The cooling system of an internal combustion engine requires periodic maintenance. Often it all comes down to replacing antifreeze every 1-2 years of operation. Unfortunately, this is the wrong approach, because this system is quite complex and has a large number of parts, each of which plays a different role during the operation of the motor. Let's look at the Opel Astra N thermostat, its features and device.
The thermostat consists of a spring, a cylinder and a special pin.
The essence of the work lies in the fact that in a closed cylinder there is wax in the form of a ball. Under the influence of temperature, it begins to melt and expand. The pressure pushes the pin, which in turn opens and closes the valve.
It turns out that initially the large circle is closed and the coolant circulates only in the small circle. When a certain temperature (operating) is reached, the valve opens and the coolant circulates in a large circle - through the radiators. Working on a small circle provides a faster warm-up of the engine, and more on a large circle - effective cooling while driving. For this, in fact, a radiator is provided, as well as electric fans. The radiator in modern cars is cooled either by a stream of air or blown by fans.
This node fails extremely rarely, but it does happen. If you do not notice a breakdown in time, then you can overheat the engine or wait for hours to warm up to operating temperature. All this is due to a jammed thermostat valve.
It can stop both in the closed position and in the open position. If the thermostat is stuck with a closed valve, then when a certain temperature is reached, circulation does not go to a large circle and the cooling efficiency of the motor decreases. As a result, overheating. If the valve is open, then the car will warm up for a long time and fuel consumption will increase. In any case, you need to understand that jokes with cooling the internal combustion engine are bad and the sooner measures are taken, the better.
The process of dismantling this unit on an Opel car is somewhat different from others. The first step is to understand where the thermostat is located. It is located to the right of the engine, between the battery and the motor, closer to the latter. To carry out work on replacing the thermostat, you need to remove the battery and, preferably, the platform for its attachment. It is very simple to do this, we throw off the terminals and unscrew the three bolts.
The next step is to remove the terminal from the thermostat housing and dismantle the branch pipe. A certain amount of antifreeze will pour out, so prepare the container in advance. After that, unscrew the 4 torx screws (asterisk) and take out the thermostat. At the same time, you can make a visual inspection of it. If the rubber seals of the valve are out of order, then a replacement. The same applies to the case of jamming. In principle, replacing the thermostat with an Opel Astra N is performed in the same way as for any other car brand, except that in our case you need to remove the battery for more comfortable operation. Now let's move on.
One of the most important moments is buying a new thermostat. Today there are a huge number of them. The best ones are original. True, such products have a high cost, but the quality is almost always consistent. There are Chinese counterparts, they are characterized by low cost and poor quality. It is highly discouraged to install such thermostats due to their unpredictability.
The best option is a high-quality analogue.It can be a suitable thermostat from another car or from a well-known brand at an affordable price.
Consumer reviews, for the most part, come down to buying the original. Its price is about 800-1000 rubles, but the quality is at a very high level.
As noted at the very beginning of this article, the cooling system needs to be serviced regularly. If you decide to change the thermostat, then it's time to fill in new antifreeze and replace the filler cap. The latter also has a valve that is triggered when a certain pressure in the system is reached. If it does not hold, then the antifreeze will boil not at 120-125 degrees, but already at 105. If it is stuck in the closed position, it can rupture the radiator due to excessive pressure.
In any case, it is better to install a new cover and replace the antifreeze, especially if this has not been done for a long time. As for the coolant, it is also important to pay attention to its quality. It is advisable, of course, to fill in what is recommended by the manufacturer or certified analogs. Poor-quality coolant can lead to such unpleasant consequences as constant operation of cooling fans, boiling, etc.
Often, the replacement of the unit is not required, and the malfunction may be caused by another reason. In this case, it is recommended to check the thermostat. This is quite simple to do. On a warm engine, try the upper and lower pipes leading to the radiator. Both should be hot. If the lower one is cold, then this indicates a jammed valve in the closed position. Consequently, the coolant does not circulate in a large circle.
You can also try the bottom of the radiator, if it is cold and the bottom pipe is hot it is likely clogged. In this case, before replacing the antifreeze, it is necessary to flush the system several times and clean the radiator from the outside, as it becomes clogged with road dirt. If the “Opel Astra N” 1.6 thermostat is still inoperative, then it must be replaced as soon as possible.
As you can see, it will not be difficult to replace the Opel Astra N Z16XER thermostat on your own. This can be done with a minimum amount of tools. All work will take from an hour to two. But you can get experience and a couple of thousand savings. Try to monitor the tightness of the system. If there is a leak in the radiator, then it must be eliminated. This can be done either by soldering or replacing with a new one. You can also use a special powder, which is poured hot into the filler neck of the cooling system when the engine is running. The powder can tighten up a small leak and thus solve the problem for a while.
As you can see, there is nothing difficult in changing the Opel Astra N thermostat yourself. Its price is about a thousand rubles (original), a high-quality analogue will cost 600-700 rubles, and frank China - 300-400. Not such a large amount to save money, especially since the part is quite responsible and should work like a clock. It is imperative to buy the right thermostat as there are “late” and “early” ones. Their difference is that some open with a slight delay, while others, on the contrary, earlier. It is better to use the VIN number of the car and buy exactly what was from the factory.
VIDEO
He took out the thermostat. sad picture, he is always open. Accordingly, there was a beater in the car. The price of the new one unpleasantly struck. from 2 to 5 tr. It's a pity for this piece of iron. Began to understand, thanks, people from the forum have advised.
Photos. how to disassemble the thermostat and what to clean.
Yes, with a little effort. the stem fits quite tightly into the hole.
And why shouldn't it open up, because they removed the scale purely mechanically, and it opens not like everyone else, but electronically, when voltage is applied to the connector.
Yes, with a little effort. the stem fits quite tightly into the hole.
And why shouldn't it open up, because they removed the scale purely mechanically, and it opens not like everyone else, but electronically, when voltage is applied to the connector.
And why shouldn't it open up, because they removed the scale purely mechanically, and it opens not like everyone else, but electronically, when voltage is applied to the connector.
here you are deeply mistaken
kroilovo leads to popalov
here you are deeply mistaken
kroilovo leads to popalov
so that you do not have followers
brass cylinder
nothing personal
so that you do not have followers
brass cylinder
nothing personal
the design is standard so almost all thermostats are arranged
I think that it is better to try to boil such thermostats in a pressure cooker
it's better to change the thermostat
so wait, if you just throw a 12 volt on the thermostat, the stem starts to heat up and see if it opens or not. If so, then in theory, and so the question will have to open at what temperature.
And also kostia111 explain pliz what this wax generally influences. To the opening temperature or to the “opening at a given distance” of the thermostat.
puts up with a temperature of 112 degrees, I think not necessary
when the engine is loaded, the engine control unit turns on the forced heating of the thermostat in order to shift its opening temperature downward to 95 degrees
for a very long time looking for the problem of overheating of one corsa
the cooling system for gas breakthrough can be checked with a conventional gas analyzer
the radiators are new, when the stove heater is turned on at idle, the temperature drops, but if at a constant speed, it remains unchanged at whatever speed of the stove fan I set.
I wrote in the next topic, but I will repeat if this is normal:
Well tell the astrovody. is all of the above normal. (I will remind you that I changed the thermostat to Vahler 4431.105D).
the radiators are new, when the stove heater is turned on at idle, the temperature drops, but if at a constant speed, it remains unchanged at whatever speed of the stove fan I set.
I wrote in the next topic, but I will repeat if this is normal:
if you just stand at idle speed 1 fan speed works 112-113 gr. well, and accordingly drives up to 104-105 gr.
is this the first fan speed
I came across Vectra
An automobile thermostat is one of the main components of the cooling system, which performs a controlling and regulating function. Its main task is to prevent the movement of coolant to the cooling radiator until the engine has reached operating temperature.
The principle of operation is quite simple. While the engine is cold, no coolant flows through the radiator. As soon as the antifreeze (antifreeze) reaches a temperature of 90-95 degrees Celsius (depending on the setting), the thermostat opens the valve and starts the coolant in a large circle. In this way, rapid heating is ensured, and subsequently the maintenance of the engine temperature at the same level and the exclusion of its overheating.
The thermostat, despite its simple design and reliability, tends to fail. In this case, corrosion is most often the cause of problems. The faults themselves can manifest themselves as follows:
The assembly remains closed and does not open (wedge). In this case, the engine will quickly gain temperature and overheat even in the winter cold. There are situations where the thermostat is triggered, but not completely. In this case, engine overheating takes place, but it may not come to a "boil".
When the valve hangs and does not close, then the heating of the power unit to the operating temperature can take a very long time. In winter, it becomes a problem to warm up the engine at all. With a working thermostat, the motor should warm up in no more than 10 minutes. In summer, the engine temperature will be in the range of 70-80 degrees.
So, if the thermostat became the cause of your problems, then you should not delay solving the problem - change it.Such work on the service will cost about 700-1000 rubles (excluding material). In case of self-replacement, this money can be left in your pocket. So, the algorithm of actions is as follows:
Prepare your tools. For work, you need a small screwdriver (usually these are used to repair watches), a TORKS head on "10", a socket wrench with the same diameter, a set of socket heads, side cutters and pliers.
Visit a car store and buy a new thermostat, a gasket for it and an antifreeze canister (it is better to take 5 liters at once just in case).
Find the "culprit" of all events - the thermostat. In the Opel Astra N, as in a number of other cars, it is located on the right side of the power unit. To be more precise, in the recess between the engine of your car and the battery. On one side, a tube is connected to the thermostat, which connects it to the cooling radiator. In addition, a connector with wires is connected to the thermostat, which will need to be discarded (but more on that later).
To obtain optimal access to the repaired unit, it is necessary to do the following operations - alternately discard the terminals with the battery (we start with the "minus"). After that, dismantle the battery retainer plate (it is located on the left side of the assembly). For these purposes, the head on "13" is useful. After that, put the battery aside - it won't come in handy yet.
Unscrew the three bolts that fix the platform for the battery to the car body. In this case, two bolts will be visible immediately, but the third will have to look a little (it is located between the fuse block and the battery stand itself).
Remove the metal plate that secures the wires. In principle, this work is not necessary, but in this way you can maximize access to the thermostat. All that is needed for this is to unscrew one nut. The wiring harness can then be removed to the side so that it does not interfere with normal operation.
Remove the clip with wires that fits the thermostat (we already mentioned it). But everything is not so simple here. Just pressing the special "pedal" is not enough - you need to unclench the special limiter on the connector. Many beginners do not notice it right away and break out the connector "alive". A watch screwdriver will come in handy to get the stopper (just slide the bar to the side).
Unscrew and dismantle the clamp that is attached to the thermostat pipe. It is not difficult to do this - it is enough to bring the antennae of the device together with the help of pliers. It is not necessary to completely remove the clamp - just move it a little on the hose itself.
Unscrew the four bolts that fix the thermostat to the body (for this purpose, use the TORX head to "10").
Pull the hose off the port on the assembly. Before doing this, be sure to place a container of some kind under the nozzle so as not to spill the coolant on the ground.
Install a new thermostat and do not forget about the need to replace the gasket.
Now put all the equipment back in place, step by step. Be careful with the mounting bolts that secure the battery plate. If you lose them, then problems may arise with the selection of similar parts.
During the repair process, you inevitably lose some percentage of the coolant in the system, so it is imperative to make up for its shortage. Add coolant to the "KALT" level. At the same time, do not rush to tighten the plug on the filler neck.
Start the engine and run the test mode on the "bortovik". Expect the engine temperature to rise to the cherished 90 degrees. Just in case, make sure that the hose from the thermostat to the radiator is still cold. If everything is fine, then the thermostat will work and the tube you are holding onto will begin to warm up.
First, the total coolant temperature in the system is reduced by 5-10 degrees Celsius (due to the connection to the radiator system), and then everything is normalized.
After the first trip, be sure to check the coolant level again and top up. Make sure the thermostat area is free of any leaks or damage.
That's all. The work on replacing the thermostat on the Opel Astra N can be considered successfully completed.
Changing the thermostat on a car is a matter of 15-25 minutes. Then why pay money to the master? You can handle everything on your own. Good luck.
The need to replace the thermostat may arise when the engine temperature is unstable: overheating or insufficient heating.
3. Squeeze the coolant temperature sensor wiring harness retainer ...
4 .... and disconnect the connector from the sensor.
5. Loosen the radiator hose clamp by squeezing its bent ears with pliers, slide the clamp along the hose ...
6 .... and disconnect the hose from the thermostat housing connection.
7. Remove the four bolts securing the thermostat housing to its module ...
Note.
8 .... and remove the complete housing with thermostat.
Note.
If you are installing an old thermostat, pry its rubber gasket with a screwdriver ...
... remove it from the groove in the body flange ...
... and fit a new gasket into the groove. If there is no gasket on the housing of the new thermostat, install a new gasket as well.
9. To check, immerse the thermostat in a container with water heated to 75–78 ° C. While gradually heating the water, monitor the temperature at which the thermostat valve starts to open.
Note.
- valve travel (difference between the values of dimension A with fully open and fully closed valve) - 8.0 mm.
10. Install all removed parts in the reverse order of removal.
The thermostat plays an important role in the functioning of the engine cooling system. Replacing the Opel Astra thermostat with your own hands allows you to extend the service life of the power unit.
Photo of the WAHLER 4431.105 thermostat assembly on the Opel Astra car.
The reasons for replacing the thermostat on the Opel Astra are easily diagnosed:
temperature instability of the engine - constantly overheats or heats up for a long time;
the appearance of the corresponding icon on the instrument panel (car with a wrench).
After a message appears on the dashboard about the malfunction that has occurred, the error must be read.
If the problem is with the thermostat, the following will be displayed: Thermostat Heater Control Circuit / Open.
Depending on the type of Opel Astra engine, the thermostat is located in different places in the engine compartment. You can find the thermostat by connecting to the upper radiator hose.
On the 1.7-liter SOHC diesel engine, the thermostat is located on the left side of the cylinder head, on the DOHC engine on the right.
The procedures for replacing the thermostat on the Opel Astra differ depending on the type of engine. To replace without a service station, you must read the replacement manual for the required engine type.
On the Opel Astra with a Z16XER gasoline engine, the thermostat is located between the battery and the power unit.
Remove the negative and then positive terminals from the battery.
Drain off coolant.
Unscrew the battery holder.
Get out the battery.
Unscrew the 3 bolts securing the platform for the storage battery and disconnect the wires.
Remove the site.
Move aside the blue strip from the clamping pedal. To remove the terminal from the thermostat housing, you must remove the blue strip from the terminal lock pedal. The procedure is performed only with a clock screwdriver. A standard screwdriver will break the stop.
Step on the pedal and remove the terminal.
Squeeze the ears of the clamp off the thermostat pipe using a pair of pliers.
Remove the thermostat by sliding it along the hose.
Remove the 4 bolts securing the hose to the thermostat housing.
Dismantle the thermostat housing.
On an Opel Astra with a Z16XER engine, the thermostat is hard to get out of the case - a breakdown of the mounting racks is possible. The element is replaced together with the body.
The Z16XER engine of the Opel Astra car.
After installing the structure, it is necessary to fill in coolant to the KALT level.
Opel Astra is available with 1.7- and 2-liter power units. The procedure for replacing the thermostat on these engines is different.
Before replacing the thermostat on diesel engines, drain the coolant from the system and prepare the jack.
Before replacing the thermostat, you need to raise the front of the car with a jack and put the car on the handbrake.
Drain coolant from cooling system.
Remove battery with support bracket.
Loosen the fastening clamps.
Remove the upper radiator hose from the thermostat cover.
Unscrew the screws securing the thermostat cover and remove it.
Remove the thermostat from the housing and remove the O-ring.
The structure is assembled in the reverse order.
Before starting the replacement, jack up the vehicle and drain the coolant.
Remove the air filter.
Disconnect the air mass sensor.
Disconnect the wires from the temperature sensor - it is located on the thermostat.
Loosen the clamps for the thermostat hoses.
Disconnect the 3 hoses from the thermostat housing.
Remove the mounting bolts from the thermostat housing.
Take out the thermostat housing.
After dismantling the thermostat, the gasket must be removed from the housing.
VIDEO
The need to replace the thermostat may arise when the engine temperature is unstable: overheating or insufficient heating.
To check the thermostat on an Opel Astra car, start a cold engine and touch the upper radiator hose with your hand - it should be cold. After the coolant temperature reaches (80 ± 1.5) ° C, the hose should quickly heat up, which indicates the beginning of fluid circulation along a large circuit. If this does not happen, remove the thermostat and check its functionality.
On different Opel Astra engines, the thermostat is fixed in different places, but there is a common defining feature: it is always connected to the upper radiator hose. In this subsection, the removal, installation and inspection of the thermostat is shown using the example of a Z 16 XER engine.
You will need: socket head TORX E10, sliding pliers.
1. Disconnect the wire from the negative terminal of the storage battery.
2.Drain the engine cooling system (see Replacing the coolant).
3. Squeeze the coolant temperature sensor wiring harness retainer.
4. . and disconnect the pay-off block.
5. Loosen the clamp of the radiator hose by squeezing its bent ears with pliers, slide the clamp along the hose.
6.. and disconnect the hose from the thermostat housing connection.
7. Remove the four bolts securing the thermostat housing to its module.
Shown on removed cylinder head for clarity.
eight. . and remove the housing assembly with the thermostat.
The Z 16 XER engine thermostat and housing are difficult to disassemble. Attempting to remove the thermostat from the housing may break off the thermostat mountings. Therefore, replace the complete thermostat with housing. On other Opel Astra engines, the thermostat can be easily removed from the housing.
Warning
If you are installing an old thermostat, pry its rubber gasket with a screwdriver.
... remove it from the groove of the body flange.
... and install a new gasket in the groove. If there is no gasket on the housing of the new thermostat, install a new gasket as well. The old crimped gasket may not provide a tight connection when reinstalled.
9. To check, immerse the thermostat in a container with water heated to 75-78 ° C. While gradually heating the water, monitor the temperature at which the thermostat valve starts to open.
The cooling system thermostat is considered good under the following conditions:
valve opening start temperature - (80 ± 1.5) ° WITH; full opening temperature of the valve - 95 ° C;valve travel (difference in size A with fully open and fully closed valve) - 8.0 mm. If the thermostat valve does not start to open at a temperature of 90 ° C, then the thermostat is faulty and must be replaced.
10. Install all removed parts in the reverse order of removal.
11. Fill with coolant (see "Replacing the coolant").
Do-it-yourself repair and replacement of the Opel Astra thermostat, a tool on how to independently change the thermostat without a service station. Repair Opel Cadet with your own by hand ... Do-it-yourself Opel Astra thermostat replacement Step-by-step guide to repair and replacement of an Opel Astra thermostat with your own hands with photos and videos.
The thermostat plays an important role in the functioning of the engine cooling system. Tuning the Car Opel Cadet with your own hands Replacing the Opel Astra thermostat with your own hands allows you to extend the service life of the power unit.
Photo of the WAHLER 4431.105 thermostat assembly on the Opel Astra car.
The reasons for replacing the thermostat on the Opel Astra are easily diagnosed:
temperature instability of the engine - constantly overheats or heats up for a long time;
the appearance of the corresponding icon on the instrument panel (car with a wrench).
After a message appears on the dashboard about the malfunction that has occurred, the error must be read.
If the problem is with the thermostat, the following will be displayed: Thermostat Heater Control Circuit / Open.
Depending on the type of Opel Astra engine, the thermostat is located in different places in the engine compartment. Do-it-yourself steering rack repair Nissan Sunny video Special Auto NN Do-it-yourself Opel cadet repair You can find the thermostat by connecting to the upper radiator hose.
On the 1.7-liter SOHC diesel engine, the thermostat is located on the left side of the cylinder head, on the DOHC engine on the right.
The procedures for replacing the thermostat on the Opel Astra differ depending on the type of engine. DIY Land Rover Freelander repair Opel cadet repair by their repair with your own hands. To replace without a service station, you must read the replacement manual for the required engine type.
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On the Opel Astra with a Z16XER gasoline engine, the thermostat is located between the battery and the power unit.
Remove the negative and then positive terminals from the battery.
Drain off coolant.
Unscrew the battery holder.
Get out the battery.
Unscrew the 3 bolts securing the platform for the storage battery and disconnect the wires.
Remove the site.
Move aside the blue strip from the clamping pedal. Opel combo 1 3 diesel repair do it yourself. To remove the terminal from the thermostat housing, you must remove the blue strip from the terminal lock pedal. Do-it-yourself video lesson on replacing the thermostat on an Opel Astra G car. news Repair opel cadet do it yourself video The procedure is performed only with a clock screwdriver. Popular Repair steering rack Nissan Sunny do it yourself video A standard screwdriver will break the limiter.
Step on the pedal and remove the terminal.
Squeeze the ears of the clamp off the thermostat pipe using a pair of pliers.
Remove the thermostat by sliding it along the hose.
Remove the 4 bolts securing the hose to the thermostat housing.
Dismantle the thermostat housing.
On an Opel Astra with a Z16XER engine, the thermostat is hard to get out of the case - a breakdown of the mounting racks is possible. The element is replaced together with the body.
I will tell you about removing and replacing the thermostat on Opel astra g ... You need to start replacing the thermostat by draining the antifreeze, this is necessary in order to get to it. Then you need to take a screwdriver and unscrew the thermostat and replace it with a new one.
I will tell you the process of work point by point:
We dismantle the intake duct with the sensor, as well as the air cleaner together with the air mass meter sensor.
We install the car on the handbrake, put its jack and install it on supports. It happens that there is a protection on the crankcase, it needs to be removed. It all depends on the configuration.
Then we drain the liquid from the cooling system. To pour the antifreeze back, pour it back into a bowl so that you can then conveniently pour it.
Depending on the configuration, there may be a wiring temperature sensor, if there is, we remove it from the thermostat housing.
We loosen the clamps from the thermostat housing and disconnect the two hoses - there will be the upper and lower pumping hoses. The thermostat itself is mounted on the cylinder head.
We unscrew the mounting bolts and dismantle the housing together with the thermostat.
Next, you need to remove the gasket
Then you can replace the thermostat, or try to repair it. To do this, watch the video tutorial.
Many owners of Astra J eventually experience a breakdown of the thermostat: the message “Service deadline is approaching” appears on the BC screen and the engine fan starts working at maximum speed all the time.
The Astra Jay thermostat has a built-in heating element.
We check the resistance of a working heater.
This is what the heating element itself looks like.
Some owners of Jacks take off the chip from the faulty heater, and insert a resistor with the specified resistance into it (or even simply connect the coil of a conventional relay), but let's first find out what the heater is for.
The heater is designed to move the thermostat opening point down about 10 degrees when the engine is loaded.
If you make a "snag" on the thermostat heater, in winter this option may work, but in summer it is definitely not - a seizure of the piston of the 4th cylinder is guaranteed.
And further. The heater does not burn out, and due to the ingress of antifreeze, contact between the heater and its connector inside the thermostat disappears
Based on the foregoing, it was decided to purchase a metal thermostat from a Chevrolet Cruze, catalog number 55597008
This thermostat is devoid of the sore Astra Jay thermostat, ideally fits the naturally aspirated 1.6 Astra engine
How to change a thermostat for an Opel Astra N?
VIDEO
The task of the thermostat is to speed up the warm-up process of the engine.It divides the cooling system into large and small circuits: until the coolant temperature reaches a certain temperature (80-90 degrees), the liquid circulates in a small circle without getting into the radiator, and the engine heats up faster. Read more about thermostat operation on the wiki.
The thermostat housing is attached to the engine. The location of the thermostat may differ depending on the powertrain layout. But in any case, it connects to the upper radiator hose, so it's not difficult to find it.
Video (click to play).
On gasoline engines, changing the thermostat is somewhat easier. It is necessary to drain the liquid from the cooling system, disconnect all pipes and wire connectors. Then unscrew the thermostat mounting bolts and remove it.
