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

02/27/2022 2,964 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.

How to drain fluid from the system

Please note that when replacing antifreeze on a VAZ-2109 (injector), it is necessary to drain all liquid from the system. To do this, you need to install the car in such a way that its front part is much lower than the rear - due to this, all the liquid from the radiator will flow to the drain holes. The stove tap must be open. The procedure for draining the liquid is as follows:

1. Wait until the engine cools down to 35-40 degrees. Otherwise, you can get a burn, and if you consider that antifreeze contains a large number of chemical reagents, then poisoning.
2. Place a container of at least 10 liters under the drain hole on the radiator. The generator must be covered with a bag.
3. Unscrew the plug and drain the liquid. Do not forget that it will flow normally only if the plug on the expansion tank is unscrewed.
4. Then you need to drain the liquid from the engine block. To do this, use a key number 13 to unscrew the plug, which is located on the front of the engine block.

Before replacing antifreeze on a VAZ-2109, you will need to check the condition of all elements of the cooling system. Replace if necessary.

For example, the fluid pump needs to be changed approximately once every 70-90 thousand km. Please note that its resource may be shorter - it all depends on the manufacturer of the product. The thermostat should also be changed on time; its service life is unlikely to exceed 50 thousand km. It is recommended to change it once every two years - in this case, you will be able to avoid surprises on its part.

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.

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.

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.

Necessary tool for draining coolant on VAZ 2109-2108

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

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.

How to add fluid to the system

The procedure for replacing antifreeze on a VAZ-2109 is simple; all you need to do is follow all the requirements. When pouring fluid into the system, you will need to park the car so that the front is higher than the rear. In this case, the liquid will flow to the lowest point, which will be the heater radiator. In this simple way you will be able to get rid of air jams in the system as much as possible. Filling with liquid is done only after thorough rinsing: to do this, fill and drain distilled water several times.

Next, after closing all the drain holes and making sure that there are no leaks, you can fill in clean antifreeze. But keep in mind that when driving in the warm season, it is allowed to dilute it with distilled water in a 50/50 ratio. In this case, the liquid will not freeze at temperatures down to -20 o C. After refueling the system, you need to start the engine and let it warm up to operating temperature. The plugs should go away on their own, but to speed up the process of getting rid of them, you can put on gloves and squeeze out all the thick pipes.

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

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.

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.

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Discuss the article:

What to choose?

What do we choose?

Many car owners often wonder about the choice of coolant - antifreeze or antifreeze: which is better? Let's try to figure out what's what without going into deep truths.

Antifreeze

• In fact, all coolants are and are called antifreeze. And antifreeze is no exception to the rule. In fact, antifreeze is just the name of one of the types of antifreeze developed in our area, for our area and for our cars.
• In terms of its performance and characteristics, antifreeze is in many ways inferior to other antifreezes.
• The price of antifreeze is much lower than other coolants.
• Antifreeze is more common among domestically produced cars.

Antifreeze

• There are very, very many antifreezes in the world. They differ in composition, base, color, and so on.
• Various antifreezes include various special additives that help better maintain the car's cooling system and at the same time increase the service life of the antifreeze itself.
• The cost of antifreeze is higher than antifreeze, and it is quite widespread.

Conclusion

Summarize. Antifreeze or other antifreeze? So:

• Antifreeze is undoubtedly better in quality.
• BUT antifreeze is much more practical for several reasons.
• Antifreeze was SPECIALLY designed for our climate and our cars.
• Antifreeze is available in almost every domestic car that passes you. And this can sometimes save (in case of a breakdown on the road).
• There is enough antifreeze for the car to function normally and the cooling system to work as expected.

It is more practical and cheaper (which is very important) to use antifreeze.

Replacing antifreeze for VAZ 21099 injector

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I read it. In this regard, a question. drained the old antifreeze. then a new one was poured through the expansion tank. Next, do you need to start the engine without closing the cap on the expansion tank? Top up with antifreeze and close the cap on the expansion tank? further warm up.

I did this: I drained the old antifreeze, poured in as much as the level would fit on the expansion tank, left the cap open, started the engine, it warmed up a little, the antifreeze began to leave, I added it directly while the engine was running and continued to add it several times until it stopped leaving. PS If the stove is cold, it means either an air lock or not topping up, in which case, with the internal combustion engine running, you need to squeeze the coolant outlet and inlet pipes.

and is it necessary to open the stove tap?

My red-haired antifreeze is a bastard. The cooling system needs to be cleaned. Have you tried any flushes? Which tasol is better to take? what factory?

Outlet and inlet pipes to the expansion tank?

So, based on all of the above, I describe the process of replacing the coolant (coolant) on the injector.

a) Draining the coolant.

1. Allow the engine to cool 2. Open the heater tap 3. Open the expansion tank cap 4. Remove the ignition module to access the cylinder block plug 5. Drain the coolant from the cylinder block 6. Drain the coolant from the radiator

b) Cleaning the cooling system

1. Close the radiator and cylinder block caps 2. Install the ignition module 3. Fill the expansion tank with cooling system cleaner to the level 4. Do not tighten the cap of the expansion tank 5. Start the engine 6. If fluid leaves the expansion tank, top up. 7. Close the cap of the expansion tank 8. Warm up the engine until the cleaner circulates through the radiator 9. Stop the engine and wait until it cools down 10. Open the cap of the expansion tank 11. Remove the ignition module to access the cylinder block plug 12. Drain the cleaner from the cylinder block 13. Drain radiator cleaner

c) Filling coolant

1. Close the radiator and cylinder block caps 2. Install the ignition module 3. Fill the expansion tank with coolant to the level 4. Do not tighten the cap of the expansion tank 5. Start the engine 6. If fluid (coolant) leaves the expansion tank, top up. 7. Close the expansion tank cap 8. Drive up the hill (set the nose of the car higher than the trunk) 9. Open the expansion tank cap. 10. Run the gas for a minute (up to 4000 rpm), observing the coolant level in the tank; if it decreases, add more 11. Close the expansion tank cap 12. Let the engine cool. 13. Top up if there is a lack of coolant.