Muffler VAZ 2109 - which one to choose, how to install

VAZ-2109 is perhaps the most famous Russian-made car. This car has been produced since the times of the USSR. It was the first car where torque was transmitted to the front wheels rather than to the rear wheels. The car is very different in design from the usual “classics”. But is the exhaust system of the VAZ-2109 so different? The design, purpose and features of the system will be described later in the article.

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.

Design Features

All domestic cars have approximately the same exhaust system. This greatly simplifies the issue of self-repair without the involvement of specialists.

The exhaust system (ES) includes several main components.

Main components and fasteners
The entire exhaust system of the VAZ 2109 car is in a suspended state and is held in place by the presence of rubber mounting hangers. The hangers, in turn, are screwed to the bottom of the car.

Popular faults

The exhaust system itself, together with the muffler, is quite reliable and durable due to its simple design.

Frankly speaking, there is nothing to break if you compare the aircraft with the engine, fuel, oil system, and so on.

The most common and unpleasant situation that can happen to an aircraft on a VAZ 2109 is a broken muffler. This is due to the quality of our roads, or rather to their absence.

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.

Types of mufflers and their differences

There are 4 types of mufflers based on the method of absorbing acoustic waves:

The reflective circuit is reverse-flow, the rest are direct-flow.

Reflective

If one muffler is installed in a car, then a reflective version is used. It uses the principle of “breaking” the flow of exhaust gases by creating several partitions, expansion chambers and turns. Exhaust volume is reduced to standard levels. For this reason, the vast majority of factory vehicles are equipped with the reflective type.

most popular for factory vehicle configuration

The disadvantage of this type of muffler is the reduction in engine power due to the resistance of the exhaust system to the flow of exhaust gases.

Resonator

A resonator muffler is installed as the first stage in the exhaust system of powerful engines. It consists of a perforated pipe placed in a housing. The body is divided into two or three sections. The energy of the exhaust gases is weakened due to a stepwise reduction in pressure.

installed as the first stage of exhaust energy suppression

The part reduces the force of sound vibrations and maintains engine power with a free flow of exhaust gases.

Restrictive

In restrictive mufflers, the gas flow passes through a diaphragm or cone narrowing, which leads to a decrease in engine power. The acoustic protection of such devices is low, since the diaphragm does not interfere with the rectilinear movement of the sound wave.

Absorption

The damping function for sound vibrations in the absorption muffler is performed by a finely porous non-flammable material located in the space between the perforated pipe and the housing. The design is similar to the resonator type. This type has little effect on power reduction.

Main malfunctions of VAZ 2109 and 2108 mufflers

There are several typical muffler breakdowns that owners of VAZ 2109 and VAZ 2108 cars encounter:

Holes appear in the main muffler housing. Due to high temperatures accompanied by strong vibration, the case simply burns out. The cause can be either thermal or chemical corrosion. The problem is solved by applying a patch and subsequent welding of the damaged body;

The VAZ 2109 muffler burned out due to thermal corrosion

Old VAZ 2108 muffler resonator baffles removed

Muffler pipe of a VAZ 2109, broken at the suspension and knocking on the bottom of the car

Direct-flow car muffler device

When tuning a car, a direct-flow muffler is often installed instead of the usual one. What is this connected with? The fact is that direct flow allows you to solve two problems:

Now that we have figured out what direct flow does, we can study its structure. You can compare what a direct-flow muffler (one of its possible options) and a standard one looks like in the figure below.

As you can see, the difference is that the direct-flow muffler has a simpler device. This simplification allows in many cases to make a homemade forward flow, especially for domestically produced cars, for example, the VAZ 2114.

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

Double muffler assembly sequence

To install the muffler, follow the sequence of operations:

1. The muffler is removed from the car in accordance with the instructions presented above.
2. A hole for a pipe with a diameter of 5 cm is carefully cut out on the side of the muffler body. Then the upper part of the muffler body is carefully cut off, and all resonator partitions are removed. In their place is installed a perforated metal mesh, twisted into a tube.

The VAZ 2109 muffler partitions have been removed, a hole has been cut on the side

A side pipe is welded to the VAZ 2109 muffler body

Two side L-shaped pipes are welded to the VAZ-2109 muffler body

For thermal insulation, glass wool is poured into the VAZ 2109 muffler housing

Homemade muffler with double exhaust for VAZ 2109 is ready

Muffler with double exhaust installed on a VAZ 2109

Replacing a muffler is not a particular problem even for a novice driver. All you need is a viewing hole, a couple of keys and a little patience. But the repair of this device almost always involves welding work. And if the car owner does not have such a skill, then it will not be possible to do without the help of qualified auto mechanics.

Source of the article: https://vazweb.ru/desyatka/vyhlop/zamena-glushitelya-vaz-2109.html

Types of car mufflers

Modern mufflers are divided into three types: dissipative, reactive and combined.

In turn, the above types are divided into two types: direct-flow and labyrinth.

They belong to the type of direct-flow mufflers and have a simple design.

1. Housings;
2. Perforated pipe;
3. Inlet and outlet pipes;
4. Special heat-resistant sound-absorbing filler;
5. Steel mesh;
6. All this is connected by all-welded joints.

The principle of operation is simple - sound-producing exhaust gases enter a chamber from a perforated pipe where they are absorbed by heat-resistant sound-absorbing material, resulting in the energy of sound vibrations being converted into thermal energy. Mineral wool, metal shavings, and glass wool are often used as such materials.

The advantage of such a muffler is that, depending on the design, it allows you to increase engine power by 5 - 7%, because there is practically no resistance to the exhaust gases escaping.

The disadvantage is increased noise, so such products are primarily tuning and are rarely used on ordinary cars, as a rule, only on sports cars.

Structurally, absorbing silencers can be:

1. Strongers or “louvered core glasspack”. They are a pipe with metal petals pressed inside. They are considered ineffective in terms of purging and are rarely used. Mistakenly installed instead of a catalyst.
2. With internal diffuser. Not expensive products that have their pros and cons. In terms of noise reduction, they are more effective than other analogues, but in terms of purging, it’s the opposite. The only tangible plus here is the low price.
3. With perforated cones of different lengths, treat them as a combined solution. The cones are welded into the main perforated pipe, which significantly reduces noise and at the same time the flow of gases is quite satisfactory for many.

The operating principle of such mufflers is based on the effect of damping reflected waves from each other, which leads to a reduction in noise.

• 
  Muffler for VAZ 2107 and exhaust system device

In this design, filling material is not provided; instead, additional pipes, chambers and partitions are welded into the body, chaotically reflecting from which sound waves are damped.

But such mufflers can rarely be found on tuning and sports cars, since their design does not allow achieving good results in terms of aerodynamics, the reason being the high turbulence of the exhaust gases.

Also, in terms of design, reactive analogues are complex and therefore are mainly manufactured in factories.

Diagrams and brief characteristics of reactive mufflers are presented below.

This form embodies design solutions from reactive and dissipative mufflers. For example, you can take devices with perforated cones (see above).

They have good efficiency in terms of noise reduction, but in terms of gas flow, the performance is low.

Device

In total, this system includes several elements. This:

• An exhaust manifold. This is the very first part through which gases pass after combustion. People call the collector a spider for its characteristic shape. This element is supplied to each of the four cylinders of the internal combustion engine. Then all these pipes are combined into two, and then into one single pipe. There are also sports manifolds with a 4-2-1 exhaust pattern. They are installed to increase power. As practice shows, gases move more freely along the path, but the driver still will not feel a significant increase in power.
• Reception pipe. It connects to the collector. There is a special probe inside this pipe. This is an oxygen sensor, or lambda probe. If we talk about the VAZ-2109 exhaust system (carburetor), there is no such sensor in the system. But on car injectors, a lambda probe is required. The slightest problems with it may be accompanied by a “Check Engine” lamp on the instrument panel. In fact, the exhaust pipe has the simplest device. There are no sound-reflecting partitions or special fillers. This is an ordinary hollow pipe in which a single sensor can be located.
• Catalyst. As in the previous case, this element is present only on injection versions. There is no catalyst on carburetor engines. What is this element needed for? Its main task is to reduce the concentration of harmful substances in exhaust gases. Passing through the catalyst honeycomb, harmful metals are converted into harmless oxides. Thanks to the use of this element, the machine began to comply with the environmental standard Euro-2 and higher. The catalyst is the most expensive element in the VAZ-2109 exhaust system (injector). Therefore, when it malfunctions, many install flame arresters or simply knock out the core and weld the walls, leaving the catalyst empty inside.
• Resonator. This element is present on both carburetor and injection versions. A resonator is installed behind the catalyst. What is his task? The resonator serves to absorb the main noise from the exhaust gases. Thanks to this element, the sound of gases becomes less. The resonator is designed simply. This is a metal case with a perforated pipe inside. Additionally, there may be a partition inside.
• Main muffler. The resonator can be called an auxiliary muffler, but the main sound energy is absorbed by the last muffler, located under the rear bumper. It enters the resonator and absorbs up to 90 percent of the sound. The structure of this element is somewhat more complicated. The basis here is also taken from perforated tubes, but there are several of them, as well as chambers. Usually these are three or four tubes and two chambers. Passing through this entire labyrinth, the gases lose their energy and exit without unnecessary sound.

Muffler device (diagram)

The design of the muffler has already been partially discussed, now let’s delve deeper into the topic.

You probably already realized that mufflers have many distinctive features; no devices have the same design; each manufacturer introduces its own innovations to improve the design of its brainchild.

The main goal is to reduce the sound as much as possible without losing engine power.

In a typical production car, the muffler takes from 5 to 7% of the power. To achieve absolute silence, you need to either increase or install an additional device with a resonator, and this will take another 5 to 7% of the power. The total is 10–15%, which no one wants to lose.

Those. It turns out that it is not so easy to make an ideal muffler so that there is little noise and no loss of power.

The design of the product is largely influenced by:

1. Engine capacity;
2. Tuning or regular engine installed;
3. Make of the car and its purpose (sports or regular);
4. Who is the manufacturer.

The classic muffler for most cars consists of:

1. Inlet and outlet pipes;
2. Internal pipes;
3. From two or more expansion chambers;
4. Internal partitions;
5. Helmholtz resonator.

The sound entering the device through the inlet pipe is reflected from the walls and travels a distance of more than 1 km, constantly weakening.

The resonator serves to weaken the most powerful component of the sound wave, which a conventional labyrinth cannot cope with.

The chambers in the muffler are of different sizes because the length of the sound waves is also different.

The inlet pipe, as a rule, has holes and is considered dissipative, since sound entering it is partially dissipated in the first chamber.

The waves move chaotically in space, reflecting from the walls and constantly losing energy. This occurs due to the force of friction against air molecules.

The more of the wave remains in the first chamber, the more the wave attenuates.

The remaining waves pass into the second scattering chamber; however, it is not easy for them to pass from a narrow pipe into open space since, according to the law of acoustics, a sound wave seems to collide with a wall of air.

Part of the wave is not able to enter the second chamber and is reflected back from the interface and partially absorbs the oncoming flow.

The same waves that were able to get into the second chamber are randomly reflected from the walls, absorbing each other and losing energy during friction with the air.

But the main component of the sound wave passes further and enters the Helmholtz resonator.

The sound wave again has to leave the narrow space into the free chamber, and it seems to press on the air in the resonator, creating air vibrations.

This creates a reverse sound wave that has the same frequency as the original one. They collide and destroy each other.

Some of the waves remaining in the second chamber enter another pipe and are transported to the third chamber.

There again, sound loss occurs due to friction with the air, and only after this the weakened wave enters the output pipe, and from there out.

Malfunctions

Due to its simple design, this system is very reliable and rarely requires attention. But nothing lasts forever, so over the years the muffler and other elements burn out. Most often, it is the muffler that fails, as it takes the entire blow. It can burn out both outside and inside. In the latter case, the breakdown can be determined by the loud exhaust sound. Driving with such a muffler is not dangerous, but not very comfortable. Firstly, sound insulation suffers, and secondly, gases can break into the cabin. Therefore, it is better to replace this element immediately, given that it costs a penny.

Noise standards and liability for exceeding them

Responsibility for loud exhaust from a muffler is provided for under Article 8.23 ​​of the Code of Administrative Offenses. The driver is charged for operating a vehicle with excess noise levels in accordance with the Technical Regulations of the Customs Union 018/2011 “On the safety of wheeled vehicles”, paragraph 9.9.

Table: dependence of the maximum permissible sound level on the vehicle category

Category M1, N1 and L are passenger cars with no more than 8 seats, trucks with a permissible maximum weight of no more than 3.5 tons, motorcycles/mopeds/ATVs. Category M2 and N2 are cars with more than 8 seats (except for the driver), but whose maximum weight does not exceed 5 tons, and trucks with a permissible maximum weight from 3.5 to 12 tons, respectively. Category M3 and N3 are full-fledged buses and trucks with a permissible maximum weight of more than 12 tons (trucks, most dump trucks).

According to 12.5.1 of the Code of Administrative Offenses, the driver (or owner) is charged for making changes to the design of the car without the permission of the supervisory authority - the traffic police.

So, the fine for a straight-through muffler can be either a warning plus a fine of 500 rubles, or two fines of 500 rubles each (in practice, two warnings cannot be issued).

The manufacture of a direct-flow muffler and its further improvement is within the power of most car enthusiasts. Despite the restrictions on the operation of such devices in our society, there are more and more people who want to make their own and install a direct-flow muffler on a car. Thanks to detailed instructions with photographs and videos, it will be much easier to make a forward flow.

Didn't find the information you are looking for? on our forum.

About repairs

Some owners resort to muffler repair. But it must be said that such measures, if not useless, are at least temporary. The fact is that gases can break through not only outside the muffler, but also inside. That is, after installing the patch, the exhaust sound will not change. The cost of a new muffler for a “nine” is now about a thousand rubles. And it will last much longer than the old repaired one.

Main muffler for VAZ 21099 with nozzle

Dimensions in packaging (LxWxH), mm

Dimensions in packaging (LxWxH), mm

Payment to Sberbank VISA card

The most convenient and profitable payment method for you. Payment can be made through the Sberbank Online system, through a payment terminal (Sberbank ATM), provided that you have a card from this bank. If you are not a client of this bank and you do not have a card, then you can top up your balance at any bank branch through an operator; they will accept cash payment and top up your balance. Commission from 0 to 1%

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Cash on delivery (payment upon receipt)

The postal commission based on the amount of “Cash on Delivery” for your parcel is described below, i.e. In addition to the delivery cost, the post office will also charge you a commission for .

Postal commission for cash on delivery service:

Attention! Advance payment for delivery 100% (via Sberbank payment). This is included in our Cash on Delivery terms.

Check with the manager for additional information.

Yandex money.

This payment method involves issuing an invoice in the Yandex.Money system.
You will be able to pay from your Yandex.Money wallet. ATTENTION
! There are restrictions on the payment amount: anonymous wallet 15,000 rubles, registered wallet 60,000 rubles, identified wallet 250,000 rubles. After payment you will receive an electronic cash receipt.

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Attention! Regardless of which delivery method you choose, check the integrity of the goods and packaging upon receipt of the cargo (parcel).

After submitting your order to the terminal of the transport company/Russian post office, a track number will be sent to the phone number and email specified in the order, if available, to track the parcel.

Delivery by Russian Post (payment by Sberbank)

Delivery terms

5-21 days depending on the distance of your locality from Togliatti,
cost
from 250 rubles.
depending on the weight, distance and declared value of the parcel (order). 100% prepayment of delivery in advance excludes commissions charged by the post office for cash on delivery.
Official delivery website: https://www.pochta.ru/

Delivery by Russian Post (1 CLASS)

Delivery terms

5-21 days depending on the distance of your locality from Togliatti
100% Advance payment of ORDER + DELIVERY
.
cost
will be announced by the manager when confirming the order. Official delivery website: https://www.pochta.ru/

Russian Post (payment upon receipt)

Delivery terms

5-21 days depending on the distance of your locality from Tolyatti
Cost
from 250 rubles. depending on the weight, distance and declared value of the parcel (order). Official delivery website: https://www.pochta.ru/

EMS company

is a division of Russian Post, part of the global EMS (Express Mail Service) system. Express delivery worldwide.

Delivery terms

from 3-7 days.
Cost
from 550 rubles. Official delivery website: https://www.pochta.ru/emspost/

How to replace?

Based on the above, we can conclude that the best muffler repair is to replace it. This statement is also relevant for other parts of the VAZ-2109 exhaust system. The muffler is replaced with an inspection hole, a 13mm spanner and a socket of the same size. All actions are performed step by step:

• The car is driven into the inspection hole and put into gear.
• The main muffler is disconnected from the resonator. To do this you need to find a clamp. Use a spanner to tighten the fastening nut (to prevent twisting). At this time, the bolt is unscrewed with a ratchet.
• Afterwards, the fasteners are removed and the elements of the exhaust system are disconnected. The clamp is reusable, so we will put it back.
• Carefully remove the front part of the muffler from the rubber “cushion”, through which the part is attached to the body. Then the same operation is done with the front “pillows”.
• If the muffler is stuck to the resonator pipe, it can be rotated counterclockwise and back. This makes it easier to remove the muffler.
• The new element is installed in the reverse order.

Please note that rubber pads may be torn. It's better to buy a spare set. On the “nines” they are very flimsy. It is advisable to install pillows made of durable material (for example, polyurethane). This will not affect comfort (there will be no more vibrations), but the resource is at least twice as long.

Removal and restoration of the main muffler

Quite often, when using a VAZ 2109 car, problems arise with the performance of the muffler. This often happens as a result of careless driving when the car hits a bump or hole. A hole appears, which disrupts the work. The operation of a vehicle with a damaged exhaust gas exhaust system is limited by special technical regulations. One way or another, to restore functionality, it is necessary to repair the element responsible for neutralizing sound vibrations.

The problem can be solved using two methods. The first method does not involve serious manipulations; it is enough to replace the old muffler with a new one. The second method allows you to restore the damaged element by eliminating the consequences by welding. Using a welding machine for repair purposes is only possible if you have the appropriate experience.

Without proper preparation, it is better to seek help from specialists. But despite this, replacing the muffler is a necessary step. To do this, you need to know the specifics of the repair process. To begin with, you should prepare your working tools. More convenient removal of the muffler is facilitated by the presence of a 13 socket head and a key designed in a special way, which is often called a ratchet.

Source

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.

Racks ss20 for VAZ 2112

SS20 spare parts are manufactured using innovative design technologies proven over many years of service. The company's modern solutions will help you significantly improve vehicle handling and increase driving comfort.

• 
  Muffler for Priora

It is important that struts and shock absorbers extend the service life of the suspension of VAZ cars, without requiring repairs for a long time. Reliability, warranty period and confidence in your spare parts - everyone will find all these components in SS20 spare parts

A wide range of original suspension parts for Russian and foreign cars includes supports, front and rear struts, steering mechanisms, spacers and many other spare parts. In total, the plant's product line is about 250 items.

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.

What is needed for such an upgrade?

• cylinder head 16V,
• equipped with collectors and receiver,
• MZ,
• knock sensor,
• a throttle pipe having a throttle position sensor, an idle speed regulator,
• DMRV,
• exhaust pipe with DC,
• thermostat with sensor,
• both videos
• camshaft pulleys,
• phase sensor,
• timing cover,
• wiring kit,
• controller,
• fully equipped fuel line and gas tank,
• oil level indicator and sensor,
• HF position sensor,
• ramp with a set of nozzles,
• pistons with rings and pins,
• generator with brackets and tensioner,
• crankshaft pulley,
• connecting rods,
• generator drive,
• oil pump housing with ebb for HF position sensor,
• exhaust system included.

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I am a professional in the field of Auto Electrics and Auto Diagnostics. Work experience more than 10 years. I will identify and eliminate faults of any complexity. (Even with cars that Dealers and services cannot handle, as it were, of the highest class). We carry out all types of work on the installation of additional electrical equipment (xenon, multimedia system, special signals, etc.)

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.

Replacing a return flow muffler with a direct flow one with your own hands

When manufacturing a direct flow, it is advisable to use the positive properties of several types of structures.

Reasons for replacing a standard muffler with a direct-flow muffler

Car owners change the factory muffler to a direct flow one for several reasons:

Tools and materials for work

A direct-flow muffler is often purchased, but for lovers of tools and an insatiable thirst for creativity, we recommend making it yourself. It is preferable to make parts from stainless steel with a thickness of 0.8–2.0 mm. Select ferrous metal blanks with a thickness of 1.0–1.5 mm for the case, the rest 2.0–4.0 mm to avoid premature burnout of parts, and also use standard blanks. For the body, use a suitable size: a fire extinguisher, a thermos, an empty gas or scuba cylinder.

To fill the muffler chamber, non-flammable porous material or a combination of them is used:

Reworking an old muffler

from the old muffler we cut out everything that is not needed; a small number of small holes will help preserve the rich bass rumble from the engine during the exhaust.
Keep in mind that through large holes and grooves the mineral wool fibers will be “blown out” of the chamber faster.

Stainless steel helps to increase the service life of parts and mechanisms several times

In the future, the diameter of the inner pipe can be reduced by simple manipulations, but increasing it is disproportionately more difficult.

We cut the length of the pipe to the required size We cover the internal perforation with fine-porous non-flammable material We strengthen the perforation, reducing its permeability to mineral wool We carry out welding in compliance with all safety rules The presence of several chambers contributes to greater functionality of the muffler

Working with mineral wool requires personal protective equipment.

the absence of a metal mesh between the holes and the wool will lead to a faster “blowing” of the wool out of the muffler

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:

1. Replace with a new one. Practical, easy and fast. You can do this kind of work with your own hands without any problems.
2. 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 VAZ exhaust system

Replacing the main muffler

To remove the muffler, follow fairly simple step-by-step instructions.

1. Arm yourself with a 13mm deep socket socket, a 13mm spanner and a ratchet.
2. 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.
3. Wait until the entire exhaust system has cooled completely, otherwise burns will occur.
4. 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.
5. After unscrewing the bolt, remove the fasteners, disconnect the exhaust system elements, remove the clamp and free the main muffler from the resonator.
6. Carefully remove the front part of the silencer from the rubberized suspension.
7. Remove it from the rear suspensions and pull the damaged element out.
8. 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.
9. Reassembly is carried out according to the instructions provided, only in the opposite sequence.

Replacing the VAZ resonator and muffler
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.

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.

Changing the catalyst

Let’s say right away that failure of the catalyst on a VAZ 2109 is quite a rarity. But it will not be superfluous for anyone to understand the features of replacing this element.

When the engine is running, the catalyst heats up to 600 degrees Celsius, so it takes longer to cool down than a pair of mufflers. Make sure the element is cool before starting work.

To dismantle and replace devices you need:

• Disconnect the additional muffler from the catalyst. To do this, hold the nuts with a spanner wrench, and unscrew the fastening bolts with a second tool;
• Using a similar method, the bolts connecting the catalyst and the receiving pipe are unscrewed from their places;
• Next, the catalyst is carefully removed from the rubber hangers;
• We take a new catalyst and install it in the reverse order.

The exhaust system provided for the VAZ 2109 model is outrageously simple. This pleasantly pleases the owners, since they do not need to spend a lot of effort, time and money on repairs. Most of the work is done independently.

Replacing “pants” (intake pipe) VAZ 2108 2109 21099

A faulty muffler on cars of the VAZ 2108 and VAZ 2109 line can become a source of headache for the driver. Both literally and figuratively. There is nothing good about a car engine roaring like a jet turbine. And the exhaust from such a car becomes more toxic. Is it possible to repair a broken muffler yourself? Of course: this is easier to do than it seems.