Replacing coolant on a VAZ 2109, how to drain and refill antifreeze

01/25/2022 2,900 Cooling system

Author: Victor

If the cooling system of a VAZ 2109 car uses antifreeze that has lost its technical properties, this will lead to overheating of the engine and serious problems with the unit. In this article we will look at how to drain the VAZ 2109 Antifreeze and fill it with new fluid, as well as how often this should be done.

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Replacement frequency

According to official regulations, the manufacturer provides for replacing the coolant in cars with carburetor or injector engines every 50-75 thousand kilometers. Such a large interval is due to the fact that it is at this interval of kilometers traveled that the refrigerant begins to lose its properties. And the use of used antifreeze is not allowed. It is not advisable to change the coolant more often than every 50 thousand km.

Signs of the need for urgent antifreeze replacement

The need to change the coolant earlier than required by official regulations may arise in several cases:

1. If sediment has formed in the refrigerant. The presence of deposits in the substance indicates that it has begun to lose its properties. When sediment settles in a dense layer at the bottom of the expansion tank or in the lines, this leads to the fact that the liquid cannot circulate effectively through the pipes and channels. Refrigerant deposits are more noticeable at low air temperatures.
2. Increase in coolant crystallization temperature. To determine at what temperature a substance will begin to freeze, you need to check the density of the refrigerant. The diagnostic procedure is carried out using a hydrometer. In the absence of a device, you can visually determine the increase in crystallization temperature. This refrigerant develops a yellow coating. It will not be visible in the liquid itself, but it can be clearly seen on the expansion tank plug in the engine compartment.
3. Change in color of the refrigerant and formation of a brown tint. If the substance becomes browner, this indicates the presence of corrosive deposits on the metal components of the cooling system. A change in color may be due to the fact that the antifreeze additives have lost their performance characteristics.
4. Overheating of the power unit. If the problem is not related to mechanical problems in the car engine, then you need to check the quality of the refrigerant.

The Avto-Blogger channel published a video that describes in detail the reasons for antifreeze leakage from the car’s cooling system.

Work progress

So, how to drain antifreeze from a VAZ 2109? The following steps must be completed: The first is arranging the work area: using a lifting device or installing a car over a pit, work clothes and prepared tools.

Second, open the hood of the car and unscrew the cap of the expansion tank.

The third is to move the heater knob in the car interior to the extreme right position.

The fourth is to release the crankcase protection by unscrewing the bolt at the bottom of the car.

Fifth - unscrewing the radiator drain plug with preliminary installation of the container and draining it.

Sixth, you need to drain the VAZ 2109 antifreeze from the engine, which will require unscrewing the drain cap from the cylinder block, replacing the container.

Seventh – loosen the clamp and pull out the heating hose from the carburetor fitting. Eighth – screw on all the unscrewed plugs. Ninth – new antifreeze or drain the old one, fill the expansion tank back in. It should be poured until liquid appears at the fitting. The tenth, completing the instructions on how to drain the VAZ 2109 antifreeze - pull the hose into place and throw in the clamp.

After replacing the antifreeze, the engine fluid should be warmed up by turning on the engine. Be sure to make sure the fan is working properly. If it fails to work, the engine will overheat and the car will need real repairs. For those who want to visually familiarize themselves with the question of how to drain antifreeze on a VAZ 2109, we recommend finding a video. Many videos are presented on various video services.

The replacement concept involves draining the used compound through special holes and filling the system with new antifreeze. The designers provide two drain holes in the cooling system of VAZ engines:

• on the left side of the main radiator;
• on the front wall of the cylinder block.

Replacing antifreeze on VAZ 2109 engines is not possible without first dismantling the ignition module located on the front surface of the cylinder block:

• remove the negative terminal from the battery;
• disconnect the wires from the spark plugs;
• remove the ignition module power supply block;
• unscrew the bolts securing the module relative to the cylinder block and clutch housing;
• loosen the upper left bolt of the front engine mount;
• remove the module bracket from under the bolt;
• remove the module with wires from the engine compartment.

Draining of used antifreeze is carried out according to the following method:

• open the heater tap;
• connect the expansion tank to the atmosphere by unscrewing the cap (under such conditions, rapid flow of liquid from the system is ensured);
• place the container and unscrew the cap in the lower left corner of the engine radiator, wait for the liquid to drain;
• Unscrew the drain nut on the cylinder block and drain the coolant from the “jacket”.

For your information. If the drained liquid is dirty and rich in various inclusions, the system should be flushed with plain water:

• clog the drain holes;
• pour water through the expansion tank and close it;
• start the engine for 3-4 minutes;
• shut down and drain.

The operation is repeated until the waste water is clean.

Having removed all the liquid from the system, you should:

• install all drain fittings back;
• install the ignition module in reverse order;
• connect the vehicle's ground to the battery;
• pour new antifreeze through the expansion tank (see filling technology below);
• start the engine for 1-2 minutes;
• add coolant and close the expansion tank;
• warm up the engine until the cooling fan operates and turn off;
• if necessary, add coolant to the virtual average mark (between MIN and MAX).

fluid replacement The procedure for replacing used antifreeze on a VAZ 2109 is fraught with a significant pitfall: in the process of filling the system with a new composition, there is a high probability of air pockets appearing. When the engine warms up for the first time after replacing the coolant, it is necessary to monitor the engine temperature:

• the coolant temperature arrow is approaching the red zone, and the cooling fan has not worked and cold air is blowing from the heater - there is an air lock in the system;
• hot air comes from the stove, but the fan does not work at the set temperature (about 105-107 degrees) - the fan is faulty;
• The fluid level in the expansion tank tends to increase.

The correct method of filling the system with liquid will help to avoid the appearance of an air lock:

• pour antifreeze into the expansion tank (full filling of the container is allowed);
• disconnect the compound supply hose from the throttle assembly heating fitting;
• add the composition as the expansion tank is emptied;
• if there is a phenomenon of liquid leakage from the heating fitting of the throttle assembly, put on the antifreeze supply hose (you may need to create a slight pressure in the tank (one or two deep exhalations into the tank are enough);
• close the tank.

Important! Before you begin the replacement process on the VAZ 2109, you must disconnect the “-” terminal from the battery.

You can change the coolant only when the engine has completely cooled down!

Draining process

1. To drain the cooler, place your car on a horizontal platform. If there are no such conditions, then try to make the front of the car slightly higher.
2. Move the heater control lever all the way to the right.

Heater lever position

• Remove the ignition module with bracket.
• Unscrew and remove the tank cap. Unscrew the cap of the antifreeze tank
• Place a container under the drain plug, the volume of which should be approximately 10 liters to drain the old cooler.
• In order to drain the old cooler, unscrew the plug located on the engine cylinder block.

  
  Unscrew the plug on the cylinder block

• Drain the old coolant completely.
• Wipe the engine if liquid gets on it.

2. After completed operations, bring the fluid level to normal (there is a MAX mark on the tank itself, this is the level to which the fluid needs to be filled) and start the car’s engine, let it idle for a while until the cooling fan starts working (If your fan has never worked, then just bring the engine to operating temperature), as soon as it starts, turn off the engine and wait until it cools down completely, during which time you can inspect the cooling system (In this case, look at all the places from where you disconnect the hoses, look at the radiator, there should be no leaks anywhere) and, if necessary, add more fluid to the expansion tank (But this is only when the engine has completely cooled down and under no circumstances unscrew the expansion tank cap while the engine is hot).

Additional video: You can see in more detail the process of replacing the fluid using the example of a VAZ 2110 car, where everything is done in exactly the same way as on cars of the Samara and Samara 2 family.

There are three main types of cooler:

1. Water.
2. Antifreeze.
3. Antifreeze.

The first is practically no longer used, as it boils away quickly, causes damage to metal parts of the engine and is dangerous when used in the cold season. The second is the most common and inexpensive. It is produced from inorganic compounds, which creates an oil film on the engine walls, which significantly reduces thermal conductivity.

If problems constantly arise in the cooling system, it is most practical to use antifreeze, since it is more financially profitable. Owners of VAZ 2109, 2108 and VAZ 21099 cars, no matter whether carburetor or injection, are more likely than others to encounter this problem. The most common breakdowns are:

How to replace antifreeze on a VAZ 2109 yourself? The answer to this question is discussed below and until the end of the article. Be careful.

What will be needed to ensure that the replacement of antifreeze on a VAZ 2109 occurs without wasting extra time and effort? Prepare the following in advance:

• Antifreeze or antifreeze - 8 liters
• Container for drainage (to fit under the car)
• 13mm socket, extension and ratchet
• Or a 13mm wrench (open-end or socket)
• Key for 8
• Key for 10
• Screwdriver
• Watering can

Have you prepared? You can start working.

Draining antifreeze

• So, our VAZ 2109 is in the pit and ready to drain the antifreeze.
• Before you start draining it, take a 10mm key and be sure to unscrew the negative terminal of the battery so that when you drain the antifreeze, a short circuit does not occur, and you don’t have to repair it later with an electrician.
• Place a previously prepared antifreeze container under the car, which should be about 10 liters in volume.
• Remove the cap on the expansion tank of the cooling system.
• Take a 13mm socket with the rest of the accessories or a 13mm wrench and unscrew the drain plug from the cylinder block.

Draining process

Very often you can hear complaints that the coolant is leaking in the VAZ 2109. There are many factors why this happens, but let’s focus on the main ones:

• The pipe clamps are not tightened enough;
• cracks or abrasions have appeared in the pipes;
• an air lock appeared when filling;
• underfilling;
• problems with the radiator;
• the damper is not closed enough;
• There may also be other problems with the cooling system.

Level control and required volume

Before changing the working fluid, the car owner should know what the volume of the Nine’s cooling system is and how much refrigerant it will contain in order to buy the required amount of fluid to complete the task. When changing, the plastic reservoir under the hood will hold about 8.7 liters of antifreeze. If the working substance is not completely drained from the system, then approximately 7-7.5 liters will be poured into it. As for the level control, it is carried out according to the expansion tank marks in the engine compartment. Please note that when the car engine is warm, the fluid volume may be higher. Therefore, before checking, the engine must be turned off and allowed to cool.

Ideally, the refrigerant level should be between two marks - MIN and MAX.

Serber24 user Sani4 in his video clearly demonstrated the procedure for changing antifreeze in a VAZ 2109 car.

For what reasons is coolant consumed?

There are several reasons why the volume of refrigerant will decrease in the refrigeration system:

1. Low negative temperatures. In severe frost, the liquid decreases in volume. This reason cannot be called a leak, but car owners in winter often confuse this problem with a fluid leak. During the cold season, experts recommend adding refrigerant to the system.
2. Formation of cracks and damage in the expansion tank or on its cover. As practice shows, if the defect on the container is insignificant, it will not be easy to detect it visually. The crack may resemble a scratch. Detailed diagnostics will be required. To identify the location of the leak, you will have to use a special dye that is added to the liquid.
3. Lack of tightness in the connections of the lines or damage to the pipes. This problem can be clearly identified. In places of malfunctions, wet traces of refrigerant are visible. If the defect is minor, then it will also not be possible to detect it through visual diagnostics. You will have to add dye to the refrigerant.
4. Damage to thermostat or gasket. If there are defects in the device seal, liquid will leak out, and over time its amount in the cooling system will decrease.
5. Damage to the radiator device of the heating system. During operation, the radiator wears out. If it has already reached the end of its service life, refrigerant may leak through cracks formed on it or through the hose connected to it. Adding liquid is not practical; the cooling radiator must be replaced.
6. Presence of defects on the cylinder head gasket. If there is damage, a leak will form. As a result, the antifreeze will begin to mix with the engine oil, which will enter the coolant. Repairing the problem involves replacing the cylinder head gasket.

Topping up

The coolant addition procedure is performed with the engine cold. In order to add antifreeze, you need to open the hood of the car and unscrew the cap of the expansion tank. The required amount of liquid is added to the reservoir, after which the lid is screwed on.

If it is not known what fluid was used previously, it is better to change it. Because mixing different types of refrigerants will cause the substance to lose its properties.

What to choose?

Today, when replacing coolant on domestically produced cars, people most often talk about antifreeze. But in addition to antifreeze, antifreeze is actively used for more modern cars.

For the VAZ 2109 cooling system, it is quite possible to use antifreeze rather than antifreeze.

Variety of assortment

Taking into account the characteristics of each of the presented types of coolant, certain conclusions can be drawn:

1. If we take into account the quality characteristics, antifreeze is significantly superior to antifreeze.
2. Antifreeze is more practical, given its adaptability to our cars. Its composition is developed with an eye to the local climate, car quality and road conditions.
3. You can ask for antifreeze from any oncoming driver passing by if your VAZ 2109 breaks down.
4. The characteristics of antifreeze are quite sufficient to ensure the normal functionality of the CO.

Instructions for self-replacement

Below we will look at how to replace the coolant in the Nine.

What will be required for replacement?

If you change the refrigerant yourself, you will need the following:

• wrench 8;
• hex wrench 12;
• a cut-off bottle or bucket into which you will drain the used refrigerant;
• distilled water or a special product if there is a need to flush the cooling system.

From the video by AvtoDrive user you can learn how to replace the refrigerant in a VAZ 2109 car.

How to drain?

To completely drain the Antifreeze in a VAZ 2109 from the system, do the following:

1. The vehicle is driven into a garage with a pit or onto an overpass. The surface on which the machine stands must be level. If it is not possible to provide such conditions, then make the front of the car a little higher. To do this, place the front wheels on a jack.
2. Start the car's power unit and move the heater control knob to the extreme right position so that the heater blows hot air.
3. Reach under the vehicle and remove the engine crankcase protection. To do this, unscrew the screws that secure it.
4. Stop the engine and loosen the bolt holding the negative battery terminal. This is done to prevent a short circuit from occurring during the draining process.
5. Unscrew the filler cap on the expansion tank. This will reduce the pressure when draining the waste substance.
6. Place a container for collecting waste under the drain plug on the cylinder block. Unscrew the cap and the process of draining the waste liquid will begin.
7. When draining is complete, replace the plug. Now you need to drain the working fluid from the cooling radiator. To do this, unscrew the plastic plug on the radiator, placing a container under it in advance. When the draining is complete, screw the lid back on.

How to properly wash?

If the drained refrigerant is too dirty or contains traces of deposits, the cooling system must be flushed. To do this, you can use distilled water or a special cleaning agent, which is sold at any car store.

The correct washing procedure is as follows:

1. The distillate or flushing agent is poured into the VAZ 2109 power unit through the filler hole located on the tank under the hood. To do this, unscrew the cap and add enough liquid there so that its level is between the MIN and MAX marks on the container.
2. Start the car engine and let it idle for about ten minutes.
3. Turn off the engine and repeat the process of draining the substance.
4. Assess the quality of the drained liquid. If it is too dirty and there are traces of sediment left in it, the procedure for flushing the system is repeated until the water becomes more or less clear.

An Aveo Show user in his video showed how to replace antifreeze and clean the cooling system in a VAZ 2109 car.

How to fill?

You need to fill in antifreeze as follows:

1. Unscrew the reservoir cap in the engine compartment. For greater convenience, you can install a watering can in it.
2. Make sure all caps (drain and radiator) are securely tightened. Check the integrity of hoses and lines. Make sure the thermostat is in working order.
3. Pour fresh fluid into the expansion tank. The refrigerant level should be between the MIN and MAX marks.
4. Tighten the expansion tank cap and start the engine.
5. The engine should run for about ten minutes at idle speed.
6. Reach under the car and make sure there are no coolant leaks.

Replacing coolant in the engine cooling system of VAZ 2108, 2109, 21099 cars

You won’t need too many tools, but it’s still worth mentioning the minimum that will be needed:

• Phillips screwdriver
• socket head 13
• ratchet handle or crank

You will also need the following materials:

• two 5 liter canisters of antifreeze - I used a red Fellix Carbox
• a dry rag to wipe up traces of liquid if you spill it
• thin hose about 50 cm long - optional
• drain container

If antifreeze or antifreeze flows out of the system and is very dirty, has traces of rust and other particles, then it is necessary to flush the cooling system several times, pouring ordinary water into it and draining it back. This procedure must be repeated until the water comes out clean!

Also close the radiator tap and you can start pouring new antifreeze into the VAZ 2109-2108 system.

This must be done in a thin stream without sudden movements, so as not to form an air lock. Otherwise, you will have to drive it out later by opening the cap of the expansion tank and, with the “face” raised, heavily revving the engine on a warm engine.

After the new coolant is poured into the system up to the mark in the MAX expander, tighten the tank cap and start the engine. Let it run until the radiator cooling fan comes on. Then you can turn off the engine and, after a long stay, check the fluid level in the tank again. If it drops below the MAX mark, you need to top it up to the required level!

coolant The cooling system of the “nine” engine is a closed circuit through which the working fluid – liquid (coolant) – is forced to circulate. The main elements of the circuit are an expansion tank, two radiators, a centrifugal-type vane pump, a thermostat and pipes.

1. Empty containers of 8-10 liters.
2. Antifreeze or antifreeze, at your discretion.
3. The key is "13".

1. Turn off the engine and wait until it cools down.
2. Open the heater tap.
3. Then unscrew the expansion tank cap.

4. Unscrew the drain plug in the lower right corner and drain the coolant into a previously prepared container.

5. Using a 13mm wrench, unscrew the drain plug, which is located in the front part of the cylinder block, then drain the coolant from the cylinder block jacket into an empty container. To get to the plug, you will need to remove the ignition module, to do this, using the “10” socket, unscrew the three fastening nuts that secure the ignition module to the bracket.

1. When the liquid has completely drained, tighten the drain plug that was unscrewed earlier.
2. Pour antifreeze or any other coolant into the expansion tank.
3. Start the engine and warm it up to 60-80°.
4. Now turn off the engine and check the antifreeze level, it should be within the “min” and “max” values.

The VAZ 2108 coolant has been replaced! Thank you for your attention.

This video presents a detailed diagram of replacing the cooling fluid of a VAZ 2109 car.

We tried to tell you in detail how to drain and replace the fluid on a VAZ 2109 car. And if you have questions, please share them in the comments!

What kind of coolant was added from the factory?

Signs of the need for urgent antifreeze replacement

Choice of fluid for VAZ 2109

Level control and required volume

For what reasons is coolant consumed?

Instructions for self-replacement

What will be required for replacement?

How to properly wash?

What are the consequences of an untimely change?

Video “Visual aid to replacing antifreeze”

Previously, during production, the injection and carburetor versions of these cars were filled with pink Felix coolant. Therefore, most car owners still prefer to pour this particular antifreeze.

The cooling systems of the VAZ 2109 are insensitive to the addition of certain refrigerants. Therefore, in addition to Felix antifreeze, if necessary, you can use traditional blue antifreeze. In practice, products from the manufacturer Luxe Antifreeze, green in color, have proven themselves well.

Welcome! Coolant - it is only needed for the cooling system and in other systems of the car it is not used anywhere else, thanks to it the engine is cooled during operation and thus the engine takes longer to boil (If the system is working properly, then it practically does not boil at all), if remove the liquid from the system, it will work, but it will boil so quickly (in about 5-10 minutes.

), that you will have to constantly turn off the engine of the car and wait until it cools down at least a little, in addition, you will not be able to find out the temperature of the engine without liquid, because the sensor that monitors the temperature usually reads the temperature not at the engine (That’s just how it is already are accustomed to calling it, although the temperature of the liquid and the engine may even differ) and at the coolant itself and how will it determine the temperature if this liquid is not there, so for the future, under no circumstances should you drive a car if all the liquid suddenly leaks out, so as you will not drive far and most likely ruin the engine of the car.

Note! To replace this fluid in a car, you will need: An empty container of at least 10 liters (Although you can take less, it’s best to stock up on a 10-liter container to avoid spilling the liquid), as well as wrenches, and a clean rag. so that she can wipe her hands and if liquid gets on the car engine, wipe it off it; in addition, hex keys and different types of screwdrivers may be needed!

Draining: 1) Let's start with the fact that there is nothing complicated about this; the main thing, as always when making repairs, is to know some of the nuances, first you will need to drive your car into the inspection hole and at the same time the car should stand level, in extreme cases it is allowed that the front part of the the car was slightly higher than the rear one, but not the other way around, besides, when the car enters the pit and you turn off the engine, be sure to let it cool completely, otherwise you will get burned by the coolant when you drain it, at operating temperature of the engine, the fluid temperature reaches about 85 -90 degrees.

3) Now sit in the car and turn the heating knob all the way to the right (Unfortunately, the knob is not visible in the photo below, but the place to which you will need to turn it is indicated by an arrow), as soon as you turn it, get out of the car and climb under its bottom , while there, remove the crankcase protection so that it does not interfere with draining fluid from the radiator, or if instead of the protection you have a standard engine mudguard installed, which was installed from the factory on all cars of the Samara family, then read the detailed article on its removal, it is called: “Replacing the mudguard engine for VAZ."

Pouring: 1. Firstly, screw back all the plugs that were removed earlier (Radiator plug and cooling jacket plug) and then proceed to pouring the coolant; on cars with a carburetor and with an injection engine, the liquid is filled differently, first let’s disassemble the carburetor (If you have an injector, then read the Note section!

below), for filling, stock up on a screwdriver with a Phillips-shaped blade and use it to slightly loosen the clamp that secures the heating hose (see large photo below), as soon as the clamp is loosened, disconnect this hose from the carburetor fitting and here you will need the help of an assistant (Although you can do it yourself if you don’t have an assistant with you), ask your assistant (Or do it yourself) to start pouring coolant into the expansion tank (you unscrewed the cap of this tank at the very beginning), all this must be done until the liquid begins to flow out of carburetor fitting (see

What are the consequences of an untimely change?

If replacement deadlines are not met, the car owner will face the following problems:

1. Antifreeze will not be able to perform its intended functions. This will result in the car's heating system not working as efficiently at low temperatures. In some cases, the stove does not function at all.
2. Due to the appearance of sediment in the pipes and radiator of the car, the circulation of the working fluid will be disrupted. This will cause excessive heating of the power unit. Prolonged use of a machine with an overheated engine can lead to failure of the unit.

Photo gallery

Photos of replacing the refrigerant are shown below.

1. Open the hood and unscrew the reservoir cap

2. Move the heater control lever

3. Unscrew the plug on the radiator device

4. Fill the expansion tank with fresh refrigerant

Features of coolant replacement technology

• the coolant temperature arrow is approaching the red zone, and the cooling fan has not worked and cold air is blowing from the heater - there is an air lock in the system;
• hot air comes from the stove, but the fan does not work at the set temperature (about 105-107 degrees) - the fan is faulty;
• The fluid level in the expansion tank tends to increase.

The correct method of filling the system with liquid will help to avoid the appearance of an air lock:

• pour antifreeze into the expansion tank (full filling of the container is allowed);
• disconnect the compound supply hose from the throttle assembly heating fitting;
• add the composition as the expansion tank is emptied;
• if there is a phenomenon of liquid leakage from the heating fitting of the throttle assembly, put on the antifreeze supply hose (you may need to create a slight pressure in the tank (one or two deep exhalations into the tank are enough);
• close the tank.

Video “Visual aid to replacing antifreeze”

User markozia in the video showed how to do the procedure for replacing the coolant on a VAZ 2109 car with your own hands.

Do you have any questions? Specialists and readers of the AUTODVIG website will help you ask a question

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How to buy high-quality antifreeze for VAZ-2109

When buying antifreeze for your favorite iron horse for the first time, pay attention to the manufacturer of the product - it is better if it has already established itself in the market. By the way, imported manufacturers produce high-quality products, but they are not always suitable for the VAZ-2109. The color of the liquid should have a blue tint. Experts recommend a red composition for cars driven in the Far North.

Now a few words about the canister. A flat sticker with information about the composition of the liquid is preferable; the manufacturer also records the factory address. Only then does the likelihood of buying a fake decrease to zero.

Antifreeze is an unusual liquid, it is toxic and dangerous, unless, of course, the usual safety rules and use of the material are followed.

How to protect yourself from harmful antifreeze fumes?

1. Lean to the side, or better put on a respirator.
2. Replace the fluid while wearing thick rubber gloves. After replacing the antifreeze, they must be thrown away, packed in a plastic bag.
3. If you accidentally spill antifreeze, wipe it dry with a rag - antifreeze causes corrosion.