Thermostat operating principle
The thermostat consists of a housing and a thermoelement. The main role is played by the thermoelement. The thermocouple is built into the housing and covers one of the holes in the thermostat cover. When the temperature reaches 85 degrees, the thermoelement opens.
Direct work on the car is that when the thermoelement is closed, the coolant circulates in a small circle, bypassing the engine cooling radiator; as soon as the coolant temperature reaches 85 degrees, the thermoelement opens and coolant circulation begins in a large circle through the radiator.
So during the entire operation of the engine, the thermoelement opens and closes a huge number of times.
Possible problems
Over time, the thermostat of a Priora car wears out and can be damaged. Since every time the car is started it is put into operation, the more often the car is in working condition, the more it is susceptible to breakdowns. As a result, it stops changing position and, in a broken state, takes either an open or closed position. This can be affected by mechanical damage, as well as loss of thermostat properties when the device ceases to control the temperature. It is possible that the valve will not close completely due to damage to the rubber gaskets. It is dangerous to operate such a car, so if it breaks down, it is recommended to replace the thermostat on the Priora with a new one.
The Lada Priora has 16 valves; when the device is not working, the following symptoms are noticeable on the car:
When the internal combustion engine constantly overheats, although the device is operating in normal mode, it is possible that the coolant is not passing through the radiator.
Due to coolant leakage, the device stops responding to temperature changes, and because of this, the engine will take much longer to warm up. If coolant gets on the element responsible for temperature control, the valve will open a little earlier and because of this there will be an oversupply. Thus, the cooling system may break down, and the engine will operate at higher speeds.
If the internal combustion engine starts to stall, then due to constant vibrations the coolant can come out and because of this the valve stops functioning.
Checking the Thermostat
Most often, drivers notice a thermostat malfunction during the cold season. Since a car engine at low temperatures cannot heat up to operating temperature. Based on the fact that the engine temperature is below normal, the heater will not be able to heat the interior to a comfortable temperature.
The thermostat is checked on a cold engine.
We start the engine and touch the lower radiator pipe. It should be cold, not warm, but cold is very important. When the temperature reaches 85 degrees, the lower pipe should become hot. If the check on your car shows the opposite, then the thermostat is most likely faulty.
The thermostat will also be faulty if, when starting the engine, after some time the lower radiator hose becomes warm, then most likely the thermocouple is jammed or does not completely close the large circuit.
Causes of malfunction
There can be any number of reasons why a thermostat fails, but the main, most common ones are:
- scale;
- corrosion;
- dirt;
- poor quality coolant;
- spent resource.
Most often, the listed factors lead to the fact that not the entire thermostat fails, but its sensitive element, which is a sealed cylinder filled with a special wax-based mixture with a movable rod.
When heated, the mixture melts and expands, pushing the rod forward. This, in turn, pushes the valve, which closes and opens the pipeline. Corrosion, scale and dirt, settling on the moving parts of the thermostat (rod, valve), interfere with their normal operation, or even immobilize them.
Replacing the thermostat
To replace, you will need to drain the coolant.
Care must be taken to carry out work only on a cold engine to avoid burns.
Replacement Tool:
- Head or key set to “13”;
- Coolant 5 l;
- Clamps 50 mm;
- Hexagon on "6"
- Screwdriver “+” and “-”
Work process
- We remove the air filter box by unscrewing the clamp from the MAF sensor with a screwdriver and removing the chip from it. The box is held on by rubber clamps; in order for the box to be removed, you must forcefully pull it up.
- Drain the coolant. To do this, use your head or a key set to “13” to unscrew the plug on the cylinder block and drain the liquid into a container.
You can use old fluid only if it is clean; it is not recommended to refill dirty coolant.
- Loosen the front clamp of the large circle pipe on the thermostat cover (lower pipe from the radiator) and remove it.
- Loosen the rear clamp of the pipe on the thermostat cover (from the water pump tube) and remove it.
- Unscrew the 3 bolts securing the thermostat cover to the body with a hexagon to “6” and remove it.
- Install the new thermostat cover in reverse order.
- If the pipes are still old, it is recommended to use sealant to avoid coolant leaks.
After assembly, fill in the coolant, start the engine and let the car run for a few minutes, after which we check the coolant level again. Top up if necessary.
The thermostat replacement process is complete, there is nothing complicated about it. We hope our article was useful to you.
How to check for functionality
If all the described actions are not enough to determine the condition of the part, you can resort to experiment. As written earlier, to start working the part you need to feel the temperature of about 93-95 degrees. Why not replace the coolant with water?
The experiment can be carried out anywhere there is a kettle. After pouring approximately 300 ml of boiling water into a cup, you will have to wait 2 minutes, and then lower the “test person” into hot water. If it is working, then you can clearly study the principle of its operation. The rod of the part will begin a kind of movement, and the valve will rise to open the fluid communication through the large cycle.
Replacing the thermostat is not the easiest repair operation, but it is necessary so as not to “boil” in a traffic jam. It all depends on the choice of part and priorities. If you are too lazy to change it on time, engine wear will increase and, accordingly, its life will decrease.
Video on replacing the thermostat
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Category: Life hacks, Personal experience, Repair, Tuning
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Program of events
During the family holiday, about 60 venues will appear in Luzhniki, and this does not include recreation areas and food courts. They will be open from 10:00 to 19:00. Visitors will be able to dance, play sports and enjoy good music. Admission to all events is free.
Photo: Mikhail Frolov
The sports program alone includes over 40 competitions. There are also street activities - streetball, workout, parkour, freestyle, and the usual track and field races, push-ups and wrestling. You will also be able to throw darts at darts, take part in a drone race, show off your yoga skills and become part of a dance festival.
Photo: Kristina Brazhnikova
Among the major competitions that will take place at Luzhniki on City Day are the Russian Beatbox Championship, the final of the Archery World Cup and the large chess festival “Moscow Blitz” with the participation of the world’s leading grandmasters.
The program also includes performances by the Russian national figure skating team, a mini-football tournament among bloggers, a mass tournament “Football 2x2” and a match between the teams “Chertanovo” (Moscow) and “Neftekhimik” (Nizhnekamsk).
One of the most crowded venues will be the Moscow Fitness Fest, which is organized by the popular trainer in Moscow Dmitry Yashankin. The program includes lectures, seminars, open training sessions, and guests include stars, bloggers and champions. For example, Natalya Sevastyakova will give everyone advice on balanced sports nutrition. And at the Bupasteam site there will be demonstration boxing training in an open ring with the participation of Alexey Papin, Artem Oganesyan and coach Andrey Bupas Ivichuk.
There will be a separate creative area for children, which will include a competition for drawings with chalk on asphalt on the theme “We draw sports!” Professional instructors and animators will work with the children
An important component of the holiday will be art and photo installations, numerous swings, climbing frames, game modules, climbing walls, giant construction sets and poufs
Also at VDNKh there will be a special pavilion as part of the project “Helping parents in choosing a sport for their children,” where volunteers will tell about the city’s sports institutions and help them sign up for classes.
Photo: Kristina Brazhnikova
Weight matters
A car disk is a simple flywheel mounted on a hub. To set it in motion, you need to expend a certain amount of energy, the source of which is fuel. And the greater the mass of the wheel, the more fuel will be required to spin it. But it is much more difficult to stop the wheel when its rotation speed is very high. At that moment, a very large load is placed on the braking system. Therefore, not only the comfort and controllability of the car, but also the safety of passengers in the cabin depends on the quality of the disc and the materials used to make it.
Modern wheels are made of steel and various light alloys, which give them a number of advantages:
- Welded steel disc. This is a familiar stamped version that boasts a low price and durability. It is these discs that have the heaviest weight, are easily deformed and are more susceptible to corrosion than others. But with all their shortcomings, they are not so bad - if after falling into a hole the disk is dented, this can be quickly corrected at a service station.
- Alloy wheels (cast and forged). They have much lighter weight, high anti-corrosion and strength properties and many design solutions. But they are already much more expensive. When subjected to strong impacts, alloy wheels do not bend like steel wheels, but rather crack. Forged ones can withstand the strongest blows and are practically impossible to bend.
Additional Tips
Before replacing the Priora thermostat, it makes sense to check the new one for functionality. To do this, the part is placed in a pan of water.
As you gradually heat the water, you need to watch how the valve opens. If it is completely open at a temperature close to boiling, then it can be installed on the machine.
After replacement, remember to add antifreeze to the cooling system to the operating level indicated on the expansion tank. If a certain amount of coolant was spilled during draining, then you need to add the same color as the main fluid. Antifreezes of different colors do not mix.
