Drip stove radiator vaz 2110 DIY repair

In detail: the radiator of the vaz 2110 stove dripped; DIY repair from a real master for the site my.housecope.com.

Stove VAZ 2110 perhaps the most problematic and capricious mechanism in the entire car design. You can't do without a stove or a faulty interior heater radiator on a VAZ 2110, given our cold climate. If in the summer a non-working stove may not bother you, then with the onset of the cold season it often turns out that the stove on the VAZ-2110 is blowing cold air. Today we will try to tell you in great detail about the device, repair and replacement of the heater on the top ten. For clarity, we will supplement the text with photos and videos.

Let's say right away that the design of the heating system on the “top ten” is fundamentally different from what was on the old VAZ models. The most important feature and difference between the interior heater is that stove radiator VAZ 2110 and its fan is not in the passenger compartment, but in the engine compartment. This design has its advantages, for example, to replace the heater radiator or stove fan, you do not need to completely disassemble the front panel (dashboard).

Another important difference is the electronic control of climate processes in the cabin. For this, the so-called automatic heater control system (SAUO). Photo of the SAUO block below.

By the way, the SAUO unit on the “dozens” of different years of manufacture is different. Since 1996, 4 types of SAUO controller have been produced. This should be taken into account when buying a unit as a spare part. It is this device that controls the temperature in the cabin and the operation of the fan. The temperature can be set from 16 to 28 degrees.

But how does this miracle device work? There is a temperature sensor or a ceiling air sensor with a built-in (very small) fan for air circulation on the ceiling of the “dozens” cabin. It is this sensor that sends information about the real temperature in the cabin, and the SAUO unit gives a command to the micro gear motor (MMP), which, in turn, opens or closes the main damper, which is responsible for the access of hot air to the cabin. When the temperature in the passenger compartment changes, the ceiling sensor gives a new signal, the micro geared motor is triggered by turning the damper, closing or opening the hot air access to the passenger compartment. Thus, the set temperature is automatically maintained. Further photo of the diagram of the air ducts of the VAZ 2110 heater.

Video (click to play).

Many owners of "ten" complain that at some point the stove constantly blows cold air and no turning of the handles of the automatic heater control system can save the situation in any way. There can be a lot of problems and malfunctions. For example, the SAUO controller itself, the ceiling sensor or the micro gear motor, which simply does not open or close the damper, is faulty. Another reason is the air (airlock) in the heater radiator, which is simply not able to heat the air passing through it. Further schematic image of the heater device VAZ 2110.

Often the reason for the poor performance of the heater "tens" is stove damper vaz 2110... The flap may not close tightly or open well. The heater flap itself is made of plastic, which can deform over time and work poorly. Many car owners buy a metal flap and change it on their own. How to check the performance and assess the condition of the stove damper? Quite simply, remove the central air duct deflector and here it is! We look at the photo.

Then you carefully examine the damper, turn on the stove, turn the regulators on the SAUO unit and see if the damper works at all. How does it move, whether it fits snugly.If she does not respond to commands, then the problem may not be in her at all. For one thing, you can see if the lever for redirecting the airflow from the glass to the legs works.

It is quite simple to determine the operability of the stove fan by noise. If the fan motor burns out, then naturally it will no longer work. True, before rushing to change the stove fan, you must make sure that the fuse has not blown. As we wrote above stove fan VAZ 2110 located not in the cabin, but in the engine compartment. To get to it, you will need to remove a special apron that separates the engine compartment from the heater housing, the vacuum brake booster and the wiper mechanism. The photo itself is below for clarity.

So we got to the stove fan, removing the apron and the heater cover. By the way, next to you you will see a cabin filter, in the casing a little to the left. It must be pulled out and cleaned. If no one has changed the filter before you, for many years of operation it is seriously clogged with debris and interferes with normal air circulation, which is sucked into the VAZ 2110 interior.

The radiator of the “dozens” stove is located in the same place as the fan, that is, under the hood (see photo above). To remove it, you must first remove the fan from the heater casing. If you notice a strange smell in the cabin, lift the rugs, if there are puddles of antifreeze or antifreeze, then stove radiator VAZ 2110 drip. Although they may no longer hold the clamps ... in any case, you will have to disassemble and find out the cause of the leak. Next, we offer a couple of video clips demonstrating the process of disassembling, removing the apron, stove fan, cabin filter and heater radiator.

Video of replacing the old-style “dozens” heater radiator.

Video of replacing the radiator of a new type of stove.

By the way, when replacing the heater stove, you can use the opportunity to replace and cabin filter VAZ 2110, so that later it would not be disassembled all over again. This will help you feel the fresh air and warmth of the repaired VAZ 2110 stove in the cabin.

The heater radiator flowed and it was decided not to change, but still try to repair the old one. The initial opinion that the drip of the radiator itself was dispelled after parsing turned out to be burst plastic tank.

I decided to try to do this too. I straightened the aluminum and removed the tank, the crack turned out to be very large in length.

I scraped the crack with a triangular file, smeared the done deal with two-component glue, although I had to use glue for metal. it was he who was bought to seal the radiator, but it turned out that the plastic failed. Then he squeezed this whole thing with a clamp and left it for a day.

In the meantime, I decided to clean the radiator and took out the screw tapes from the honeycomb. Half of the honeycomb was clogged and had to be cleaned with some kind of ramrod.

I installed the tapes in place and a day later began the process of assembling the tank with a radiator.

I chose aquarium silicone for gluing the tank. strong to tear and withstands high temperatures. He smeared, connected and pulled off with duct tape to create constant pressure, and left in this state overnight.

A day later, I installed the radiator in place.

I have already covered 700 km. does not flow, heats up perfectly, dry and comfortable. Antifreeze is in place.

This article was contributed by Pavlo Dubina, many thanks to him for that!

One of the reasons replacing the radiator of the stove on the VAZ 2110 is the flow of antifreeze. Usually antifreeze runs out of the heater radiator or loose hose connections. Because without disassembling the motor shield the cause of the antifreeze leak not defined, so it is better to immediately replace the heater radiator with a new one.

Process removing and replacing the radiator can be traced in the documentation from the VAZ 2110 repair book. to replace the radiator of the stove, you do not need to remove the panel in the cabin, the entire replacement procedure takes place exclusively under the hood.

Heaters VAZ 2110 distinguish:

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Old-style heater (up to September 2003)
New type heater (after Sep 2003)

Procedure replacing the radiator of the stove of the old and new samples will not differ significantly, but I will tell you separately anyway.

So, we buy everything you need to replace the radiator (you will need at least 4 clamps) and take a short Phillips screwdriver with tweezers (they will help when installing hard-to-reach latches). It is important to choose a good heater radiator!

Image - Drip stove radiator vaz 2110 DIY repair

Drain the antifreeze:

You can drain part of the antifreeze from the engine block. Unscrew the cover of the expansion tank (so that the pressure drops) and unscrew the drain plug, which is located behind the ignition module (unscrew it and remove it to the side). About 4 liters of antifreeze should run out into the bucket that was previously substituted (if it is clean, then you can fill it again later).
And you can only drain through the expansion tank. We remove the hose from the stove and about 1 liter of antifreeze is poured out. Next, remove this rubber pipe (so as not to interfere) by loosening three clamps:

Further, depending on the heater, the replacement procedure is slightly different:

A new heater is attached to the body in the following places:

One screw in the middle at the bottom of the windshield
Two nuts above the exhaust manifold
One nut in the left corner (near the filter)

If there is a rear window washer fluid reservoir, then it must also be removed.
The air filter is pressed against the heater with a plastic cover, which is attached to 4 self-tapping screws, remove the filter.

The new heater consists of two parts, which are connected by 3 self-tapping screws. The air supply hose goes to the heater fan (it is bent with the letter “G”). If you look through it, you will see a large self-tapping screw, unscrew it and two more smaller screws from the front side of the heater.

We separate the heater into two parts, for this move the right side to the right as much as possible, and remove the left side like this:
With our left hand we take it by the left side, and with our right hand by the right and turn it slightly upward from ourselves and bring out the right side first, and then the whole part.

We remove the right side without much effort. Remove the steam hose through the hole in the right half of the bulkhead soundproofing.

The right side of the heater also consists of two parts, which are connected with iron brackets. We remove the staples and it will fall into two parts (there is a seal between them). We get access to the damper. Better to use a new, glued aluminum shutter.

Important points when assembling a new heater in the reverse order:

When installing a plastic shutter, it may be necessary to sharpen and adjust the shutter in place so that it moves effortlessly. It is also allowed to earn a little extra money at the aluminum shutter.
After installing the damper, set it by hand to the cold air position. In this position, the heater radiator will be closed by the flap. Move the temperature dial to the MIN position and turn on the ignition, it will start spinning and move to the desired position. Thus, it is easier to insert it into place, since both the damper and the gear will be in the MIN position.
Buy a double for the washer hose, because in the future, it will facilitate the dismantling and installation of the wind cover.

Video instructions for replacing the radiator of the VAZ 2110 stove (new sample)

To replace the heater radiator with your own hands take time:

Dismantle the heater VAZ 2110 - 2.5 hours
Install the heater in reverse order. it took already 4 hours.

Because it takes a lot of time to dismantle the engine shield, then together with the replacement of the stove radiator, it is recommended to perform other operations that also require disassembling the heater. (for example, to simplify the replacement of the air filter, to make noise insulation)

After we have assembled the heater and topped up the antifreeze, we check the operation of the stove.If the radiator pipes of the stove do not heat up, then there may be a reason - air lock in the engine cooling system... How to expel air from the cleaning room is described in the article on repairing a VAZ 2110 heater.

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The factory-set VAZ 2110 provides for the installation of a model "2110-01" heater. It has a separate system, consisting of a unit that is responsible for heating the air, and an air distribution system with air ducts.

In principle, the stove for a dozen should work stably, provide a comfortable temperature in the cabin, which happens if all components of the heating system are free from defects.

However, often at the most inopportune moment, when the driver and passengers need warmth, failures occur. Therefore, we will consider what malfunctions in the VAZ 2110 stove are most common, how to fix them yourself.

Before proceeding with the analysis of the reasons why there are problems with the stove, we will touch on the features of operation, which will allow to maintain a stable service of the VAZ 2110 heater for a long time:

in cold weather, especially in frosty weather, it is best to control the stove using two modes. First, having started the car, direct the regulator position “all to the glass”, and then, when the car is already moving, direct all the heat to your feet;
do not obstruct the nozzles through which the air is supplied. If there are carpets on the floor, the nozzles should be raised higher;
glass must be cleaned of dirt;
the air conditioner, if available, should be used when it is damp outside.

Heater circuit VAZ 2110

Let's try to formulate the main problems that can be expected from the heater:

the temperature of the stove is not regulated;
the ceiling sensor does not want to work;
the stove stopped working altogether, only cold air enters the salon;
poor flow of hot air to the legs and / or to the side windows;
the coolant level drops. Moreover, this can happen when it clearly flows from the radiator or pipes, as well as "secretly";
the stove works, but makes a lot of noise.

And now we will consider how to troubleshoot a VAZ 2110 heater.

If you are unable to adjust the temperature of the air supplied to the passenger compartment, then you need to look for the cause in the damper or in the control unit.
It is possible that the temperature sensor, which is located on the ceiling, next to the plafond, is out of order.

To check it, you need to turn the regulator to the right until it stops, then bring your hand to the air flow coming from the heating system. If warm air flows only when the regulator is in the maximum heating position, then the sensor itself (or even the regulator) needs to be changed.

If heat also goes in other positions of the regulator (in the red part), then the sensor is not to blame.

After that, you need to check if the damper is not stuck. They approach it through the engine compartment: remove the central deflectors, move the flap by hand. If you have to remove it, then it is better to replace the plastic one (it goes normally) with an aluminum one, which is not so prone to deformation and freezing.The most unpleasant thing is when the stove completely stopped working, it drives only cold air. In 90 cases out of 100, the gear motor is guilty, which is changed on the VAZ 2110 as follows:

Dismantle the wipers;

Remove the frill;

Three self-tapping screws securing the gearmotor are unscrewed with a Phillips screwdriver (you need a short one);

Unfasten the wires;

In place of the old gearmotor, a new one is put. To do this, it is better to ask the assistant to switch the regulator modes while you install this part;

They put the frill back, put the windshield wipers.

Often the reason for the poor performance of the heater "tens" is stove damper vaz 2110... The flap may not close tightly or open well.The heater flap itself is made of plastic, which can deform over time and work poorly. Many car owners buy a metal flap and change it on their own. How to check the performance and assess the condition of the stove damper? Quite simply, remove the central air duct deflector and here it is! We look at the photo.

Then you carefully examine the damper, turn on the stove, turn the regulators on the SAUO unit and see if the damper works at all. How does it move, whether it fits snugly. If she does not respond to commands, then the problem may not be in her at all. For one thing, you can see if the lever for redirecting the airflow from the glass to the legs works.