The interior heater removes heat from the coolant. Car manufacturers recommend not to allow the engine to idle for more than 5 minutes, and to warm up the engine, let it idle for one or two minutes, after which, for further warming up, you must drive the car slowly to raise the oil pressure in the lubrication system.

Hot the coolant flows through the thermostat valve located at the highest point of the engine to the radiator. The outlet of the cooling system is connected to the upper inlet of the radiator with a hose, which is fixed with clamps. The coolant is cooled in the radiator by the flow of air blowing over it. Cooling down, it goes down the radiator and through the lower outlet pipe enters the water pump, which provides forced circulation of the coolant in the engine.

NOTE

In a number of new engine designs, a thermostat is installed at the inlet of the water pump. When cooled liquid enters the thermostat, it closes and remains closed until the coolant temperature reaches its opening temperature. Thus, placing a thermostat at the water pump inlet reduces the range of coolant temperature fluctuations, mitigating sudden temperature changes that could lead to thermal stresses in the engine, especially in engines with an aluminum cylinder head and cast iron block.

The efficiency of heat dissipation by the cooling system is mainly determined by the efficiency of the radiator. Radiator designs are designed to maximize heat transfer efficiency in a minimum size. Radiator airflow is enhanced by a belt or electrically driven cooling fan.

The design features of an internal combustion engine are such that huge thermal energy is released during operation, which means that a reliable cooling system cannot be dispensed with. On Lada Largus, like on any other car with a similar internal combustion engine, antifreeze is used to effectively remove excess heat, which circulates continuously in a closed circle with the ability to cool. The durability of many engine components depends on the quality of antifreeze, as well as on its timely replacement.

Signs of the need for a procedure

Antifreeze is used as a coolant on the Lada Largus car. Its main purpose is to maintain the normal temperature of the power plant by removing heat. A malfunction of the cooling system or low-quality antifreeze can lead to the fact that the parts of the internal combustion engine, creating enormous heat energy during operation by friction, cannot cool in time. Further development of the situation is predictable.

All this leads to the most dangerous condition: overheating of the motor, as a result of which the internal combustion engine fails.

Overhaul will be required, which is not inexpensive, and besides, the process is laborious. To avoid such troubles, an efficient cooling system was created. Antifreeze is one of its most important components. He is directly involved in heat exchange.

Reasons for using antifreeze

Many motorists, especially beginners, do not understand: why use antifreeze if ordinary water can also cope with its task? It's all about the difference in chemical composition. Refrigerant is a complex chemical liquid, and this is not due to the desire of manufacturers to sell the product as expensive as possible using more chemicals.

During engine operation, antifreeze is exposed to high temperatures, we are talking about 100 degrees or more. Any other liquid, especially water, at such temperatures begins to boil and, accordingly, evaporate. In other words, to maintain the optimal level, you will have to constantly add new fluid to the system, which is not very convenient. In addition, the water contains various impurities, which, due to high temperatures, are deposited in the form of scale on the engine jacket and in the radiator, which ultimately leads to disruption of heat transfer and overheating.

Coolant replacement interval

In modern realities, it is not easy to choose an antifreeze that is ideally suited to the operating mode of the power plant due to the huge range and constantly changing technologies.

The service life, and therefore the time from one replacement to another, will be largely determined by:

• chemical composition;
• characteristics;
• the cost of a product of a particular brand.

If you refer to the manufacturers, the replacement frequency is on average once a year or depending on the mileage set by the manufacturer. For Lada Largus, the regulations of the car plant provide from 35,000 to 45,000 kilometers.

This should take into account the nature of driving, the technical condition of the engine and operating conditions. With negative operating factors, replacement can be carried out earlier. To be guided in this matter only by the mileage on the speedometer is not worth it. In addition, the quality of antifreeze is also of great importance, if the cooling system is faulty, low-quality antifreeze can aggravate the situation. Nor can you rely on mileage on Largus cars that use an aluminum radiator.

High-quality modern antifreeze for Lada Largus, due to some components in the composition, is able to retain its properties for a long time, regardless of operating conditions. For example, some brands of antifreeze, according to the manufacturer, do not need to be replaced at least 100,000 kilometers. Naturally, such new generation products are much more expensive, but it will depend on how often the car owner will have to change the coolant. Another plus is that even a beginner can easily find an expansion tank with this liquid by opening the engine compartment. A characteristic feature is in different colors (blue, green, red).

Antifreeze quality check

You should not trust the numbers on the canister, the indicated replacement period on the package does not always correspond to reality. Relying on these numbers, it is easy to find yourself in a situation where antifreeze, having exhausted its resource, will cease to perform its functions. And this will inevitably lead to overheating of the power plant, although the replacement is not yet needed in time. But you can avoid such situations and the troubles following them.

There are about ten ways to determine the quality, but not all of them are available to the average car owner. At home, you can independently verify the coolant in three main methods, the simplest and not requiring financial investments.

We check ourselves

Knowing these simple methods, you can quickly determine the quality of the coolant at home. In this way, problems with a low-quality product will be avoided.

Coolant selection rules

The cooling system of the Lada Largus car holds 5.45 liters of antifreeze, it is recommended to purchase at least 6 liters for replacement, the remaining volume can be used for topping up during operation or in the event of leaks (broken pipe, loss of radiator tightness, leakage due to weak clamps and etc.).

For Lada Largus, the manufacturer recommends pouring in the Glacoel RX brand coolant, it is this antifreeze that is poured at the factory. When choosing an alternative, it should be borne in mind that the fluid must comply with the D-class. This means that it is produced on the basis of ethylene glycol, to which a distillate is added, most often water. As an analogue, you can use the brand Motul Inugel Optima Ultra. A similar brand is also used on Renault vehicles. In general, you can pick up another option from a large assortment, the main thing is that there is compliance with the main parameters.

Mixing question

Many motorists doubt whether it is possible to mix different antifreeze. Such questions arise due to the fact that some manufacturers take the same antifreeze (that is, the chemical composition is identical), but compositions of different colors are used as dyes. Howbeit.

It is not allowed to mix refrigerant of different colors, let alone different brands.

The fact is that antifreezes with different chemical compositions, when mixed, can do more harm than good. Some car owners experiment with different refrigerants at their own risk. But it is not recommended to repeat their actions.

In the manual for many cars and Lada Largus in particular, it is written that manufacturers of coolant for painting add a special component to the composition. But the color of the staining will depend on the specific chemical composition of the liquid. When choosing by color, it is also recommended to be guided by the shade of the factory refrigerant.

Replacing antifreeze is one of the maintenance procedures required to keep the car in working order. This procedure should not be carried out often, but it should be approached very responsibly. Otherwise, serious problems with the engine may appear, the solution of which will require a considerable investment of time and money.

Timing of changing antifreeze for Lada Largus

The Lada Largus operating rules state - coolant change the described vehicle is made every 90 thousand kilometers... Moreover, neither the quality of the roads, nor the intensity of vehicle use are affected here. This figure is indicated, among other things, in the car service book. When purchasing a new car replacement is simple - when the numbers reach 90, 180, 270 thousand kilometers (and so on).

When buying a used car it is worth finding out when the antifreeze was last replaced. It may be worth changing the coolant immediately after purchasing the car, in order to avoid unpleasant consequences (for example, unplanned repairs). If the car has been in the garage for a long time, and in three years the total mileage was less than 90 thousand kilometers, it is also necessary to update the fluid in the cooling system. According to the manufacturer's recommendations, the product must be drained and change to a new one every three years.

The amount of antifreeze for Lada Largus with a complete replacement coolant in the car with air conditioning equal to 5.45 liters... In this case, it is recommended to buy a container with a volume of 6 liters (for example, in case of leaks in the system). If a air conditioning is not installed in the car, the volume of the cooling system is 4.5 liters... It is worth choosing antifreeze of the same brand that was used earlier, or of a similar type.

Instructions for changing the coolant in the car

The first thing to start with the coolant renewal procedure is selection of a suitable brand of product... When replacing antifreeze in Lada Largus, fluid of the same type is used. Mixing various means for engine cooling is strictly not recommended - this leads to very unpleasant consequences, up to the occurrence of serious damage. It is worth remembering - often domestic manufacturers call antifreeze antifreeze... But antifreeze is one of the types of antifreeze, and it is not suitable for every engine.

In machines of the Lada Largus model it is recommended to use coolant "GLACEOL RX" (type D) Is a recommendation issued by the vehicle manufacturer. Moreover dilution with water only allowed as a last resort... The antifreeze in the cooling system contains a set of anti-corrosion additives. And when diluted, these additives lose their effectiveness. Top up coolant with distilled water makes sense in summer, in extreme heat. In such a situation, the water contained in the product evaporates and the level of antifreeze in the system decreases. And it is recovered by adding the required level of distilled water.

To carry out the replacement, it is necessary to put the car on an inspection pit or on an overpass. It is recommended that observe safety precautions, to avoid injury and property damage:

• The car above the pit or overpass should be carefully secured: turn off the engine, put on the handbrake and leave the car at speed (in gear - by turning on the first speed or reverse). Special wedges are installed under the wheels.
• After installation, you need to wait until the engine has completely cooled down, as well as antifreeze in the cooling system.
• When working with antifreeze (antifreeze), remember that it is a poisonous substance. It is recommended to wear gloves and avoid getting the product in your mouth, ears, eyes or respiratory tract.

First stage replacement of coolant - draining used antifreeze from the system... First you need remove the platewhich is motor protection (protection of the power unit). It is located at the bottom and is supported by six mounts. They are unscrewed with a standard “10” wrench. It is recommended to carefully remove the bolts so as not to lose them during the maintenance process. Access to the bottom of the radiator opens. Experienced motorists recommend checking if the thermostat is working normally (if the system is overheating), if there are any leaks, in order to make repairs on time, if necessary.

In the case of Lada cars (including Lada Largus), there is no special hole in the cooling system for draining antifreeze. It has to be drained through a hose from the branch pipe radiator... But first you have to remove the expansion tank cap (unscrewed by hand), and release the pressure in the system. Then the cover is put back on. Before draining antifreeze need to cook capacity of at least six liters - the used coolant will go into it. Now you need to take pliers or pliers, loosen the clamp on the hose going to the radiator, and then disconnect this hose. You should act carefully - the liquid will flow immediately.

With the expansion tank closed in advance, the liquid will flow in a weak stream. Fixing the hose in the container for spent antifreeze, the owner can open the expansion tank again... This will speed up the drainage of the fluid from the system. Spent antifreeze can no longer be used. But it is not recommended to thoughtlessly pour it out - it is a very toxic agent that can poison the soil for a long time.

Second phase maintenance of the cooling system - its complete cleaning. The cooling circuit can be flushed at home if the necessary cleaning supplies are available. There are three ways to clean the system:

• With distilled water... The least effective option, but in certain situations it makes sense to use it. It is usually used when the cooling circuit is slightly dirty or when draining antifreeze due to leaks or engine repairs.
• Using home cleaning products... Motorists mix distilled water with weak acids and flush the system with the resulting solution. It is worth considering - a strong solution can negatively affect the rubber or plastic parts of the cooling circuit. For cleaning use: citric or lactic acid, concentrated vinegar solution (essence), soda. It is recommended to take 70-80 grams of citric acid per 5 liters of lukewarm water. This is enough to flush the system once.
• With the help of special tools... There are formulations added directly to the system. They are used to reduce contamination of the engine cooling circuit. But when flushing before replacing antifreeze, stronger agents are used. For complete cleaning, it is recommended to purchase alkaline and acidic agents, and rinse them in turn. An important point: you cannot mix these compositions... Acid and alkali, when mixed, neutralize each other, and the products completely lose their effectiveness.

Himself system flush process looks like that:

• The selected flushing liquid is poured (into a closed system).
• The engine starts up and warms up - it must work for 15-20 minutes (up to half an hour).
• In the case of distilled water - the liquid is drained.
• When use home remedies (in particular, citric acid): the liquid is kept in the system for 2-3 hours, then it is drained.
• In the case of special formulations for cleaning the cooling circuit: it is drained immediately or kept in the system for a certain time. The method of use depends on the product and is described in detail on the packaging.

In case of severe contamination, the procedure is repeated several times until the complete removal of dirt, scale, etc. After cleaning, it is necessary to proceed with the actual pouring of new antifreeze.

Last, third stage - filling the cooling system with new antifreeze. First, the hose from the radiator pipe is attached to its place (it is definitely worth tightening the clamp to secure it). Then unscrew the fitting cap on the hose, through which the antifreeze is supplied to the Lada “stove”. Now you should start pouring liquid into the system. At a certain point, antifreeze will start pouring out of the fitting. Close the hole possible no earlier than it is formed uniform, continuous jet! Otherwise, air will remain in the system: it will lead to a decrease in the efficiency of the circuit (almost to a minimum).

After closing the union, it is necessary fill the cooling system with antifreeze to the required maximum level (there is a mark in the expansion tank indicating the maximum). The reservoir is closed and the engine is started. It is necessary to warm up the engine well, periodically increasing the speed to 2.5-3 thousand. In the process, it is worth turning on the stove (in case of normal operation of the system, it will give an even stream of hot air). After the engine has warmed up, it is worth rechecking the system for leaks. If no problems are found, then this means that the replacement of the antifreeze was carried out successfully.

Lada with 8 valves

Most of the listed recommendations and rules for replacing antifreeze apply to each type of Lada Largus. Basically, the eight-valve model is an earlier Renault-powered variant. This motor differs in higher exactingness to the quality of fuel and relatively lower power (on paper - in fact, there is no difference). But this does not affect the principles of replacing antifreeze in Lada Largus with an 8-valve motor.

Of the insignificant differences, it is worth mentioning a faster engine cooling and other protection of the power unit. A number of owners note that engine eight valves cools down relatively faster... For this reason, you can start changing the coolant earlier. Second point - motor protection on the described vehicle looks different... But this factor does not affect the process of replacing antifreeze.

Lada with 16 valves

The first thing worth noting is that the method described above for changing the coolant is suitable, first of all, for Lada Largus with a 16-valve engine. This engine, produced by the AvtoVAZ concern, began to be used from the moment the designers abandoned the 8-valve engines. The engines of the base models were changed in 2015. And for vans and station wagons, a similar procedure was carried out already in 2017. Wherein replacement of antifreeze in Lada Largus on 16 valves has already been described above.

The owners of the model in question need to remember - here the same type of cooling system is used... And the procedure for replacing antifreeze looks the same. The only thing worth remembering is that a number of motorists claim that the AvtoVAZ engine cools down more slowly.