How to replace coolant on a VAZ 2115i

01/26/2022 10 131 VAZ 2115

Author: Ivan Baranov

Coolant performs several functions in the operation of a car. The main tasks that can be accomplished with this substance are cooling in the engine operating system (injector) and engine cooling.

When the VAZ 2115 antifreeze is replaced on time, the temperature sensor will show a low temperature . In this article we will tell you how to drain antifreeze on a VAZ 2115 and how to refill it, and also describe the reasons for leaks and drops in the liquid level.

The main actions that a cooling lubricant performs.

1. Creating a low temperature in the operation of the gearbox, namely hydraulic fluid, which needs to be poured only into the automatic transmission.
2. Creating a normal and stable temperature during engine operation (injector).
3. Interior heating in winter. Filling with antifreeze keeps the car warm because it passes through the heater. Thus, the motor warms the liquid, and the fan carries it around the cabin.

Replacement in a VAZ 2115 car should occur once every two years or every 45 thousand km. After all, antifreeze, like any other substance, loses its qualities over time.

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Replacement frequency

The manufacturer prescribes three conditions for replacing the fluid (depending on what comes first):

1. The coolant is replaced every 80-100 thousand kilometers.
2. The fluid needs to be changed every 4-5 years, regardless of mileage.
3. If the color of the liquid turns brown, it needs to be replaced urgently. When the fluid loses color, its chemical composition changes, and it has a detrimental effect on the cylinder head and other parts in the cooling system made of aluminum.

How to replace antifreeze (antifreeze)?

To replace, we will need a basin, keys for “8”, “13”, “17”, distilled water, new antifreeze with a volume of 8-10 liters.

• Drain the old coolant.
• Flush the cooling system.
• Fill with new fluid.

Sources:

https://avto-idea.ru/remont/kak-zamenit-tosol-na-vaz-2110-skolko-litrov-tosola/ https://avtozam.com/vaz/2115/kak-zamenit-ozh/ https: //vaz-2110.ru/dvigatel/kak-pomenyat-tosol-na-vaz-2110-svoimi-rukami.html https://vaz-2114-lada.ru/2013/01/kak-pravilno-zamenit-okhlazhdayushhuyu -zhidkost-tosol-antifriz/

Step-by-step instruction

1. Before starting work, open the tap on the stove in the cabin. This is necessary so that during replacement the liquid comes out of the heater radiator.
2. Place the car on the pit. Next, unscrew the bolts securing the engine protection and casing. Wrench bolts for “10” and “13”. The location of the bolts is in the photo below.

Close the generator with a bottle and place a container to collect the liquid.

Unscrew the drain on the radiator and make sure that the fluid flows into the collection container.

In order for the liquid to come out faster, unscrew the cap of the expansion tank to allow air in.

Unscrew the bolt marked in the photo below to drain the fluid from the cylinder block cooling jackets. Before unscrewing the bolt, place a container for collection. We also recommend that you do not completely unscrew the bolt in order to collect all the liquid as much as possible.

Tighten the drain bolt on the engine block, as well as the plug on the radiator.

• Insert a funnel into the reservoir and fill the coolant to just above the level.
• Place a container to collect fluid under the hose that goes to the throttle assembly. Next, pressing on the hoses in the places marked below, expel the air from the system.
• Place and secure the hose to the throttle assembly. Next, add fluid to the level and start the engine. After warming up the engine to operating temperature, increase the crankshaft speed in jerks to 2-3 thousand (do this for 20-30 seconds). Stop the engine and let it cool. After cooling, add liquid according to the level if necessary.

The process of replacing antifreeze for VAZ 2113, 2114, 2115 is clearly shown in this video:

Replacing antifreeze

Owners of used domestic cars most often encounter repairs to the cooling system, and for owners of VAZ 2109, 2114 and similar models, this problem becomes almost constant.

Some of the malfunctions require partial or complete draining of the coolant. This process is quite simple, but relatively labor-intensive and requires little preparation. You can consider it using the example of a VAZ 2114 car, since in other models the scheme will be approximately the same.

Replacing antifreeze on a VAZ 2114 may be necessary if it is heavily contaminated with slag or if the cooling system breaks down. The main problems for which it is necessary to drain the liquid are:

• Clogging.
• Radiator malfunctions.
• Broken expansion tank.
• Burst of pipes.
• Pump failure.

If one of these troubles happens, then you need to know how to correctly change antifreeze on a VAZ 2114.

To do this, you will need an inspection hole, a clean canister and several liters of new coolant. Before starting work, be sure to wait until the engine has cooled down, otherwise there is a risk of severe burns.

After waiting for the liquid to cool, you must carefully open the cap of the expansion tank. Since the cooling system is under pressure created by the pump, abruptly opening the lid may cause antifreeze to splash out.

The expansion tank performs the function of maintaining the required level of coolant in the engine and on this car model it is the most vulnerable point, since it cannot withstand the created pressure and temperature of the engine.

Replacing coolant on VAZ 2113, VAZ 2114, VAZ 2115

Note! To change the coolant, you may need a helper!

When should you change the coolant? If you refer to the manufacturer’s instructions, then in this case he recommends replacing the coolant in three points, depending on what comes first:

Required amount of coolant for VAZ 2110

After a certain mileage and operation of the VAZ 2110 car, it is necessary to carry out a technical inspection, monitor the level of oil and coolant in the system. After a certain period of operation, all lubricants and coolants lose their original technical and operational characteristics and require replacement. Therefore, before replacing the coolant, you need to find out how much antifreeze is in the cooling system of the VAZ 2110.

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How to replace coolant on a VAZ 2113-VAZ 2115?

Merging: 1) First, read the “Important” section, which is located at the very bottom of the article.

2) Next, position the car so that its front part is higher than the rear, or so that they are on the same level.

3) Now with “AKB is a Rechargeable Battery”, remove the “-” terminal. (For how to remove the negative terminal, read the article: “Replacing the battery”, point “1”)

4) Next, open the heater tap by moving the heater control lever “Red Arrow” all the way to the right “Blue Arrow”.

5) Then remove the ignition module from the car in order to easily get to the drain plug “Indicated by the red arrow”, which is located on the engine cylinder block. (How to remove the ignition module from the car, see the article: “Replacing the ignition module”).

Drain antifreeze or antifreeze from the radiator

If you have engine protection, you need to remove it; it will get in the way. Then open the hood and unscrew the cap from the expansion tank.

Yes, one more important point, see if your cabin heater tap is open, if not, then open it so that during draining all the liquid drains completely and does not remain in the heater.

Don’t forget to place a container under the car into which we will drain the coolant. We unscrew the plug on the radiator to drain, it is located at the very bottom on the passenger side, but be careful that the stream does not splash on the generator, so as not to accidentally flood it, they say this happens.

We wait until everything goes away, after which we can move on to the next stage of draining the coolant from the engine.

How the cooling system works

The engine of a car is cooled with antifreeze with its forced circulation in a small and large circle. You can use water as a coolant, but doing this is highly undesirable; fill it only in an emergency.

The service life with water should be short-term; in winter, when freezing, the liquid will damage engine parts and cannot be done without major repairs or its complete replacement. At other times of the year, corrosion forms on metal parts, and rust deposits at the bottom of the radiator are extremely undesirable.

The cooling system on the VAZ 2115 is designed on the same principle as on other cars. It includes:

• expansion tank;
• pump (centrifugal pump);
• cooling jacket;
• thermostat;
• radiator;
• electric fan.

The radiator that heats the interior also belongs to the cooling circuit. Antifreeze passes through it, but it does not perform a cooling function.

The operating system starts working immediately after the engine is started, at the same time the pump operates and is driven by the timing belt. The pump circulates a flow of antifreeze throughout the system, while simultaneously cooling the internal combustion engine located on the cylinder block.

When idling, the engine reaches the required temperature, at which time antifreeze is supplied to the cooling jacket. Its function is to prevent overheating of the cylinders and combustion chambers in the block. This is the operating principle of a small circuit. When the temperature rises to 85 0C, antifreeze enters the large circle; the function of controlling the distribution of coolant is performed by a thermostatic device.

The thermostat is located on the cylinder block. The central part is the valve located inside. When the engine reaches operating temperature, it opens and distributes antifreeze to a large circuit. When decreasing, it works in the reverse order. The device on the VAZ 2115 is dismountable, you can remove the failed valve and install a new one. But experienced motorists recommend replacing the thermostat with a new one.

The main cooling function lies in the large circle. Its central element is the radiator. It releases heat into the atmosphere and lowers the temperature of the liquid due to oncoming air. The unit consists of a tube-tape aluminum core with horizontal distribution of antifreeze flow. In the lower and upper parts there are two pipes (outlet and supply) from the tank to the jacket.

When the temperature rises to 1030C, the fan is activated; it is triggered by a sensor located in the air filter. When the indicator decreases, it works in the reverse order. The electric fan stops working.

The expansion tank is responsible for replenishing the optimal level of antifreeze in the OS. The function of normalizing pressure is performed by the tank lid; it looks like a single block consisting of two valves. The first opens, releasing steam at a pressure of 140±10 kPa. The adjacent one is activated when the antifreeze cools down and bleeds air.

The tightness of the lid is a mandatory condition; failure of the valves leads to boiling of the antifreeze. If a problem is detected, it is necessary to check the serviceability of not only the thermostat, but also the unit on the tank plug.

Why does it flow

Before draining the old fluid and changing

it, you need to understand why it flows out of your VAZ
2115
. Sometimes this is quite difficult to determine. Try to look through all the pipes, there are several places where the element can leak.

We change antifreeze, flush the VAZ 2108-15 system

• Clamps - they may not be clamped well.
• The pipe itself, which can crack over time.
• Radiator due to mechanical damage.
• A pump or pump that wears out over the years in VAZ cars.
• Leakage from under the head.
• When the leak occurs directly into the car's cabin.

When any type of leak is detected, you first need to repair the area so that this situation does not recur, and then replace it.

Coolant drain options

You can replace antifreeze on a VAZ 2115 yourself, without removing the engine. The liquid will drain from the system, but will partially remain in the engine. The car has a drain plug at the bottom of the radiator, which greatly simplifies replacement. Remove residues from the engine through the plug on the cylinder block.

The second method is used for major repairs. After dismantling the engine, it is necessary to remove all antifreeze from it and flush the system. Drain the coolant through the radiator pipes and heater hoses, and at the same time unscrew the plug on the block.

Engine radiator drain

The next step in replacing antifreeze on a VAZ 2114 will be draining the cooler from the radiator. It is more convenient to do this on a viewing hole or a lift. In the lower corner of the radiator there is a special valve, which also brings owners a lot of trouble due to constant leaks. You can get rid of them using sealant. Before draining, it is necessary to prepare a clean container with a wide neck. You should open the tap carefully, as it is made of plastic and can easily crumble in your hands. Therefore, when performing this operation, you should play it safe and get a spare one.

If there is slight contamination, the liquid from the radiator can be reused, so the filled container must be put aside, first covered with something, avoiding debris.

Having completed this operation, you can begin replacing the radiator or expansion tank, but it is important to know that not all the coolant has been drained. For maximum efficiency, the cooling system operates in two cycles. Since a certain temperature is required for the best operation of an internal combustion engine, the cooling is configured in two circles:

• Small cooling circle.
• Large cooling circle.

What antifreeze to fill in VAZ 2115

A special antifreeze (TL) has been developed for domestic cars. It is significantly inferior in quality to imported products, but is preferable for the VAZ 2115. Antifreeze is produced in two types, G11 and G12. The choice does not depend on the type of engine (petrol or diesel). To replace, purchase antifreeze that matches the color and brand from the factory. You cannot mix or add coolant with different compositions and markings. For example, if the system is filled with green or blue, you cannot dilute it with red.

Is it possible to mix different fluids in the cooling system?

You should know that antifreeze is a type of antifreeze - it was specially developed for Zhiguli cars back in Soviet times. At that time, domestic antifreeze was not of good quality, and a better coolant composition for the new car model was simply necessary.

Car enthusiasts often ask whether it is possible to mix antifreeze with antifreeze. This issue is often discussed among car owners in real life, on various forums on the Internet. To be honest, they never came to a common opinion. One thing can only be said for sure - a catastrophe as such will not happen to the car. But still, it is not recommended to mix the compositions. It is better to adhere to the technical conditions and, for a certain car model, fill in the coolant that is recommended by the manufacturer for this brand of vehicle.

How to change antifreeze on a VAZ 2115

Allow the engine to cool completely before replacing. Raise the car or drive it into a pit, remove the protection from the bottom. The whole work consists of three stages: draining the waste liquid, flushing the system with water and refilling.

How to drain antifreeze from a VAZ 2115

Car maintenance by replacing the coolant mixture is a simple procedure. The main task is to remove old antifreeze. First of all, relieve pressure in the system by removing the cap from the expansion tank.

How to properly drain antifreeze from the block and radiator on a VAZ 2115:

1. Unscrew the ignition module. The unit is secured with three bolts.

2. Release the plug from the block. Use the key at 13.

3. Place a container under the block to collect antifreeze. When the liquid is completely removed, return the nut from the drain hole.

4. Unscrew the plug on the radiator. Pre-protect the generator from moisture.

5. Put on a rubber hose and unscrew the tap. If the passage hole does not allow liquid to pass through, the tap is removed completely.

After removal, return the plug to its place and rinse the system with water, it is completely ready for replacement.

Where to fill antifreeze in VAZ 2115

When the antifreeze is completely drained from the system, check the clamps on the pipes. They must be tightly tightened to avoid leakage. Fill the system through the neck of the expansion tank. To avoid traffic jams, pour antifreeze in a thin stream.

The plastic tank has minimum and maximum level limit marks.

1. During the filling process, press the radiator pipes with your hands several times. This procedure is recommended to remove air.
2. The container is filled to the maximum level. Cover tightly with a lid.
3. Start the engine at idle speed. When it warms up to operating temperature, press the gas pedal all the way down several times.
4. When the engine has completely cooled down, check the antifreeze level in the reservoir.

If everything went well, the amount of antifreeze will not decrease.

How to fill

When the old substance is completely drained, you can proceed to the second part.

1. Tighten all plugs.
2. Disconnect the hose from the pipe and fill with antifreeze. Fill in the liquid
3. Reinstall the hose and add more.
4. Tighten the plug.
5. Turn on the engine and let the car idle. This will remove all the air.
6. Turn off the engine. Check the level and sensor. If everything is in order, then put on the mudguard, tighten the fastening bolts, put the cap on the tank and close the hood.

Done, the replacement in the VAZ 2115 was successfully completed.

Coolant temperature sensor

Tips for replacing coolant

Several important recommendations when replacing antifreeze:

1. To prevent contact of toxic substances with skin areas, work with gloves and long sleeves.
2. Protect the generator from moisture.
3. Replacement is carried out only when the engine is cold.
4. Do not open the tank lid while the engine is running, as you may get burned.
5. After removing the liquid, the system is washed with distilled water until it comes out clean.
6. Curl new fluid to maximum level.
7. After replacement, the system is diagnosed for air locks. To do this, start the engine. When it warms up, turn on the stove. Hot air must enter the cabin. They try the pipes. When the cooling system is in normal condition, they are warm.

How to drain

To get started, stock up on all the necessary tools for the job:

• Key;
• screwdriver;
• container for draining;
• new fluid.

If your car has cooled down, then you can proceed to the first part.

1. Place the machine on a level surface.
2. Open the hood.
3. Remove the cap from the tank.

   
   Unscrew the cap from the tank

4. Remove the mudguard and unscrew the bolts securing it to the body.
5. Place a container for drainage and unscrew all drain plugs.
6. Now the liquid can be drained.