Replacing the radiator of the VAZ-2112 stove

Interior heating systems on different vehicles have a similar design. In a VAZ-21124 car, the heater functions as follows:

the stove control unit controls the set air heating temperature with an acceptable error of about 2 degrees;
Air heating for interior heating is carried out in the heater radiator. It has a standard design and is made of copper or aluminum alloys;
To supply air into the cabin, special deflectors are provided that regulate the direction of its flow;
On the heater control panel there are: a fan operating mode switch with sliders that control the heater dampers.

One of the most common problems with the heating system on the VAZ-2112 is its depressurization, which is characterized by leakage of coolant from under the central panel. One of the reasons for this is the failure of the radiator, in which case it needs to be replaced.

Aluminum VS Copper: which radiator to choose?

Many years of experience in operating radiators made of various materials on domestic cars (including the VAZ-2112), it was noticed that its performance is not affected by the material from which it is made. Both copper and aluminum devices heat equally well.

The only criterion when choosing a radiator is its originality, since only a serious manufacturer is capable of producing a quality product. Therefore, when purchasing a heater radiator, it is necessary to pay attention to this criterion.

So, where exactly is the radiator of the VAZ-2112 stove? In the design of the interior heating system, the radiator is located inside the heater housing, occupying a horizontal position in relation to the central panel.

Replacing the VAZ 2112 stove yourself

Replacing a VAZ 2112 stove yourself is a type of work that is the most popular repair with the arrival of cold weather. The thing is that during the warm period, the radiator, which is also called the stove, can wear out, but due to the fact that it is not in use, it is almost impossible to notice this, but when the heater is started for the first time, when antifreeze begins to spill, everything becomes clear .

If this is your first time encountering such a problem, then most likely you will need instructions for replacing the radiator, which we will present as part of this publication. You must understand that the VAZ 2112 was produced with two designs of heaters

, so in order to carry out the replacement, you will have to pay attention to the year of manufacture of your car. VAZ 2112 cars produced before 2003 are equipped with an old-style heater, and those produced in a later period were equipped with a new-style heating system.

How to replace an old-style heater on a VAZ 2112?

To begin with, we will look at the question of how to change the VAZ 2112 stove on cars manufactured before 2003

. To make it easier for you to understand the process, we will present the instructions in the form of a step-by-step guide.

1. First of all, you must drain the coolant from the car's heating system. To do this, you should unscrew the cap of the expansion tank and relieve pressure in the system. After this, disconnect the rubber pipe, as well as the heater hose. Move under the car and remove the drain plug, drain the antifreeze into a container that should be large enough - at least 6 liters.

2. Now, you need to remove the rubber hood seal, which is located near the frill.

3. Next, we begin to release the frill. To do this, unscrew the screw, which is located just below the main brake cylinder, as well as four mounting screws, which are located on the right side of the frill. After this, you should loosen the clamps that attach the wiring and hoses to the frill, disconnect the negative terminal and unscrew two more screws that are located on the left side of the frill. Now you can move the frill up; it is not necessary to remove it completely.

4. Next, you must remove the plastic windshield trim. To do this, you need to remove the five screws and two nuts that hold it in place.

5. Now you need to disconnect the power from the sensor, which is responsible for the antifreeze level, as well as the hose that removes steam from the expansion tank and the hose that is used for washing the windows.

6. Next, you must remove the windshield wipers, windshield trim, electric fan and heater housing clamps. This is done by unscrewing the mounting screws.

7. Now, you can remove the cabin filter housing and the fan housing, and then get to the clamps and hoses securing the radiator.

8. Pull out the old radiator, clean the seating area from dust and dirt, install a new radiator and reassemble the structure in reverse order. As you can see, the solution to the problem of the old-style VAZ 2112 stove not working is a fairly simple procedure and does not require complex equipment, although it will take you quite a lot of time. The main thing is to be careful and consistent.

We are replacing the heater radiator of a new VAZ 2112

As we said above, VAZ 12 series cars that were produced after 2003

, were and are being equipped with new-style heating systems. Replacing the radiator in them is carried out somewhat differently than described in the previous section of this article, therefore, we will present separate detailed step-by-step instructions for them, which should be useful to you.

How to remove and replace the heater radiator on a VAZ-2112 (old model)?

A leak of cooling fluid in the cabin is a direct prerequisite for the need to change the heating radiator, since it is already out of order.

Note that models older than 2003 have an old-style stove installed. However, towards the end of this year, the cars were already equipped with a new heater. Accordingly, they have some structural differences, and therefore are removed and installed differently.

Replacing the radiator on the VAZ-2112 stove:

We free the system from antifreeze by draining it through the hole in the power unit block or through the expansion tank. If you choose the second option, you must remove the ignition module. Next, remove the lid from the tank, and then uncork the drain plug. If there is no sediment in the coolant, that is, it is in a clean state, it can be reused.
It is necessary to remove the hood seal, which is located next to the frill.
The screw fixing the frill should be unscrewed, and then the screws securing its upper part should be unscrewed.
Loosen the clamps and remove all wires and hoses from the frill.
Disconnect the vehicle's power supply by removing the terminals from the power source.
On the left side of the frill there are two screws that must be unscrewed to remove the element. There is no need to remove it.
Remove the front cover.
You will need to remove the terminal (if any) from the liquid level control sensor in the system, as well as the steam removal hose from the expansion tank.
Remove the hose from the front windshield washer.
After unscrewing the four screws, you need to remove the windshield wipers with the windshield trim.
The stove fan is dismantled, as well as the mounting brackets for its housing.
The mounting screws are removed from the protective casings of the air filter and fan.
It is necessary to remove the front heater blower housing and the cabin filter housing.
The rear part of the fan shroud is removed.
The steam outlet line and the antifreeze supply hose must be disconnected, having first loosened their fastenings.
The heater core can now be removed.

Before installing a new radiator, it is necessary to clean its seat in the stove body. When assembling the heater in reverse order, it is very important to control the tightness of all connections and the correct location of the parts. Otherwise, the heater may simply not function, and then the entire described sequence of work will have to be done again.

Dismantling procedure

To remove the VAZ 2110 heater, you must:

Disconnect the minus on the battery;
Free the windshield frame from the cladding, sound insulation upholstery, lining;
Remove the stove fan;
Disconnect the vacuum hose;
It’s good if you get creative and remove the front air intake housing, which is not at all easy to do. If you can't get to its screws, you may have to remove the dashboard. After that, the screws securing the heater are unscrewed, it rises, and it becomes possible to remove the air intake housing;
Separate the hoses from the fittings;
Remove the rear heater casing;
After unscrewing the heater mounting screws (you can easily find three of them, and the fourth is under the soundproofing upholstery on the left), remove the heater, moving it towards the engine.

This article will tell you what to do if the stove does not heat well:

Replacing the VAZ-2112 heater radiator (new model)

The procedure begins with dismantling the stove, which is attached to the car body with two nuts on the side of the intake manifold, a screw in the windshield area and a nut near the cabin filter. It is also necessary to remove the rear window washer barrel.

The sequence of actions is as follows:

Remove the air filter.
Unscrew the screws from the outside of the stove.
The heater body, consisting of two halves (left and right), must be separated and the steam exhaust hose released.
Remove the old radiator, clean its seat, and then install the new element.
The right half of the heater should be disassembled, which also consists of two elements fastened with metal brackets. Now the stove damper is freely accessible, and if necessary, it can be cleaned or replaced.
The new heater damper must be in a position where the heater radiator is closed.
The temperature sensor is set to the minimum mode, after which the ignition is turned on. This is necessary in order to correctly install this sensor, since after this it must take its initial position.
You can reassemble the heater in reverse order.

After replacing the heater radiator, you will need to replenish the coolant level in the system and test the performance of the heater. If everything is done correctly, all heater elements are in working order, and cold air begins to blow from the deflectors in the cabin, which means that the system has become airy. After eliminating it, the stove will work as before, and maybe even better.

Why does the stove blow cold air in a VAZ-2110?

Using the handle, the driver can regulate the temperature of the air that comes from the stove.

It consists of the following parts:

an electric motor to which a fan is attached, designed to pump hot air;
radiator.
three dampers (for recirculating the air intake, blocking the heater duct and for controlling the heater);

Did you know? On new generation stoves, the radiator is installed without a tap, which is used to shut off the flow of antifreeze through it.

Auto repair school Articles, tips and tricks on do-it-yourself car repair and maintenance

The main reasons for replacing the heater radiator are:

a leak in the heater core and a decrease (or complete absence) of heat transfer from the radiator.

troubleshooting

If problems occur with the stove, first you need to determine what exactly caused the heater to fail to operate normally.

Cause

Your actions

Low antifreeze level

If the antifreeze in the system becomes less than necessary, the coolant circulation in the engine-radiator circuit stops. Try topping it up as over time there is less of it in the tank. If this doesn't help, look further for reasons.

It can form when adding antifreeze to the system. To clear the traffic jam, you need to slightly raise the front of your car and run the engine at idle speed for 10 minutes. If air was indeed present in the system, the plug will go away and all that remains is to add coolant

The fan rotates at a speed set by the step controller. If you can turn on the stove only at maximum fan speed, and the electric motor device does not work in other modes, then the most likely reason is the stove resistor. It should be replaced with a new one

At maximum speed the flow is weak

The reason may be the system of closing and opening the damper, that is, the tap. But most often, this problem results from contamination of the cabin filter. This can be determined by the musty smell of dampness. Replace the filter and the problem may go away

This is the most popular type of breakdown associated with the heating system on the VAZ 2110. Leaks can occur through the stove and faucet. The crane is a very vulnerable spot for dozens of all VAZ models. When they first started producing the ten, the crane was being installed. Then it was removed from the structure, and after some time it was modified and returned

Antifreeze puddle in the cabin

If you notice a puddle of coolant under the feet of the front passenger, and also smell an unpleasant odor, then you should check the radiator and tap. Plus, be sure to study the current condition of the pipes in the places where they are attached with clamps

The pipes on the VAZ 2110 have a limited service life. After about 3 years, they will begin to tan, which will certainly lead to the need to replace them. It is better to prevent leakage by replacing the stove pipes a little earlier than scheduled.