Service of Audi A4 from 2001 to 2005 release.
	1. Operation and maintenance of the car
	2. Engine
		2.1. General information
		2.2. Predvaritlny checks
		2.3. Mekhanichsky part (petrol engines 2,0l)
		2.4. Lubrication system
		2.5. Cooling system
		2.6. System of injection
		2.7. System of production of the fulfilled gases
			2.7.1. Separation of the additional and main muffler
			2.7.2. Removal and installation of a reception pipe
			2.7.3. Free installation of final system
		2.8. Mechanical part (petrol engines 3,0; 3,2 l)
		2.9. Mechanical part (petrol engines of 4,2 l)
		2.10. Mechanical part (diesel engines of 2,0 l)
		2.11. Tables
	3. Transmission
	4. Running gear
	5. Steering mechanism
	6. Brake system
	7. Onboard electric equipment
	8. Body
	9. Schemes of electric equipment

2-7-1-razedinenie-dopolnitelnogo-i-osnovnogo-glushitelya.html

2.7.1. Separation of the additional and main muffler

For separate replacement of the additional or main muffler on a connecting pipe the place of a section is provided.

The place of a section is designated on an exhaust pipe by a vyshtampovanny flute on pipe perimeter.

Operating procedure

Fig. 2.292. Places of a section of exhaust pipes

Cut exhaust pipes in the place of a section perpendicularly by means of a chain truborez (fig. 2.292).

Fig. 2.293. Installation of tightening collars

At installation arrange tightening collars 1 and 2 coaxially to a section (fig. 2.293).

Fig. 2.294. Scheme of installation of tightening collars

Establish tightening collars so that the ends of bolts did not go beyond bottom edge of a collar (fig. 2.294).

Threaded connections are directed outside.

Level reception pipes freely.

Evenly tighten threaded connections of tightening collars the moment of 23 N · m.