Author: newavtomaster News
We will find out what the Chevrolet Niva exhaust system looks like in the material below. Initially, Chevrolet Niva cars were developed exclusively from the point of view of an inexpensive alternative to a significant number of cars. By and large, the developers succeeded, since in society this model has a strong opinion about its high performance.
The car has excellent practicality, since in addition to movement, it allows you to transport small loads. The high level of practicality is explained by the special suspension design. Its height allows you to avoid most problems associated with the road surface. In this case, we will talk about the exhaust system and possible options for improving it.
Drivers who use the car for a long time note that during engine operation, a sound appears that is reminiscent of a “roar” or “growling” in its content. You can get a pleasant exhaust sound after tuning - https://gutkat.ru/uslugi/tyuning-vyhlopa.html. The growling is explained by the formation of sound vibrations caused by gas that has been processed and is under pressure. Due to this, the speed of gas movement is quite high, which determines the appearance of the characteristic sound. Thus, a system with affected areas produces a huge amount of noise during operation, which is not typical for a complete structure.
As gases escape, the temperature decreases and a cooling process occurs. According to environmental requirements, modern cars are equipped with special cleaning filters that help retain and remove harmful impurities. Chevrolet Niva cars are no exception. For proper operation of the injector and electronic control unit, a lambda probe must be used.
In general, if the exhaust gas exhaust system is disassembled into elements, then at the end you will get the following sequence: muffler; muffler for additional purposes; catalyst; Lambda probe; receiving tube. The elements are connected through auxiliary tubes and fastening clamps.
Resonator and muffler for Niva Chevrolet - repair price, what spare parts to buy
I always welcome spring with some kind of repair, and now, after driving along completely broken roads, I heard the rumble of the engine)) I looked under the Shevik and saw that the muffler was hanging on a mount and was not connected to the resonator in any way.
The resonator pipe was rotten and the muffler fell off right at the place where it was attached. Well, I’m going to the guys for service, we stopped by to see if the “pants” (exhaust pipe) are intact. The pants turned out to be fine, so I'm going to the store to buy a resonator and a muffler.
That's it, I drove without a muffler for 1 day before the repair.
And here a surprise awaited me. The seller asks which model you want, old or new. I have no idea at all, I’m interested and find out that until 2002, Shnivys had an old-style exhaust system. I say Shevik 2004, this year is generally a transitional year. That is, cars from the beginning of 2004 may also have an old-style silencer and resonator. Or maybe something new. I bought an old-style resonator and was wrong. Here it is, in the photo:
Old style resonator (for cars before 2002)
I went to the store, didn’t have what I needed and they returned my money without any problems.
I crawl under the car, take a photo, then look on the Internet using pictures)) Then I google it and it turns out that in nature there are several varieties of new type resonators - with and without a catalyst, as well as Euro-2 and Euro-3.
I happened to have a new model cut with a catalyst, the real price of a new one is about 5,000 rubles. Because the catalyst is quite expensive and is also sold separately.
However, I was lucky and the next store had a Euro-2 resonator in stock without a new type catalyst. It’s the same length as mine, only there’s no need for a second “siphon-catalyst”. I took it because, as the seller told me, the catalyst is responsible for compliance with emission standards, etc. In my village, these standards didn’t fall for me, so I took it. Price - 1000 rubles. With a catalyst - 4500 rubles. The difference is obvious))
In the photo - Euro-2 without a catalyst, the one I took for myself (price tag 1000 rubles)
But this is already expensive - Euro-2 with a catalyst, price tag 4500-5000 rubles
Initially, I had one like this, but paying 5k isn’t really a big deal, thank you. Here it is still on my Shevik:
Now about Euro-2 and Euro-3. The numbers indicate the number of mounting holes (at the place where the resonator is attached to the “pants” and on the other side to the muffler). If you don’t know, it’s better to crawl under the car and take a look so as not to experience the same hemorrhage as I did. I drove around the city for 3 hours looking for what I needed, because I was not ready to pay 4,500 rubles for a pipe.
Muffler - I took a new model, which has a short side pipe (the old model - with a long pipe that connects to the resonator). Okay, at least I guessed right with him)) Here it is:
In addition to these two parts, it was necessary to buy a clamp with a graphite washer, as well as a set of bolts with springs and a gasket.
The photo shows bolts with springs and a gasket
They sold me a clamp from Priora (we have sellers, crap), well, at least the service guys found a used ear clamp from Niva, and they supplied it to me. True, at rpms above 3500, “clipping” is heard, so I’ll probably buy a new one later and replace it. In the meantime, I don’t turn the engine over 3000 rpm and everything is fine.
Clamp with graphite washer - for connecting pants and resonator
What happens if you drive without a muffler?
This question worried me for exactly 1 day while I was riding without it. I'll tell you about my experience))
First - gases! There was a clear smell of exhaust fumes in the car, so I had to drive with the window open, because you could actually get burned.
Second - sound! I had to not turn the engine over 2000 rpm (and for a Chevy Niva this is very little, because the engine is weak), and so I drove - I could barely spin during acceleration. But even though there was no muffler, there was no terrible roar, quite normal. I didn't notice any increased power at all.
I don’t know what will happen if you drive for a long time without a muffler, I read on the forums that compression is disrupted, because the muffler “holds back” the gas pressure. Someone says that you can drive and there will be no problems. The service guys also said that there would be no consequences for a week or two. But I didn’t dare to tempt fate, so I fixed the exhaust system on the second day.
Components
The exhaust of a Chevrolet Niva car is made by analogy with the previous model - VAZ 2121. But some units and components were also added to it, which increased efficiency and reduced the amount of harmful emissions. Main nodes:
- Downpipe
- Catalyst
- Lambda probe
- Resonator
- Muffler
- Fastenings
- Outlet pipe
Let's try to take a closer look at each component and understand their purpose.
Reception pipe. Sometimes also called the knee. It is made of durable materials, resistant to high temperatures, since it is exposed to the hottest gases and sparks of incompletely burned fuel. It has a curved shape, which is how it got its name. Studs and heat-resistant gaskets are used to connect to the engine. The main purpose is to remove gases from the engine and direct them down under the bottom to other components.
Lambda probe. It is installed at the junction of the exhaust pipes and screwed into the system. This is a sensor that measures the oxygen content in exhaust gases. These parameters are affected by the ratio of the fuel and air mixture that enters the cylinder.
Catalyst. Connects to the exhaust pipe. This is a non-separable structure made in the shape of a barrel. The function of the catalyst is to transform the exhaust and clean it of harmful substances. The neutralizer, which is located inside, consists of sequentially arranged elements whose task is to minimize the amount of particle emissions. The component is designed to last 100-120 thousand kilometers, after which it can become clogged with combustion products or its filler begins to crumble, rendering it unusable. As a result, the car's power is significantly reduced and it begins to stall at idle. Therefore, the most preferable is the Chevrolet Niva exhaust system without a catalyst, the percentage of contamination of which is not much higher, but at the same time the reliability is much higher.
Resonator. It has a shape that makes it look like an aftermarket muffler, but it's not. Combustion products enter the exhaust system after the exhaust valves open, which means this occurs unevenly. Therefore, its task is to distribute the exhaust in the system and smooth out the flow. For this purpose, a system of meshes is used, passing through which the speed of air movement is reduced. Some people believe that it also reduces the volume of the system, but this is not so.
Muffler. It is this component that affects the exhaust volume. It is the final element. The connection to the resonator is made using heat-resistant rings and a clamp. The muffler can be made of several materials:
- Aluminum
- Stainless steel or galvanized
- Black metal.
Suspensions. The task of these components is to mount the system to the body and dampen vibration so that noise is not transmitted to the body and makes staying in the cabin as comfortable as possible.
How else can you reduce the noise level of the muffler?
You can also install a mirror muffler to reduce noise. Such models work on the same principle as acoustic mirrors. Most often, mirror mufflers can be found in the exhaust systems of two-stroke engines of motorcycles and scooters. The muffler device in this case consists of an exhaust elbow and a resonator jar in which the exhaust gases are “calmed down”. In this case, the resistance level will be significantly lower, and the engine power will not be consumed. However, it is worth considering that due to the mirror effect, the temperature of the exhaust pipe will increase.
A similar principle is used in the systems of VAZ 2107, Niva, 2115 and many others.
In addition, there are absorption and limiting mufflers, which also reduce noise.
Composition, principle of operation and features of tuning the exhaust system of Niva Chevrolet
Every car, including the Chevrolet Niva, has an exhaust gas exhaust system in its design. As you know, the combustion process of the combustible mixture occurs in the engine, due to which the car is set in motion. The burnt mixture, in turn, cannot dissolve inside the engine and is therefore removed from it through a system consisting of basic elements. These elements serve not only for the removal of gases, but also for... However, this article will tell you about this, as well as how to replace and tune the exhaust system of a Chevrolet Niva car.
Direct flow muffler
In conventional mufflers, in the process of resisting exhaust gases, part of the engine power is lost. Although this consumption is insignificant, many car enthusiasts are looking for ways to make the muffler quieter without losing engine power. For these purposes, manufacturers have developed special direct-flow models.
The design of such a muffler differs from the usual design. Unlike standard models, in direct-flow units the engine power is not only reduced, but also increased by using the energy of the exhaust gases.
The essence of the operation of “forward flows” is that when gases exit the collector, less resistance is required. Thanks to this, the motor does not have to expend extra energy to overcome the pressure. The resulting difference is converted into useful driving power.
The direct-flow muffler itself is a straight pipe with a perforated surface. By and large, it is enclosed in an outer casing. There are also separators and chambers inside the muffler, just fewer of them than in standard systems. Thanks to this design, the exhaust gases move in a straight line and do not encounter strong resistance. At the same time, thanks to the perforated surface, they expand and come out freely.
What does the system consist of?
The Chevrolet Niva gas exhaust system is very different from its predecessor, the VAZ 2121. New system components were added that affected the efficiency, quality and ecology of the exhaust. So, the components of the system are:
- Downpipe or elbow;
- Lambda probe;
- Resonator;
- Muffler;
- Suspensions;
- Outlet pipe;
- Catalyst.
Let's consider each element separately, what functional actions they perform and what they consist of.
Reception pipe. The exhaust outlet pipe or elbow is used to receive direct exhaust from the vehicle's engine. It has a curved shape, hence the name, and consists of two tubes attached to the exhaust manifold. After bending, these tubes flow into one and are connected to the next element. The intake pipe is fixed with special pins and the joint is sealed using a heat-resistant gasket. During engine operation, not only exhaust gases pass through the elbow, but also sparks of unburnt fuel, so this design experiences high temperatures. At the junction of two pipes into one, there is an innovation, which consists of a special sensor that is screwed into the exhaust pipe. This sensor is called an oxygen or lambda probe.
Improving the model
To improve the model, you can use methods of externally changing the design. One such example is a dual outlet exhaust system. During operation, an additional pipe is welded to the end of the muffler. Depending on the quality of the pipe and its shape, the sound vibrations may change. Of course, not every car enthusiast is interested in this type of activity.
More serious changes relate directly to the functionality of the unit and increase the power characteristics. To increase power performance, the Chevrolet Niva exhaust system must get rid of the converter and lambda probe. Instead of the latter, a snag is installed. When working with a resonator, there are two options, which involve removing it completely or replacing it with a new one. Also, a new pipe with a larger diameter should be installed. In order for gases to be extracted at a higher speed, the installation of an additional element called a “spider” is required.
The above is a system change diagram that can be used as a whole, however, selective changes are also acceptable. Everything is determined by the goals of the car owner. By performing these manipulations, you can achieve an increase in power characteristics by 15 hp. However, it is worth considering the fact that the sound of the engine will change greatly, and the amount of harmful emissions will also increase, which is not welcome in society and on the roads.
Also interesting: Second generation Chevrolet Niva SUV - photo!
The Chevrolet Niva exhaust system undergoes profound changes extremely rarely. This is due to a number of reasons, primarily the high cost of work. The Chevrolet Niva is a relatively cheap model, not intended for racing, so creating a powerful system does not meet the common sense of the design of this car.
Replacement of exhaust system elements
Often, every motorist encounters the problem of burning out a muffler, resonator or other elements on a Chevrolet Niva, which entails an unpleasant sound from under the bottom. If elements burn out, it is better not to try to weld on steel linings, but to immediately replace the part.
Muffler replacement
Although the Chevrolet Niva car has decent ground clearance, replacement of exhaust parts is carried out from the inspection hole, because strong physical effort is required to unscrew the fasteners. The muffler on Shnivy is removed in the following order:
Using two keys set to “13”, you need to unscrew the nuts connecting the muffler to the resonator and remove the clamp. The auxiliary muffler is lowered down and the graphite sealing ring is removed from the connection point. The muffler brackets are removed from the hangers on both sides and the muffler is removed. If the suspensions have visible defects, it is recommended to replace them as well. Install the new muffler in reverse order. It is the muffler that is the most common element of the system that becomes unusable.
Replacing the resonator paired with a catalyst
The catalytic converter has a one-piece design with a resonator, which is a disadvantage in the Niva Chevrolet. The neutralizer has a service life much longer than the resonator, but if the latter fails, both elements must be replaced. Due to the long service life, the connections oxidize and therefore it is necessary to treat them with VD-40 lubricant before removing them. Next, we move on to the removal and replacement process:
The connection to the receiving pipe is unscrewed with two keys “17” and disconnected. The connection between the resonator and the muffler, which was described above, is disconnected. The rubber suspensions are removed from the brackets and the resonator and neutralizer are removed. Reinstallation of new elements is carried out in the reverse order of removal. But the cost of a pair of neutralizer and resonator will cost a considerable amount, so it is advisable, if the catalyst is not damaged, to separate the part with a grinder. Then weld the new resonator and install it in the seat.
Features of tuning the exhaust system of a Chevrolet Niva
The easiest way to tune a car is by going to a specialized service station. But specialists will charge a decent amount for their work, and you will regret that you paid that kind of money for work that you could have done yourself. Tuning the exhaust system does not require any welding work, because ready-made parts can be purchased at a special auto store. If you pay attention to the cost, then everyone will be able to find the appropriate tuning part for their pocket.
Why is it necessary to upgrade the exhaust system? So, it is known that the exhaust system is an additional resistance for the engine. And resistance is a physical phenomenon that negatively affects the power of the motor. The greater the resistance, the less power. It is this reason that serves to make changes to the Niva Chevrolet car. Plus, tuning makes the car brighter, more attractive and more expensive.
Basics of safe repair work
Despite the fact that the work is carried out with the engine turned off, there is a high probability of suffocation from exhaust gases. Therefore, the work room must be equipped with excellent ventilation or be easily blown to allow oxygen to enter. Before performing any activity, ensure that sufficient time has passed for the system to completely cool down. Otherwise, you may get severe burns. It is worth noting that the cooling of the catalyst in relation to other elements is longer. It is strictly prohibited to carry out repairs in close proximity to fire. When performing work, you should not use a jack; it is dangerous and can lead to undesirable consequences.
