Audi A4, S4
Introduction
Controls and receptions of safe operation
Current leaving and service
The engine
Systems of cooling, heating and the air conditioner
- Power supply systems, release and decrease in toxicity of the fulfilled gases
    Power supply systems of petrol and diesel engines
    System of injection of fuel of the petrol engine
    System of injection of fuel of the diesel engine
   - Systems of release and decrease in toxicity of the fulfilled gases. Турбокомпрессор
      Removal and installation of system of release. Replacement of the central, additional muffler, a trailer pipe
      Updating of a lining of system of release / a trailer pipe
      Systems of decrease in toxicity of release - the general information
      The Katalitichesky converter
      Removal and installation catalytic the converter and ljambda-probes
      Турбокомпрессор - the general information and safety measures
      Интеркулер - the general information
Systems of an electric equipment of the engine
Manual box of a gear change
Automatic transmission
Coupling, power shafts and differential
Brake system
Suspension bracket and steering
Body
Onboard electric equipment




Systems of release and decrease in toxicity of the fulfilled gases. Турбокомпрессор

Removal and installation of system of release. Replacement of the central, additional muffler, a trailer pipe

The system of release of the fulfilled gases of the petrol engine consists of a final collector, a reception pipe, catalytic (their) converter (pour), the central muffler, a connecting pipe, the additional muffler and a trailer pipe (trailer pipes).

The petrol engine of 2.0 l

System of release of the fulfilled gases. The engine of 2.0 l ALT

1 — the Preliminary muffler. In initial execution together with the additional muffler. In case of repair it can separately be replaced
2 — the Bolt *, 25Нм. Necessarily replace
3/4 — the Suspension bracket
5 — the Bolt, 25Нм
6 — the Nut *, 30Нм
7 — Sealing прокладка*
8 — the Final collector
9 — the Katalitichesky converter. Do not drop
10 — the Dokatalitichesky ljambda-probe 1, 55Нм
11 — the Postkatalitichesky ljambda-probe 2, 55Нм
Instructions: Grease with high-temperature paste G 052 112 А3 only a carving of both gauges. Paste should not get on a groove of the case of the gauge.
12 — Sealing прокладка*

13 — the Reception pipe of system of release with a connecting element. An element do not incline on a corner more than 10
14 — the Suspension bracket
15 — Klemmnaja the plug
16 — the Nut, 40Нм
17 — the Collar, 25Нм
18 — the Tip
19 — the Suspension bracket
20 — the Nut, 25Нм
21 — the Additional muffler. In initial execution together with the preliminary muffler. In case of repair it can separately be replaced
22 — Klemmnaja the plug
23 — the Nut, 40Нм
24 — the Bolt, 25Нм
25 — the Suspension bracket
*) Necessarily replace.

Elements of system of release can be replaced separately. In the initial equipment preliminary and additional mufflers represent uniform knot. The central and additional mufflers at repair can be disconnected from each other, and are on sale separately as spare parts.

Operation of lifting and car installation on supports is connected with danger! Therefore before operation carrying out familiarise with Razdelom Poddomkrachivanie and towage.

 PERFORMANCE ORDER

    Lift and establish the car on supports, remove the bottom cover of the engine, address to Section Removal and installation of the top cover of the engine / the bottom protection of an impellent compartment/stretcher. Spray all bolts and nuts of system of release by means for dissolution of a rust and wait some time. Turn out bolts on a connecting flange каталитический the converter / a reception pipe.

If the release system has to act in film together with catalytic the converter, turn out fastening bolts on a flange a final collector/katalitichesky the converter and remove ljambda-probes, address to Section Removal and installation catalytic the converter and ljambda-probes.

    Disconnect a forward cross-beam of fastening of system of release.

Do not bend a flexible connecting element in a reception требе more than on 10 , otherwise it can be damaged. By means of the assistant disconnect and remove system of release from collars.

The diesel engine of 2.5 l

Removal of preliminary and additional mufflers

System of release of the fulfilled gases. The diesel engine of 2.5 l

1 — the Bolt, 23Нм
2 — the Suspension bracket. At installation of the marksman should show in a direction of movement of the car
3 — the Central muffler. In the initial equipment of the car knot together with the additional muffler. In case of repair it can separately be replaced
4 — the Preliminary pipe of the muffler with two catalyticи converters, with a connecting element. Do not bend an element on a corner more than 10
5 — Sealing прокладка*
6 — Preliminary каталитический the converter
7 — the Nut, 25Нм
8 — Turbokompressor
9 — the Nut, 25Нм
10 — Klemmnaja the plug a lobby
11 — the Nut, 40Нм

12 — the Additional muffler. In initial execution together with the central muffler. In case of repair it can separately be replaced
13 — the Suspension bracket
14 — the Bolt, 23Нм
15 — the Additional muffler. In initial execution together with the central muffler. In case of repair it can separately be replaced
16 — the Nut, 23Нм
17 — the Nut, 40Нм
18 — Klemmnaja the plug back. Before fastening expose release system so that it has occupied the position. Boltovye connections should be turned to the right
*) Necessarily replace.

If preliminary and additional mufflers yet were not replaced, for separate replacement it is necessary to cut them in certain points. The division place is noted by small hollows on a pipe of the muffler.

 PERFORMANCE ORDER

    Cut off a pipe ножовкой on labels. Lateral labels show, the plug can be how much far shifted клеммная.
    Disconnect the muffler from rubber holders and take out.

Installation of system of release

Sealing linings, nuts and bolts should be replaced necessarily. For simplification of later dismantling of system of release it is recommended to grease bolts and nuts of fastening with high-temperature paste, for example, Liqui Moly LM-508-ASC.

Do not bend a flexible connecting element of a reception pipe more than on 10 , otherwise it can be damaged.

 PERFORMANCE ORDER

    Establish system of release by means of the assistant in rubber holders. Fix a forward cross-beam the moment 25Нм on the car bottom. Fix system of release at a flange with the new sealing ring, new bolts and nuts. Observe the tightening moments. If ljambda-probes acted in film, establish them, address to Section Removal and installation catalytic the converter and ljambda-probes.

Installation of preliminary and additional mufflers

If preliminary or additional mufflers only acted in film, fix mufflers new collars.

 PERFORMANCE ORDER

    Arrange клеммную the plug (1) on the middle реза. The klemmnaja plug (1) should settle down horizontally, bolts should show to the left.
    Establish клеммную the plug so that the end of a bolt did not support its bottom edge.
    In regular intervals tighten bolts the moment 40Нм. Expose release system so that it settled down freely, without pressure and deformations. Establish into place the bottom cover of the engine.

Replacement of a trailer pipe

 PERFORMANCE ORDER

    Cut off ножовкой a trailer pipe (1) in a division place ().
    Shift a trailer pipe (3) to a label (). Thus combine a cut on a trailer pipe with a label (). Tighten a collar (2) moment 25Нм. Expose a trailer pipe.

Check of system of release on tightness

At cars with regulated catalytic the converter негерметичность release systems can lead to difficulties in engine start. The engine stops, shivers at work on single turns, twitches at increase in number of turns.

 PERFORMANCE ORDER

    Start the engine and at the working engine close system of release by a rag. Hear to release system. If necessary, spray places of connections a head of cylinders / a final collector and a final collector / a reception pipe means for search of leaks. Check up, whether there are bubbles. Eliminate негерметичность.