Audi 80/90/Coupe

since 1986-1991 of release

Repair and car operation



Audi 80/90/Coupe
+ 1.2. Car identification
+ 2. Engines, carburetors
3. Greasing system
+ 4. Cooling system
+ 5. Fuel system
- 6. Exhaust system
   6.1. Components of an exhaust system
+ 7. Ignition system
+ 8. Transmission
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
+ 13. Central air
+ 14. Electric equipment


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6. Exhaust system

6.1. Components of an exhaust system

GENERAL INFORMATION

Exhaust system, arrangement of components (4-cylinder models)


1. A tube for measurement WITH
2. A tube cap for measurement WITH
3. 25 N of m.
4. Final collector
5. 30 N of m.
6. Consolidation
always replace
7. 35 N of m.
8. 40 N of m.
9. Average exhaust silencer
average and back exhaust silencers are established at plant as a uniform detail, spare average and back exhaust silencers are delivered separately together with the tightening coupling
10. Fixing ring
preliminary tightness: approximately 7мм
pay attention to arrows in a tab A
11. Depth of introduction "and" should be at least 42.5 mm
12. Tightening coupling
13. 40 N of m.
14. Fixing rings
preliminary tightness: about 12 mm
15. Back exhaust silencer
16. A cut place for replacement
it is noted by cuts (3) on a circle of a connecting pipe
cut a pipe at right angle to a pipe axis
in the established situation the cut can be made a chain saw
the cut can be made also, having removed system
to remove an exhaust system, weaken a clip ahead of the average exhaust silencer and fastening of the left bottom shock-absorber, also lower a back axis
17. Tightening coupling
18. 40 N of m.
19. Catalytic converter
20. A tube for measurement WITH
21. Oxygen sensor (50 N of m)
cover a carving with G5 structure
do not allow G5 to get to cuts on the sensor case
22. Basic arm
it is attached to transmission
23. 25 N of m.
24. Exhaust pipe

Prevention

After work over an exhaust system check, that in connections there was no preliminary tightness and there was a sufficient interval between system and a body. If necessary weaken fixing clips and adjust position of the exhaust silencer and an exhaust pipe, turning and moving them in the longitudinal direction to receive a sufficient interval and evenly to load fixing rings.

Always replace everything самоконтрящиеся nuts.


Exhaust system, arrangement of components (5-cylinder models)

1. A tube cap for measurement WITH
2. 30 N of m.
3. 25 N of m.
4. Final collector
5. Consolidation
6. 35 N of m.
7. 25 N of m.
8. Spring
9. Sealing ring
always replace
10. Tightening coupling
depth of introduction "and" should be at least 42.5 mm
11. Fixing rings
preliminary tightness: about 7 mm
pay attention to arrows in a tab A
12. Average exhaust silencer
13. Back exhaust silencer
average and back exhaust silencers are established at plant as a uniform detail, spare average and back exhaust silencers are delivered separately together with the tightening coupling
14. Fixing ring
preliminary tightness: about 12 mm
15. A cut place for replacement
it is noted by cuts (3) on a circle of a connecting pipe
cut a pipe at right angle to a pipe axis
in the established situation the cut can be made a chain saw
the cut can be made also, having removed system
to remove an exhaust system, weaken a clip ahead of the average exhaust silencer and fastening of the left bottom shock-absorber, also lower a back axis
16. 40 N of m.
17. 40 N of m.
18. Tightening coupling
19. Catalytic converter
20. Oxygen sensor (50 N of m)
cover a carving with G5 structure
do not allow G5 to get to cuts on the sensor case
21. Basic arm
it is attached to transmission
22. Forward exhaust pipe
23. A tube for measurement WITH

Exhaust system, arrangement of components (Compartment model)

1. Laying
replace
2. 10 N of m.
3. Heat-shielding screen
4. 25 N of m.
5. A tube for measurement WITH
6. 30 N of m.
7. Final collector
8. Oxygen sensor (50 N of m)
9. Ring consolidation, replace
10. Catalytic converter
11. Tightening coupling
12. Fixing rings
at replacement make sure that new rings correspond to the old
13. Back exhaust silencer
14. Forward exhaust pipe
15. Fixing rings
at replacement make sure that new rings correspond to the old
16. Central exhaust silencer

Exhaust system, arrangement of components for all-wheel drive (4х4) models

1. A tube cap for measurement WITH
2. 30 N of m.
3. 25 N of m.
4. Final collector
5. Consolidation
6. 35 N of m.
7. 25 N of m.
8. Spring
9. Sealing ring
10. 40 N of m.
11. Fixing ring
12. Average exhaust silencer
13. Sealing ring
always replace
14. 25 N of m.
15. Fixing ring
preliminary tightness: about 12 mm
16. Back exhaust silencer
17. Tightening coupling
18. Catalytic converter
19. Oxygen sensor (50 N of m)
cover a carving with G5 structure
20. Basic arm
it is attached to transmission
21. Forward exhaust pipe
22. A tube for measurement WITH

Prevention

The carving of the oxygen sensor is covered with protivozadirochny structure. Do not allow structure to get to sensor cuts.

After work over an exhaust system check, that in connections there was no preliminary tightness and there was a sufficient interval between system and a body. If necessary weaken fixing clips and adjust position of the exhaust silencer and an exhaust pipe, turning and moving them in the longitudinal direction to receive a sufficient interval and evenly to load fixing rings.

Always replace everything самоконтрящиеся nuts.


Exhaust system, arrangement of components for 20-klapannny models

1. 20 N of m.
2. A hose to a heater of soaked-up air
3. Heat-shielding screen
4. A tube for measurement WITH
5. Valve of a retsirkulyatsiya of exhaust gases (RVG)
6. Vacuum tube of RVG
7. "Banjo" bolts, 20 N of m.
9. Final cranked branch pipe
10. Main pipe
11. 30 N of m.
12. Fixing ring
preliminary tightness: about 8 mm
13. Jet exhaust silencer

14. 25 N of m.
15. 30 N of m.
16. Oxygen sensor, 50 N of m.
cover a carving with G5 structure, but do not allow structure to get to cuts on the sensor case
17. 20 N of m.
18. Catalytic converter
19. 25 N of m.
20. Sealing washer, 20 N of m.
21. Tightening coupling, 40 N of m.
22. 25 N of m.
23. Tightening coupling, 40 N of m.
24. Back exhaust silencer


Vacuum connections (Compartment model)
1. Return топливопровод
2. Submitting топливопровод
3. Head of cylinders
4. Ventilating hoses of a case
5. To the device of blocking of differential
6. Throttle case
7. A cover of soaked-up air
8. Air batcher
9. Coal filter
10. Pressure regulator
11. Locking valve
12. Electromagnetic valve of the coal filter
13. Inlet collector
14. Valve of stabilization of idling
15. Air filter

Vacuum connections (Audi-90 models)


1. The electromagnetic valve (N 80) for the coal filter
2. Throttle case
3. RVG valve
4. Fuel injector
5. Locking valve
6. Case ventilation
7. To the fuel tank
8. Fuel distributor
9. From the fuel filter
10. Inlet collector
11. Valve of stabilization of idling
12. Head of cylinders
13. Vacuum connection of the amplifier of brake system
14а. A cap (cars with a forward drive without the conditioner)
14b. Connections of the conditioner or differential blocking
14с. Connections of blocking of differential (all-wheel drive cars with the conditioner)
14d. Conditioner connection (all-wheel drive cars with the conditioner)
15. Vacuum tank
16. RVG frequency valve (N 121)
17. Coal filter