How to flush the engine cooling system of a VAZ 2109 injector

When and why to flush

Solving this problem does not require special skills and knowledge, so you can flush the cooling system yourself. It is recommended to do this more often, but even if you perform cleaning once a year, you can achieve a positive effect.

Flushing allows you to avoid the occurrence of various malfunctions associated with the cooling system. The need for this procedure often arises due to the use of low-quality or expired antifreeze, which negatively affects the cooling unit of the car.

You can clean the cooling system less frequently if you adhere to the following rules for using antifreeze:

How to flush the cooling system of a VAZ 2109

You can rinse the cooling system with ordinary boiled (!) water. Boiled, because this way we minimize the amount of salts and minerals in the water that will remain after flushing in the system. Flushing the system is easy. The old fluid is drained, boiled water is poured in, the engine is allowed to idle for 15-20 minutes, after which the water is drained.

This method is ineffective, but very cheap, because water is practically free. If the owner does not spare 300-500 rubles for a special means for flushing the system, then the effect of the procedure will be a hundred times higher. The fact is that these flushes contain substances that carefully and carefully remove scale and coolant decomposition products. And this is a truly effective flush. For example, liquid for flushing the BBF system costs about 300 rubles per flush. After washing, even plaque is removed; the main thing is to strictly follow the instructions.

Simple cleaning products

Almost every owner has distilled water available. It is quite suitable for cleaning the system from simple contaminants. The water washing process is carried out in the following order:

These steps must be repeated until the water is clear when drained. This method will not help get rid of contaminants such as scale or rust.

You can also use lactic acid, caustic soda or vinegar to flush the cooling system. These products need to be mixed with distilled water, and then the same steps described above are performed. There should not be too much acid, otherwise such a solution can damage the rubber and plastic elements of the car. At the end of the procedure, you need to fill in clean distilled water, which is necessary to clean the system of residual solution.

What is the best way to flush the cooling system at a service station or do it yourself?

The first option is certainly simpler, but it is also more expensive, the second is less pleasant, but you will gain invaluable experience and also get good savings. If you are not short on time and have a little understanding of what SOD is, then I recommend flushing the cooling system yourself . Read on to find out how to do this.

Features and methods of flushing the cooling system

As I already said, unfortunately, the vast majority of car owners do not even know about the need to carry out such a procedure, perhaps you do the same - just add antifreeze to the level and that’s it. However, this will not always be the case, and at one unpleasant moment the cooling system will simply stop functioning, and you will get overheating with all that it entails. I recommend monitoring the condition of the antifreeze, and not adding it, but making a complete replacement, then during draining you will be able to see what condition it is in. If you have drained the coolant and it is black or dark brown, you know that your cooling system has big problems.

Flushing the VAZ 2109 engine cooling system

From time to time, the eight and nine engine requires flushing the cooling system. This is mainly due to the use of low-quality coolants such as antifreeze, which contributes to the formation of plaque and deposits on the walls of the water jacket. Such liquids have an even more destructive effect on the heater radiator and on the main radiator of the cooling system. If the radiator is tightly clogged with coolant decomposition products, it is simply unable to perform its function and the engine instantly overheats even in cold weather. And this doesn’t mean anything good. This is why the cooling system should be flushed.

There are two types of SOD purification:

External - when insects, dust, oily stains, dirt and other nasty things are removed from the surface of the radiator. Typically, this cleaning is done using a jet and car shampoo.

Dirty radiator - poor cooling

Internal - provides for the removal of deposits consisting of rust, scale, antifreeze decomposition products and rubber parts from the engine cooling jacket and radiator. In addition, contamination and scale are possible in cases where the car owner uses ordinary tap water as coolant. This should not be done under any circumstances, since such water contains a huge amount of salts, impurities and various substances, which, when heated, are deposited on the walls of the cooling system in the form of plaque, complicating heat transfer and reducing the cross-section of the SOD passages.

Where does scale and deposits come from in the cooling system?

As you know, antifreeze does not form scale, however, if you do not completely replace it, but constantly add it, then over time its concentration will consist of more than half of water, and the additives that are included in its composition will begin to disintegrate, depositing on the walls thick layer of plaque. Read above about what happens next. Dust, oil, dirt, rubber waste and rust also contribute to contamination and can create a blockage in the cooling system or simply deposit as deposits on the walls.

Parameters of the VAZ 2109 injector cooling system

The cooling system of the VAZ 2109 injector is practically no different from other VAZ cooling systems. The proud prefix “injector” may indicate that the system has a thermostat of a different configuration, but this is not a fact. It can also be a regular number eight. We won’t start spewing letters about how a cooling system is necessary and you can’t go anywhere without it; even a child can understand this. We present only some book parameters for precise control of system performance. Parameters are temperature conditions that the system must maintain and adjust, depending on the condition of the engine.

  1. The volume of the cooling system of the nine is 7.8 liters. They pour whatever they like into the system, but we would not recommend following the lead of genetic memory and pouring Antifreeze into the expansion tank. Real Antifreeze A40 has not been produced for twenty years, and what is sold under this brand is rare rubbish, not recommended for use. Nine will gladly swallow any coolant recommended by AvtoVAZ or similar in composition.
  2. 99 degrees is the closing temperature of the fan motor relay. 93 degrees is the contact opening temperature, then the fan turns off. Knowing this, you can find out the approximate coolant temperature without a suspicious thermometer on the panel. The normal operating temperature of antifreeze is 85-95 degrees.
  3. The thermostat of the cooling system divides it into two circuits - large and small. This is convenient in the cold season, when, in order to quickly warm up the engine, the thermostat valve closes a large circle and the antifreeze circulates in a small circle. When it warms up to operating temperature or so, the valve opens and the antifreeze enters the large complete cooling circuit.
  4. The nine pump is of a centrifugal type and is driven by a timing belt. It must create a pressure in the cooling system of about 1 atmosphere. The impeller is made of metal-ceramic, the pump shaft rotates on plain bearings, which must be lubricated from the factory with Litol 24 grease. It is not maintained during operation, and in case of failure, in theory, cannot be restored.

How to rinse SOD?

Flushing the cooling system with water

Although it is possible to flush the system with water, I would strongly advise against it. As I already said, it contains a large amount of impurities and salts that form scale. If there is no other option, then at least use distilled water. Flushing the cooling system using distilled water is done as follows:

Flushing the cooling system with water, acid and vinegar

Water with vinegar and acid is a little better than just water, because thanks to acids you can remove scale and partially clean the cooling system. In order to flush the system using this method, prepare: caustic soda, lactic acid and vinegar. The acid is added carefully and a little at a time; if you overdo it, you can say goodbye to the plastic and rubber parts of the cooling system. To completely remove scale and dirt, it takes 5-10 hours, during which it is necessary to periodically warm up the engine to operating temperature. At the end, all the liquid is drained and distillate is poured in, which is used for the final flushing of the cooling system.

Washing SOD using special chemicals

Specialist. means are the most effective and expensive option. However, the effectiveness of such a procedure is worth the overpayment. Cleaning products contain special cleaning agents that actively remove scale, grease, organic matter, etc.

Flushing specials products are divided into four types: acidic, alkaline, two-component, neutral.

The least popular are acidic and alkaline . Moreover, it is almost impossible to find them undiluted. This is explained by their aggressive effect on the entire cooling system, essentially plastic and rubber products.

Two-component products are very popular and in great demand. Their 2-component solution consisting of alkali and acid copes well with the task. Each of the components is poured into the radiator in turn.

Neutral cooling system cleaning products contain aggressive substances, such as acids or alkalis, and are used exclusively for preventive purposes.

Summing up

As you can see, there are quite a few ways and means to clean the cooling system and each of them has its own characteristics. If you do not want to spend money on expensive cleaning products, follow basic rules that will prevent the formation of plaque and scale. Namely:

That's all for me, thank you all for your attention and for visiting our

Guest_ntc_* 26 Nov 2007

I washed it with a special solution in a jar, added it to the system, ran it for 15 minutes (well, everything was as in the instructions), then drained it and rinsed it 5 times with distilled water, even after 5 times there was a slight sediment in the water, but the water was visually clear.

Torcon Nov 26, 2007

Some other car enthusiasts add water and pour two packs of citric acid, it cleans amazingly. But I was afraid to clean it in such a merciless way: the radiator honeycombs might become clogged with rust and then only replacement.

I just wash it with water, by the way I changed Eneos antifreeze to Valvoline, the car stopped overheating in the summer, it became quite warm in the car. Some strange things.

RadioFanat 29 Nov 2007

2 ntc — write down the brand of flushing. price. where did you get it? everyone is interested

Methods for cleaning the cooling system

There are the following options for cleaning the VAZ 2114 and 2110 system:

  • external flushing. This is a simpler method that does not require removing the engine. Using a water jet will get rid of dust, dirt and insects;
  • internal flushing. This type of cleaning is usually necessary if the coolant is water, which can cause rust and scale to form. This method is effective for eliminating these types of pollution.

Torcon Nov 26, 2007

Some other car enthusiasts add water and pour two packs of citric acid, it cleans amazingly. But I was afraid to clean it in such a merciless way: the radiator honeycombs might become clogged with rust and then only replacement.

I just wash it with water, by the way I changed Eneos antifreeze to Valvoline, the car stopped overheating in the summer, it became quite warm in the car. Some strange things.

RadioFanat 29 Nov 2007

2 ntc — write down the brand of flushing. price. where did you get it? everyone is interested

Lada 2109 Bright blue metallic › Logbook › Flushing the cooling system of a VAZ 2109

Hi all. It all started with the fact that my heater radiator was leaking, and after replacing it (I will write about the replacement in the next article), I decided to thoroughly flush the entire cooling system. What was ultimately purchased:

1. Antifreeze Dzerzhinsky A-40M EXTRA 10 kg. 2. Cooling system cleaner MANNOL 9965.

Now I will describe the entire process of my first replacement of antifreeze and flushing the cooling system.

I poured a flushing agent into the old brake fluid, started the car, turned the heater on as high as possible and let it run for about 20-30 minutes. After that, after waiting for the engine to partially cool down, I stocked up with cut-off plastic bottles and a basin for draining, and I also covered the generator so that liquid would not accidentally get on it. I unscrewed the drain plug on the radiator, placed a cut bottle and, by slightly unscrewing the cap of the Antifreeze tank, began to drain the old liquid. I explain that when you start to unscrew the cap on the tank a little, the pressure of the draining Antifreeze becomes stronger, and after the full half of the cut bottle is filled, you screw the cap on the tank back and the pressure becomes barely. When I drained it, I tried to make sure that it flowed out as little as possible, and that’s practically what happened))). After that, I screwed the plug back and began to drain the antifreeze from the engine itself. I also found the fluid drain bolt and unscrewed it with a 13mm wrench and also by unscrewing and tightening the tank cap I drained the antifreeze from there too. Of course, I had to drain it more than once; apparently the cooling system had not been flushed for a very, very long time.

When I cleaned the system with manol, the drained liquid was of this color:

After that, I started filling the cooling system with water and starting the car in the same way, warming it up, then draining and draining until I had more or less clear water in my basin.

The first flush with water, after cleaning the cooling system with manol. I took the photo in the evening, so in some photos the water may seem either dirtier or clearer

When I drained it the last time, the water turned out to be more or less transparent, this is the result I was trying to achieve

In the second and third photos, I drained the antifreeze only from the radiator, because... on the engine, I could not unscrew the drain bolt, and in the 3rd photo and subsequent ones I drained the antifreeze completely. After each fill of a new batch of water, I pressed on 2 hoses, on the hose that comes from the thermostat and on the hose that goes from the engine to the radiator, and I did this in order to expel air from the system.

After the entire procedure, the heater began to heat better, the car stopped overheating in the summer heat, otherwise previously it was necessary to turn on the cooling fan and the heater at 1st speed to avoid overheating.

In total, I had to rinse 9 times to get almost clean water. Even though I did this whole procedure and replaced the radiator with a new one, the side nozzles still blow barely warm air. Who can say anything about this? All peace and goodness.)))

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