The muffler is a very important design detail of the graduation system, without which the operation of the modern vehicle is simply impossible. Timely repair of this element will allow you to avoid more significant costs. It is about this to every motorist just need to know what is a silencer and how to repair it with his own hands.

Device of the muffler

The car muffler is designed to perform the following main functions:

1. Significantly reduces the noise level of exhaust gases.
2. Converts exhaust gas energy, reduces their speed, ripple and temperature.

The spent gases that leave the motor cylinders have considerable pressure. When the spent gases move along the graduation system, sound waves are produced that apply to faster gases.

The energy of sound oscillations using the silencer is converted into heat energy, which reduces the noise level to the required indicator. However, the use of the muffler creates a backpressure in the exhaust system, which produces to a slight decrease in the power of the motor.

A number of technologies to reduce noise reduction technologies are used in the muffler:

1. Absorption of auditory waves.
2. Interference sound waves.
3. Change of stream direction.
4. Flow expansion.

As a rule, these technologies are used in silencers comprehensively, to achieve maximum effect.

In modern vehicles, it can be installed up to five silencers, although they are mostly two. The nearest muffler is called the front, pre-muffler or resonator. Next follows the rear or main muffler. For each particular brand of vehicle and the motor model, their set of silencers are used.

The resonator pre-reduces the noise level and balances the pulsations of the flow of exhaust gases. The main muffler serves for final noise reduction.

Buried the muffler, reasons

Although silencers are made of sufficiently strong materials - special alloys, stainless steel, in some cases even titanium, from the inside all the time have their effects heated to large temperatures aggressive gases, the moisture and cold outer air are constantly operating on the silencer. In addition, they also affect the chemistry that the road covering is sprinkled in ice. Often you can meet mechanical damage - bad roads, borders or sewer hatches.

Several main factors can be distinguished, which affect the premature yield of the silencer:

1. The effects of exhaust aggressive gases.
2. Mechanical damage.
3. Cold air outside, because of which the temperature difference is obtained.
4. Vibration.
5. Chemical reagents.

Burned silencer, signs of breakdown

There are a number of major silencer malfunction symptoms:

1. The characteristic sound of recycled exhaust gases (if the vehicle has become much noiser) or the appearance of black smoke. In such a situation, breakdown is the next - metal noise under the bottom of the car appears due to the silencer breakdown. This can occur as a result of corrosion, metal fatigue from the effect of high temperatures or external impact. In addition, such symptoms may appear if a piece inside the exhaust system falls off due to the silencer's slot. On most modern cars, when the exhaust gas output system fails, the Check Engine lamp lights up on the instrument panel. It is worth noting that the symptoms of this breakdown can be the difficult launch of the motor or its reduced power.
2. Another malfunction can be increased vibration or knocks. Their source is likely to be a silencer, which swinging on worn supports or internal burned, torn or chatting mesh partitions inside the resonator.

Materials for repair, all you need for the repair of the muffler

After the reason for the silencer breakdown is defined, you should set your further actions. At the same time you have several options. The simplest of them is a trip to the car service, where highly qualified specialists work and the necessary equipment is available. As a rule, the silencer will be replaced with a new one, but it will be hidden. In addition to extra expenses, no one will give you warranty that a new item will last longer than the old one. To date, there are many poor-quality fakes on the market, it is advisable to repair the muffler on their own.

To repair the silencer on its own, you will need such materials and tools:

1. Means for degreasing.
2. Heat-resistant sealant.
3. Welding machine.
4. Hammers.
5. Screwdrivers.
6. WD-40 liquid.
7. Set of wrenches.

Heat-resistant sealant for silencer, what to choose

When purchasing heat-resistant sealant for the muffler, it should be extremely attentive, since the temperature of the exhaust gases is able to reach thousands of degrees Celsius.

Currently, heat-resistant sealants for the muffler are presented very widely, they differ with the maximum operating temperature and the weight of the tube. Do not save on such sealants - choose this material guided by the task you want to solve.

It is better to purchase more expensive sealant, however, more qualitative and efficient, which will endure even the highest temperatures.

Repair of the muffler do it yourself, step by step instructions

Before starting repair work, it is necessary to dismantle the muffler. To do this, drive the vehicle to the observation pit or the flight. It is advisable to substitute the stops under all the wheels. You should not neglect these security measures - such insurance is very important. Now it is necessary to prepare the surface of the silencer - clean from dirt and other layers, then degrease.

It is desirable to begin the process of dismantling the muffler with the processing of the required compounds with a special fluid that has the necessary liquidity. To do this, it is quite suitable WD-40, you can still apply kerosene or vinegar. If the exhaust parts are connected by flanges with a connecting ring, then as a result of the burning of the items to each other or corrosion, complex situations may occur. It is also solved with WD-40.

If, due to the effects of high temperatures or corrosion, end-to-end holes were formed, they need to be embedded using a special heat-resistant sealant. We clean the surface of the silencer from various contaminants and put the sealant to the desired places.

In the case of too much progres, even the highest quality and efficient sealant can help, you can apply fiberglass. It can be freely found in almost every automata. The latch must be installed on the epoxy resin. Whatever grapplation was better, it is necessary to drive a motor about half an hour at idle.

Repair of the silencer welding

Now we unscrew the flanges, the fastening bolts and remove the muffler. Then you need to examine it. In the absence of external damage, it is not necessary to rejoice.

Most often in such cases, the cause of the breakage is the resonator. You will have to cut it off and breed a new one for the released place. Such work is quite subtle and not every welder can cope with it. This requires the appropriate equipment and a highly qualified experienced specialist.

Replacing the silencer corrugations with their own hands, step-by-step instructions, professional advice

Corrugation traditionally consider the weakest detail of the exhaust system. It is represented as an elastic connection of the motor and exhaust pipe.

Corrugation is designed to neutralize vibrations during the engine operation of the vehicle. It must be paid to it, because it is precisely it very often causes faults.

Problems with corrugations can begin as a result:

1. Catalyst damage.
2. Mechanical damage.
3. Damage to the corrosion of the walls of the node as a result of the effects of exhaust gases.

Replace the corrugations, in fact, quite easy. It is necessary to arm the grinder and cut off the damaged element. Then you should clean the edges and weld with the welding machine a new part. Now we need to test the tightness of the node and paint it for durability. Although you spend your strength and time, the result will be worth it. You will be a hundred percent sure of the quality of work, as they did it alone. In addition, the benefit is obvious and from a financial point of view.