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The exhaust system does not have a complex design or device at all. Its main task is to release exhaust gases. But it's not that simple. If you released exhaust gases into the atmosphere, the damage to nature would be enormous. Therefore, modern developments have been applied that allow gas to be purified before exiting, making them safer for the environment.
Bottom view
Let's study the exhaust system using the example of the VAZ 2109 model.
Muffler device for VAZ 2108 and 2109
It should be noted right away that the mufflers of the VAZ 2108 and VAZ 2109 cars are practically no different from each other in design. The only difference is the dimensions: the exhaust pipe on the “nine” is 8 cm longer.
Muffler for VAZ 2109, body made of stainless steel
The muffler on VAZ 2109 and 2109 cars consists of two parts:
- main muffler;
- additional muffler (aka resonator).
The main muffler body has the shape of an oval pipe and is made of alloy steel. The housing has a number of partitions that form resonator compartments. There are also two exhaust pipes (exhaust and inlet) and the main exhaust pipe. All these elements are connected using rolling. Spot welding is practically not used in such devices, so as not to reduce their corrosion resistance.
The muffler design for the VAZ 2109 is practically different from the muffler for the VAZ 2108
The resonator body is a round tube with an aluminum coating. Inside there is another pipe with holes, at the ends of which there are mounting flanges. With their help, the resonator is connected to the gas receiver of the car.
Repair methods
Often traveling along our “magnificent” roads, you now and then run over all kinds of bumps, potholes, and holes. If, after passing another similar obstacle, the car begins to make noticeable noise, which was not the case before, then the most likely outcome is a hole in the main muffler. The presence of a hole does not allow you to work calmly, quietly and efficiently as before.
The law of the Russian Federation states that it is prohibited to operate a car with a broken muffler. Therefore, the only correct solution would be to repair the unit.
There are two ways to repair the main muffler:
- Replace with a new one. Practical, easy and fast. You can do this kind of work with your own hands without any problems.
- Fill the hole. This option is suitable only if the hole can be welded given its size, and you also have experience in welding. It is better to entrust welding to professionals.
Replacing the main muffler
To remove the muffler, follow fairly simple step-by-step instructions.
- Arm yourself with a 13mm deep socket socket, a 13mm spanner and a ratchet.
- Drive the car into the inspection hole, or lift it using a lift. Although you are unlikely to have a lift in your garage. But almost all garages in auto cooperatives are equipped with pits.
- Wait until the entire exhaust system has cooled completely, otherwise burns will occur.
- Disconnect the main muffler from the resonator, that is, the additional muffler. To do this, find a tie rod. The fastening nut is grabbed with a spanner to avoid turning. At the same time, the bolt is unscrewed using a ratchet.
- After unscrewing the bolt, remove the fasteners, disconnect the exhaust system elements, remove the clamp and free the main muffler from the resonator.
- Carefully remove the front part of the silencer from the rubberized suspension.
- Remove it from the rear suspensions and pull the damaged element out.
- Then act according to the circumstances. As we noted, a broken muffler can be welded, or a new one can be installed in its place.
- Reassembly is carried out according to the instructions provided, only in the opposite sequence.
When choosing a new main muffler, focus on the characteristics of the factory product. If you want to modify the rear of the car, simply install a decorative nozzle on a regular pipe. You should invent something with the modernization of the aircraft only if work is being carried out on the technical modification of the car - tuning.
Dismantling works
Replacing the resonator
To change the additional muffler, follow the instructions provided:
- By analogy with the previous stage, disconnect the main and additional mufflers;
- Disconnect the element from the catalyst. Here you have to use a spanner wrench to unscrew a pair of mounting bolts;
- Lift the unit a little and disconnect it from the rubber hangers;
- In some cases, this cannot be done manually. In such a situation, use a flathead screwdriver to pry out the hangers;
- The dismantling process is even easier than in the case of the main muffler;
- Installing a new element is performed in the reverse order.
How to determine whether a muffler is faulty
It is not difficult to understand that the muffler of a VAZ 2109 car is faulty:
- the volume of the engine increases sharply, the engine begins to growl;
- In this case, the engine power is reduced by two or even three times;
- the cabin smells of exhaust fumes;
- if the driver does nothing, the growl of the engine is replaced by a deafening roar, which can sometimes be accompanied by pops similar to pistol shots.
All this suggests that a hole has formed in the muffler housing. If you don't do anything about it, then problems are inevitable:
- If the muffler is faulty, carbon dioxide contained in the exhaust gases may end up in the vehicle interior. This gas is colorless and odorless, but causes severe headaches and dizziness. And if exposure to dioxide lasts for a long time, it can lead to the death of the driver;
- Driving with a faulty muffler cannot be called comfortable;
- Driving with a faulty muffler is expensive: there are rules to limit noisy driving. Violation of these rules may result in fines.
Main elements of the exhaust system
The muffler resonator is installed immediately after the exhaust pipe and the catalyst, and its task is to level out pulsations of the gas flow. In cross-section, it looks like a perforated pipe placed inside a metal chamber of a larger diameter. The pipe can change its cross-section on the way from the inlet to the outlet of gases.
The main muffler may have a more complex design and has the main function of noise reduction. Modern systems can have almost all noise reduction schemes in the rear muffler can. The chamber through which the main pipe passes can have several sections, each of which has noise reduction at its own level. Typically, these chambers are filled with heat-resistant fiber material, which further dampens vibrations and absorbs sound vibrations.
The design of a car muffler is constantly evolving, and we try to follow the news from the design bureaus of the most progressive automakers and tuning studios. Stay with us, and let your mufflers only please the ears of avid motorists. Happy travels to everyone!
Assembly of a double muffler for a VAZ 2109
Before describing the process of assembling a double muffler, I would like to note that in order to successfully carry out such an assembly, the driver must be able to work with a welding machine. If you don’t have such skills, it will be much easier to buy a ready-made double muffler for the VAZ 2109 in a specialized store.
Ready-made double muffler for the VAZ 2109, which can be bought at a car store
Engine support cushions
If, while driving, knocking noises are heard in the engine area, regardless of whether the car is driving on a flat road or on bumps, and at the same time the car begins to vibrate, shake, or the steering wheel hits, then you should pay attention to the engine mounts, especially often on VAZ 2110/2115 and others, the lower support of the internal combustion engine (on the gearbox) fails
You also need to check the condition of the left and right airbags. To do this, just grab the engine and shake it. If the unit wobbles freely, there is something wrong with its supports. Strong vibration of the internal combustion engine may also be observed during its operation.
There is only one way out - replacing the failed support cushions.
Wheel rim bolt pattern for VAZ, Ford, Opel, Nissan, bolt pattern table
Tuning
Those who want to change the exhaust sound to a sportier one can install a straight-through Stinger muffler. The exhaust system of the VAZ-2109 is also modified by installing a “Stinger” brand spider.
As a result, gases will freely leave the combustion chamber. But you need to understand that the exhaust sound will increase several times. Since there are no such labyrinths in a direct-flow muffler, all gases go directly into the atmosphere.
The car will sound sporty, but there is no need to talk about a significant increase in power. A more correct solution is to install such a muffler after upgrading the engine. You can start by installing a 16-valve head, then change the intake system, mount a turbine, and so on. There is no point in installing direct flow on a simple VAZ engine. The standard exhaust system already copes with the exhaust from a simple atmospheric engine. In the case of installing a turbine on a “nine”, such modification is simply necessary.
Changing the resonator
To do this, we need a basic set of tools (open-end wrenches and heads), as well as an inspection hole. You can start repairing the VAZ-2109 exhaust system only after making sure that it has cooled down. So, we need to disconnect the resonator from the muffler on one side and the catalyst on the other. You need a socket wrench to unscrew a couple of bolts. Then we lift the resonator and disconnect it from the rubber pads. If the resonator does not budge, you need to use a flat-head screwdriver. With this we can carefully pry off the rubber suspension element. Then everything is simple - we take the part out and put a new one in its place. Assembly is carried out in reverse order.
What materials are they made from?
Silencers of all types can be made from:
- Of stainless steel;
- Aluminized (alloy of aluminum and steel);
- Regular black steel.
A stainless steel product can last, during active vehicle use, from 6 to 10 years, as it is least susceptible to corrosion.
They are sold on the market in a high price range, their big advantage is that despite the high price, they are mass produced and can be matched to most car brands.
Products made from aluminized steel are sold in the middle price range, they are also quite durable, but they are difficult to match to a specific car brand, since the choice on the market is not large (only a few companies produce them).
It is problematic to make such a muffler in a garage. The main advantage is a long service life of up to 6 years, and are less susceptible to corrosion.
Products made of black steel are mass produced because they are the cheapest. They can be made in a garage for any brand of car, but they will serve for 3, maximum 5 years, then the aggressive environment and rust will do their dirty work.
OKA car
The Lada OKA muffler is located perpendicular to the car body.
Inside the device there are three chambers and two partitions, three perforated pipes. No special innovations were introduced into the design of the product, so the principle of operation remains unchanged.
Catalyst
Replacing the catalyst on the “nine” is an impractical operation due to the cost. It is much cheaper to replace this element with a flame arrester. The exhaust system of the VAZ-2109 (injector, 8 valves) will not change its characteristics, and the exhaust will remain quiet. The only thing that will change is the toxicity of the gases. The exhaust will be more pungent. So what does it take? First, the catalyst itself is removed. To do this, you will again need a set of keys and an inspection hole. After unscrewing all the fasteners, the part is taken out. A flame arrester is installed in its place. A ready-made flame arrester is ideal in size. There are a lot of these sold in stores.
