AND-70 Blog About radiator pipes for UAZ

Benefits of an autonomous heater

Some install an autonomous heater or a hair dryer, which compares favorably with a standard stove and the use of both front and rear heaters in Loaf, where an additional pump will still be required to improve heat transfer. But the choice is up to the car owner, who will decide for himself which path to take. An additional autonomous interior heater for the UAZ Loaf has several main advantages:

• For a gasoline loaf, there is no need to strongly heat up the power plant, since such engines start up without any problems even in severe frosts. In this component, gasoline is noticeably superior to diesel;
• Using a preheater in combination with a stove fan, which allows the heating of the passenger compartment to work, requires a significantly greater amount of electrical energy and fuel itself. At the same time, the efficiency of the heating itself is noticeably lower;
• Autonomous heaters are characterized by longer performance, maintaining the required level of heat in the cabin constantly. This is true for those who plan to use Bukhanka as a place to spend the night;
• Autonomous stoves or hair dryers can be installed in any convenient place in the car. There is no need to look for additional space in the engine compartment, to think about powering the stove fan separately or together with the heater, without starting the ignition.

The presence of an additional autonomous heater can sometimes allow you to completely abandon the standard heating system. It all depends on the operating conditions of the Loaf, as well as the installation and placement of the equipment itself.

Placement and installation

When it comes to location, there are plenty of options. This is influenced by the specific layout of the Loaf of each car owner. But practice clearly shows that most often additional heaters are installed precisely behind the driver, in the corner. Although some mount equipment in the center or in the luggage compartment. Think over this issue in advance so that later there are no difficulties with the operation of additional equipment. Installing the stove behind the driver's seat, you do not have to stretch the fuel lines and electrical wiring for a long distance. This prevents overheating and reduces the risk of fire. It is recommended to install an additional podium under the stand-alone hair dryer in order to slightly raise it above the floor level. So the heater will be able to work more efficiently and better heat the space of the Loaf entrusted to it. The exhaust is made standard, as provided for by the instructions.

The system's exhaust pipe is best tied to your vehicle's stock exhaust system. This will prevent damage to the tube when the machine is immersed in water, mud, snow and puddles during operation. Although this is not the final placement, you can come up with your own alternatives. At the same time, the control panel from the autonomous heater can be moved to the rear of the hood. Thus, passengers will be able to reach the regulator without any problems, and the driver himself will receive relatively convenient access to it. In this situation, the only remaining measure is the distribution of air ducts from the new heater. Here you can already choose the placement at your own discretion.

Element of the cooling system

The main elements of the cooling system of the UAZ Loaf 452 power unit are well-known parts: a radiator, a fan, a water pump, a thermostat, pipes, a water jacket and a temperature sensor. Also, part of the design is a heater.

So, let's consider what the main elements of engine cooling are, their structure and operation, as well as repair and refinement.

Radiator and fan

On UAZ vehicles, 3-row copper or aluminum radiators can be installed, which provide maximum cooling of the liquid. Since the operation of the elements is quite long, the cooling process of the power unit is not always the same as it should be.

In this case, this is due to the clogging of the channels inside the element. Often, regular cleaning does not help, and increased wear makes cracks in the tubes, which the owners actively seal, not wanting to buy new parts. The main purpose of the radiator is to cool the liquid that circulates from the engine with the help of wind flow.

The cooling system fan on the Loaf is forced, mounted on a pulley and runs constantly while the crankshaft is spinning. Many motorists upgrade this system and install electric fans, which are often turned on by the driver himself according to the temperature readings on the dashboard.

Water pump

Pump UAZ mechanical drive. The main purpose of the element is to smoothly circulate the coolant through the system. So, the water pump ensures the flow of fluid into the radiator for cooling and vice versa. A malfunction of this element can lead to the loss of the "cooler" and overheating of the engine.

Thermostat

The main structural element is the thermostat. It circulates the liquid and serves as a switch between the small and large circle in the system. To warm up the vehicle, the element is kept closed. Upon reaching 80 degrees Celsius, it begins to open, which ensures the circulation of fluid through the radiator.

The main malfunction can be considered a jamming of the element, which can lead to overheating of the motor, since, as practice shows, the thermostat is stuck in a small circle, and, accordingly, there will be no additional cooling and liquid flow through the radiator.

Pipes and water jacket

Branch pipes are a means of moving fluid through the system from the engine and its elements to the radiator and vice versa. Failure of these elements leads to the loss of "coolant", which, in turn, lowers the level of coolant in the system, and this is a direct path to overheating.

Water jacket - design features of the block head and cylinder block. It is through these holes that the coolant flows, which takes heat for cooling. With a long service life, especially on water, corrosion can form inside the walls, which will lead to leakage and loss of fluid.

temperature sensor

The temperature sensor on the Loaf is not the same as most motorists are used to seeing. This is an old-style element that does not include an electric fan, since a forced system is installed here, but simply displays temperature indicators on the dashboard.

How to Remove a Loaf Radiator

Repair, modernization or replacement of the stove with a UAZ 452 involves its removal. For a large number of car models, this operation cannot be called simple, since it requires complete or partial disassembly of the torpedo.

In our case, this will not be required, since the heater can be accessed from the engine compartment. We describe the sequence of actions on how to remove the stove on the UAZ 45:

• we de-energize the car (by removing the negative terminal of the battery);
• drain the antifreeze by unscrewing the drain plug on the main radiator. Some models can be equipped with radiators that do not have a drain plug (the designers felt that it was enough to have one on the power unit). In this case, you will have to loosen the clamps and remove the pipes, which tend to stick to the fittings over time, so we do it carefully so as not to damage the hoses;
• since only part of the antifreeze will merge in this way, we are looking for a drain plug on the bracket of the stove itself (where there is a supply of pipes), unscrew it too;
• we dismantle the air ducts intended for blowing the windshield;
• unscrew the mass from the body of the stove;
• remove the glass washer reservoir, which will prevent the removal of the radiator housing;
• now you need to unscrew the four M6 bolts with a 10 key, tightening the tabs of the heat exchanger housing. To do this, you will need to dismantle the insulation (near the tap that switches the fuel supply path from the gas tanks). Since they are located in a hard-to-reach place, you may have to suffer a little for this. But if you have dealt with auto repair before, then you know that this is a characteristic feature of such work;
• now you can go to the salon to dismantle the heater control panel. In principle, if you do not plan to change the stove, then you can limit yourself to removing only the buttons (new heaters come with the panel), but it is better to remove it - it will be much more convenient to re-mount the device later;
• turn off the heater electric fan power supply chip;
• we dismantle the additional resistance responsible for switching the speed of rotation of the fan impeller;
• loosen the clamps and remove the pipes of the furnace radiator itself;
• now you can remove the heat exchanger itself.

We are sure that during this procedure you will repeatedly remember with a kindly quiet word the designers who forced you to repeatedly take the poses described in the ancient Indian epic "Kama Sutra".

Be sure to vacuum through the air ducts (if possible), as there is probably a lot of debris accumulated there.

Since the old-style UAZ 452 stove radiator, even when restored and cleaned, is unlikely to work better than originally, it is better to replace it with a more productive one. The most popular options are heaters from VAZ, as well as the NAMI-4 product, which by its design is best suited for a large number of UAZ car models. Therefore, we will describe the modernization of the stove using the example of this particular heat exchanger.

UAZ 452 stove radiator

Structural elements

Like the rest of the car, the loaf's cooling system is military-style simple and reliable. It includes the following elements.

1. 1. Coolant radiator: necessary to transfer the heat of the heated liquid to the atmosphere. In the production of these units, materials such as copper and aluminum are used. According to their design, radiators are divided into tubular, honeycomb and lamellar. Most often, manufacturers install tubular models on cars. They consist of horizontally arranged tubes that pass through thin plates soldered on top and bottom. These plates make the device rigid and increase its heat dissipation. In plate radiators, liquid circulates through paired plates, which are soldered to the reservoirs of the device. The cooled air is passed between the twin plates by means of a fan. Plates to cover a larger area are made wavy. The core of honeycomb radiators are horizontal tubes through which air cooled by liquid from the outside passes. At the top of the tank of the unit, a neck is soldered, which is closed with a plug and nozzles. They are needed to connect the hose that brings the coolant to the radiator.
   2. Oil cooler: serves to cool the oil with air. The device is optional and is designed for powerful engines.
   3. Grille: serves to protect the radiator from hypothermia, overheating and ingress of various objects.
   4. Heater radiator: in its structure, it is a reduced copy of the coolant radiator, it is installed in the passenger compartment, where it transfers heat.

This is what the radiator fan looks like

1. Fan: Increases the airflow that cools the liquid inside the radiator core. The main elements of the fan are the impeller and blades. You can set the blades in motion in different ways.Mechanical, installing a pump and a fan on one axis. In this case, the latter works continuously, which entails the consumption of engine power. In modern schemes, this method of installing the unit is almost never used. The fan connection goes through the coupling. In this case, the unit turns on only after the engine reaches a certain temperature. The temperature sensor is responsible for turning on the fan. Most often, the fan is equipped with an electric motor. Such a system allows you to adjust the frequency of its rotation.
2. Centrifugal pump: carries out the forced movement of fluid through the system. The pump consists of an aluminum casing, impeller and stuffing box. When the impeller rotates, a centrifugal force appears that enters the center of the pump housing, while the coolant leans back against the walls. The stuffing box prevents fluid from flowing out instead of the shaft exiting.
3. Expansion tank: takes in the excess formed during expansion from heating the liquid. Through this tank, coolant is added to the system.
4. Thermostat - temperature sensor - a device that controls the temperature inside the motor.
5. Engine water jacket - cavities inside the unit through which liquid circulates to cool heated parts.
6. Antifreeze is an engine coolant that can be used in sub-zero temperatures.

Heater UAZ Loaf

A car is made up of a large number of components. Any of them require very high attention. Thanks to this, drivers should look after the state of their own "iron horse". The issue of preparing the car for the winter period is very important.

The presence of a well-thought-out heating system plays an important role here. Let's talk about it in the UAZ "Loaf".

This system is important, first, to maintain a normal temperature in the cabin, regardless of the season, for air ventilation in the middle of the car.

On most of the "loaf" models, a heater of very high power "N-1" manufactured by NAMI was installed.

Design:

The heater includes the following elements:

• Heating device.
• Fan.
• Special device for air distribution.

There are two key operating modes:

1. With clean air.
2. When recirculating streams.

The second mode involves a very high temperature in the cabin. To do this, close the air intake, and then open the damper. In the first mode, the actions are performed in the reverse order.

A specialized unit controls the entire system. A tap is used for adjustment. The new design, built on increased circulation of flows and the use of liquid in the heater, allows the interior to warm up faster.

It is necessary to remember about blowing glass. In another case, this will lead to their coating with ice or fogging. The driver and passengers will feel discomfort.

If moisture penetrates, then it is removed through the air intake. It uses a docking device.

Often, motorists encounter cases when the heater (stove) does not perform its own direct functions, does not heat. What could be the reasons?

• The presence of damage in the channels through which air passes.
• Antifreeze is leaking.
• Clogging of the system, due to this unsatisfactory temperature.
• The faucet on the stove leaked.
• The valve responsible for protecting the motor burned out.

How to change a used stove with your own hands? What will be needed for this? Everything can be done using the following method.

1. Drain all antifreeze and disconnect all wiring.
2. Separate the console from the shield. We remove the heating unit, the air intake hatch, remove the seal, then clean the recesses.
3. We try on the air filter, we drill holes no more than 3.2 mm in diameter.
4. We apply a large layer of sealant to the place of the installation process. We install the case and mark. We return the filters from the cabin to their place.
5. We install a new heater in the cabin, fastening it with studs and nuts "M-6". We mark the node, then install the block console. We mark the entire structure with screws.
6. Next, we connect the control rod and fasten it. We connect pipe sections containing antifreeze to the assembly and mark them with specialized clamps. Then we put the blower channels for the windows.
7. Summing up, we connect the electrician, fill the system and check how it does not stop working. In case of breakdowns, you need to check the entire system again.

Summarizing

The heating system of the UAZ "Loaf" car is quite ordinary in its design. If you do not check its work in a timely manner, ultimately, the owner will need to spend cash on a car service.

Replacement

Now we’ll talk about how you can change the old stove equipment to UAZ Loaf on your own, and install a new and more productive stove in its place.

1. First, all antifreeze is drained from the system. If you plan to reuse it, it is better to provide a clean container for draining.
2. Drainage is carried out by disconnecting the pipes through which the cooling liquid flows from the heating unit. At the same time, the blower tubes are dismantled to heat the windshield of the Loaf.
3. Be sure to disconnect all existing wiring. It is better to mark it or write down which wire is connected where, in order to simplify the task of reassembly.
4. The next step is to disable the control panel console. Dismantle the heating unit, the air intake hatch, seals and devices responsible for controlling the interior loaf heating system.
5. After the manipulations in the air intake box, you will see holes. They should be drowned out with improvised means.
6. The groove through which the rubberized hatch seal passed is cleaned of dirt and remnants of the old sealant. Before applying a new sealant or sealant, the groove surface must be degreased.
7. Measure the air filter housing to your air intake. 8 holes are made in the metal around the entire perimeter of your case. The hole diameter should be 3.2 mm. Choose an appropriate size drill.
8. For now, the filter housing can be set aside. Get rid of any remaining metal chips after drilling, and apply a good coat of universal automotive sealant to the installation site. It’s not worth saving on sealing, otherwise water will enter the cabin during the operation of your UAZ Loaf. Then insert the air filter housing, tighten all the screws. If excess sealant comes out after installation, simply remove the excess.
9. Replace the cabin air filter there.
10. The equipment of the new heater is fixed with a pair of studs and M6 nuts. Fix this assembly, and then install the plastic console of the control unit. Here you will need to make a hole in the right place in the same plane with the shield. The control console is fixed with self-tapping screws.
11. Connect the rod used to control the stove faucet, fix it in place with a bracket. Connect the antifreeze supply pipes and secure them with clamps.
12. Put in place the air ducts intended for blowing the windshield, which helps to prevent it from fogging during the operation of the Loaf.
13. It is possible that the pipes that come with the heater will have to be bent a little for a more convenient installation. Working in Loaf is not very convenient, but you can get used to it.
14. The process is completed by connecting the power supply.The heater power cable can be connected through a wire that is used to operate additional devices. The mass is fixed on the body or on the breaker bolt. That is, the surface for fixing the mass must be metal.

In fact, you just have to fill the system with antifreeze, expel excess air and try out the new stove in your UAZ Loaf.

The Loaf car, despite its advanced age, continues to be successfully operated on domestic roads. At the same time, craftsmen come up with more and more new solutions to modernize and improve this machine, since many ready-made spare parts, systems, components and parts simply do not fit or function extremely poorly, failing literally after a year of operation. The problem of a non-working stove on the Loaf can be solved. To do this, you need to find the source of trouble. In the best case, the performance of the heating system is restored by replacing or repairing some components. But when the stove finally breaks down and does not want to work properly, the only correct solution is to completely replace it.

Equipment replacement

If you decide to replace the heater yourself, you should first familiarize yourself with the scheme of the UAZ Loaf stove for connecting the electrical component. Mounting the equipment itself, fixing it in a conditional engine compartment located inside the car, is not difficult. But even here certain rules and recommendations should be followed. The process will be considered using the example of using NAMI equipment, which is characterized by better performance, and also boasts the presence of a cabin filter, which is not in the standard Loaf heater.

• The first step is to drain the antifreeze from the system, and also disconnect all existing wiring. To make it easier to reassemble and connect, all your steps can be recorded or marked with wires, pipes and hoses;
• It is required to disconnect the console from the shield, then remove the heating unit, remove the air intake hatch, remove the seal and thoroughly clean all the openings that have opened;
• Take measurements under the air filter by attaching its housing to the surface. Next, make a few mounting holes. Just do not use a drill with a diameter greater than 3.2 millimeters;
• At the installation site, apply a coat of a quality automotive universal sealant that is resistant to moisture and sudden temperature changes. Make the layer big enough. Install the filter housing and fix it. The filter itself can already be inserted into its seat;
• A new heater is installed in the salon. It is fixed with studs, nuts and an M6 bolt. Fasten everything as securely as possible;
• Then the console is installed, the entire structure is mounted on self-tapping screws;
• Then you can start connecting the control rod and fixing it;
• Connect all pipes through which antifreeze passes. For reliability, it is recommended to tighten them with clamps;
• Do not forget about the channels that allow you to blow the windows, avoiding fogging during the operation of the car in conditions of high humidity or precipitation. Windshields should be on every car. Whether it's the latest generation Mercedes or the good old UAZ Loaf;
• The installation is completed by connecting the electrical component. It has its own connection scheme, which should be considered separately.

In fact, there is nothing particularly difficult in changing the standard heating system at Loaf, and installing more efficient and productive equipment in place of the old stove.

Wiring diagram

The system will not be able to work and heat your Loaf if it does not receive power. There is a special scheme for connection.By acting consistently and carefully, you will be able to power the new stove without outside help and enjoy the efficient operation of the heater.

• First, choose a place to place the mass. The black wire is responsible for ground. It is fixed on any metal surface convenient for you. It is best to do mass on the body;
• The positive wire is next. When connecting it, first disconnect the minus from the battery so that the machine is not energized during the work;
• Plus, it is recommended to enclose in a corrugated shell. Then the wire is pulled to the safety block, that is, to the block on the Loaf;
• Please note that there are 4 fuses on the car in its block. The last, that is, the fourth, is constantly energized. You should connect to any of the first three. Only make the connection from above, in front of the standard fuse in the block;
• In principle, this connection of the electrical circuit can be considered complete. Be sure to first check the operability of the furnace equipment.

It is safe to say that the heating system used on UAZ Loaf vehicles has a fairly simple design and layout.

Therefore, experienced motorists who are accustomed to doing maintenance, repairs and some modifications with their own hands should not have any problems understanding the Loaf heater. But it is extremely important to constantly monitor its performance, carry out preventive measures, monitor the condition and amount of coolant. Pay particular attention to the weakest areas of the stove.

The owners of Loaves themselves include regular faucets to them. The faucet often turns sour, jams and leaks. This is due to the long downtime of the faucet, which drivers simply forget to open periodically for purely preventive purposes.

Equipment selection

To improve the efficiency of the furnace equipment at the UAZ Bukhanka, it is required to replace the standard device that has failed or does not perform its functions well, to put a new stove. For some cases, a fairly good solution would be to adapt the analogue of the stove from the VAZ to the Loaf from the UAZ. But here you need to prepare for the fact that you will have to redo the design somewhat, make some changes, change the crane, etc. That is, you can do the job, but this is not the easiest and best option. An additional heater is also installed in the rear of the Loaf, which also allows you to warm up the entire cabin much faster and more efficiently, without depriving the driver and his passengers in the front and rear of the vehicle. In practice, in relation to the UAZ Loaf, the choice of equipment is quite modest. Here it is worth starting from your own preferences and financial capabilities.

• KITB. Good quality equipment. But for some reason it did not gain great popularity among the owners of Loaves;
• US 4. Currently the most optimal option for a complete replacement of the stove in Loaf. Not very cheap equipment, but it has a high degree of efficiency and productivity;
• NAMI 7. In many ways similar to the previous version, but has a slightly worse adaptation to the Loaf. Among the two NAMIs, it is often NAMI 4 that is chosen;
• System from VAZ. The manufacturer, represented by AvtoVAZ, offers heating systems that, if desired, can be integrated into the design of the UAZ. But the work involves a certain modernization and design changes, which requires additional financial costs. Plus, it complicates the work of replacing. If you have the same NAMI 4 heater, buying a VAZ system is not particularly profitable.

Here, each car owner must make his own choice. Doing the installation yourself or asking for help in a car service, the question is purely individual.

Cooling and heat supply system of UAZ wagon assembly with ZMZ-4091 Euro-3 and ZMZ-40911 Euro-4 engines.

Cooling and heating system for wagon cars UAZ-374195, UAZ-396295, UAZ-396255, UAZ-390995, UAZ-390945, UAZ-220695, UAZ-330395, UAZ-330365, with injection engines ZMZ-4091 Euro-3 and ZMZ -40911 Euro-4, liquid, closed, with circulation of the forced type of coolant.

The cooling system for wagon cars UAZ-374195, UAZ-396295, UAZ-396255, UAZ-390995, UAZ-390945, UAZ-220695, UAZ-330395, UAZ-330365 includes:

- Channels for the passage of coolant in the cylinder head. - Inter-cylinder channels for the passage of coolant in the cylinder block. — Heater of the cooling system. - Water pump. - Cooling fan. - Fluid coupling for cooling system fan drive. - Expansion tank. — Two-valve thermostat.

- Coolant temperature gauge.

- Coolant thermal converter of the engine control unit. - Drain plug of the heater. - Drain valve or cylinder block plug. — Throttle device heating hoses.

— Connecting pieces of a pipe and hoses.

Structural features

UAZ Patriot is equipped with a liquid-type heating system, which is part of the engine cooling system. The main role of heating is given to the stove radiator, which is located in a special plastic case located under the center console. The heating and cooling systems of the engine are interconnected with rubber hoses, and they are separated by a tap and dampers. Below is a general diagram of the interior heating structure.

This is how the process of coolant circulation in the heating system of an SUV looks like. Heat exchangers of heaters are shown, from which two tubes are removed. One tube is a supply pipe through which heated antifreeze flows from the engine. This antifreeze passes through the heater core and thereby warms it up. The stove is not only a heat exchanger, but also a centrifugal fan operating in several different modes. With the help of a fan, air is forced through the radiator, it is heated, and then it enters the cabin through special air ducts. The cooled liquid from the heater radiator returns to the engine cooling system through a special outlet hose.

The design of the heater provides for the installation of a valve, with the help of which the hot air supply to the stove radiator is shut off, and, therefore, to the interior of the Ulyanovsk-made SUV. After all, the use of the stove in the summer is not relevant, so the engine cooling system is divided by a special heater tap.

Air ducts and heater control unit

An electric pump is installed in the design of the heater, which is designed for the speedy run of the coolant through the internal combustion engine cooling system. In this case, literally 2-3 minutes after the start of the engine, warm air is supplied to the passenger compartment. Such a heating system is the best adaptation, but it also has its drawbacks. More precisely, there is only one drawback - it is the impossibility of heating when the engine is turned off, which makes it necessary to periodically start the engine to warm up the interior of the body.

UAZ 3163 cars manufactured in Ulyanovsk until 2012 are equipped with one heater, but depending on the configuration, they can have two stoves. Below is a schematic representation of the design features of such a unit.

The second stove is most often located under one of the front seats or between them. The auxiliary heater delivers warm air not only to the front passenger and driver, but also to rear passengers. The presence of two heaters is not in vain, because the UAZ Patriot has an impressive interior volume, which is problematic to warm up with the help of one heater. Therefore, most SUV owners install

Heating and ventilation scheme

So, we examined the principle of operation of the heater on the UAZ Patriot. Now consider how the flow of warm and cold air into the car interior is carried out. To do this, you can use the diagram, which shows all the main structural elements of the device in question.

Approximate air flow path

Number 1 shows a blower fan, through which cold air enters the heater system. If the supply valve is open and the coolant circulates through the system, then radiator 7 heats up. The air blown by the fan, passing through it, warms up and enters through the air ducts into the car interior.

At number 4, a damper is shown, with the help of which the air duct is blocked for heating the legs. The design of the device under consideration also has a special damper 8, with the help of which the air duct to the chamber with the radiator is blocked. Thus, the air blown by the fan immediately enters the air ducts. Damper 8 on the car is presented in the form of a regulator on the center console. The controller is on the left in the photo below.

Summing up, it should be noted that the interior heater is a network consisting of important devices. If one of the components of the heating structure fails, the functioning of the stove is disrupted. In this case, you will need to find a malfunction and fix it, which is quite easy to do on your own. But you can learn more about the types of SUV heating malfunctions and the replacement of component parts from this site.

How often does your Patriot break down?

Poll Options are limited because JavaScript is disabled in your browser.

Finally

The heating system of the UAZ "Loaf" car is very simple in design. If you do not check its work in time, in the end, the owner will have to spend money on a car service.

Everyone understands perfectly well that Loaf is an echo of the past. At the same time, the car continues to be actively used at the present time. Its technical characteristics are far from perfect. They have not been perfect since the introduction of the model in the 60s of the last century, and especially lagged behind the current auto industry. Many owners of this miracle of Soviet-style engineering complain about the stove, which does not work well and sometimes even heats the driver with the front passenger poorly. What can we say about the people in the cabin. The standard Loaf provides for the use of a very weak and inefficient stove behind the driver, which was assigned the function of heating a huge body space. To be warm, you have to wrap yourself in warm clothes, put on felt boots and other heaters. Or go the other way by installing an additional stove with a sufficient level of performance in the UAZ Loaf.