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

System of production of the fulfilled gases - the general information, removal and installation

General information

The system of production of the fulfilled gases of all considered models consists of three sections: reception, average (intermediate) and back. Basic elements of system are: a reception pipe, the catalytic converter, mufflers (intermediate and main), connecting tubular sections, fixing collars, and also basic arms and rubber loops by means of which final assembly is suspended to the car bottom. Sections of system are interfaced among themselves by means of one homutny connection (forward section to intermediate) and one flange (intermediate section from back). The joint of average and back sections of system is sprung that allows to compensate the side play arising during the movement of the car, for the purpose of decrease in level of vibrations the reception section of system usually joins a flexible insert. The wrong installation of components and sections of system leads to increase in level of the noise and vibrations transferred to a car body.

Typical design of system of production of the fulfilled gases

1 — the Bolt
2 — the Conic spring
3 — the Reception pipe
4 — the Catalytic converter

5 — the Lock bracket
6 — the Damping ring
7 — the Central muffler with the central pipe
8 — the Main muffler with an exhaust pipe

Regularly examine all system on existence of traces of corrosion, deformations and mechanical damages. Check reliability of tightening of fixture. Violation of tightness of components and their joints is fraught with hit of the fulfilled gases in interior of the car. Defective components and sections are subject to replacement.

At strong damage of system by corrosion for undocking of its sections the gas cutting torch can be required (it is alternatively possible to use a hacksaw or a pneumatic chisel - do not forget to put on goggles and gloves).


Repair of system has to be made in the following order:
  1. At removal of components move along a path of system in the direction from an exhaust pipe to the engine;
  2. Previously oil fixture which is subject to an otpuskaniye getting;
  3. Beforehand prepare necessary replaceable laying, suspended loops, collars and fixture;
  4. Before installation grease a carving part of fixture with the anti-taking sealant;
  5. At installation of components you watch that between sections of system and nearby elements of a suspension bracket/body there was a sufficient gap. Pay special attention to correctness of installation and reliability of fastening of the thermofilter of the catalytic converter.


Each section of system can be dismantled separately. Also there is a possibility of removal of all final path assembled. Even if only the separate section needs replacement, it is simpler to dismantle it after preliminary removal of all assembly.


  1. Car front also establish to Poddomkratta it on props (at the corresponding equipment of the platform it is possible to tire out the car on a platform or a viewing hole). At the corresponding complete set remove protection of a case.
  2. Spray all elements of system of release by means for dissolution of a rust and wait until the rust is dissolved.
  3. Weaken a collar of fastening of the main muffler.
  4. Take out the muffler from the rubber holder and disconnect it from the central pipe.
  5. Disconnect a reception pipe from a final collector.

Fastening of a reception pipe to a final collector
And — OHC Engines
In — DOHC Engines

  1. On the diesel engine turn out bolts of fastening and disconnect a reception pipe from the holder.

Fastening of a reception pipe to the holder

  1. Take out system of release from rubber holders.

The catalytic converter is sensitive to blows, do not strike it and do not drop.



  1. Collect a forward part of system of release, without tightening bolts. Apply surely new bolts, consolidations and the damping rings. The interfaced surfaces should be cleared previously.
  2. It is recommended to grease all bolts with high-temperature lubricant, for example, of Liqui Moly LN-508-ASC that will facilitate the following dismantling of connections.
  3. Ask the assistant to raise system of release or prop up it wooden linings.
  4. Suspend the central muffler on rubber holders.
  5. Establish a reception pipe on a final collector with new consolidation and fix by new bolts, without tightening them.
  6. On the diesel engine fix a reception pipe on the holder.
  7. Put on the main muffler behind a reception pipe. Previously pull a collar over a connecting pipe of the muffler. On cars from 09.1996 g of release the collar is welded on a pipe of the main muffler.
  8. Suspend the main muffler on the rubber holder.
  9. Before an inhaling of threaded connections expose system of release according to a car bottom contour so that the system did not test mechanical tension. You watch that everywhere there was enough place between elements of system and a body and rubber holders were evenly loaded.
  10. Tighten bolts with the required effort.
  11. Lower the car on the earth.

Instructions on replacement of the system of release installed at manufacturer

Places of a cut in front of the central muffler when replacing the muffler (1) and catalytic converter (2) are specified on an accompanying illustration. The arrow specifies in the direction of the movement of the car.

Places of a cut in front of the central muffler
1 — 60 5 mm
2 — 322 - 5 mm

If the central muffler (3) and the catalytic converter (1) are replaced, the connecting coupling (4) 162 x 45 mm in size with collars is installed (2)

Installation of the connecting coupling