Audi 80/90/Coupe

since 1986-1991 release

Repair and operation of the car



Audi 80/90/Coupe
+ 1.2. Identification of the car
+ 2. Engines, carburetors
3. Lubrication system
+ 4. Cooling system
+ 5. Fuel system
- 6. Exhaust system
   6.1. Components of the exhaust system
+ 7. System of ignition
+ 8. Transmission
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
+ 13. Air conditioning system
+ 14. Electric equipment


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6. Exhaust system

6.1. Components of the 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 muffler
average and back mufflers are installed at the plant as a uniform detail, spare average and back mufflers are delivered separately together with the tightening coupling
10. Fixing ring
preliminary tightness: about 7 mm
pay attention to arrows in a tab A
11. Depth of introduction "and" has to be at least 42.5 mm
12. Tightening coupling
13. 40 N. of m.
14. Fixing rings
preliminary tightness: about 12 mm
15. Back muffler
16. The place of a section 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 section can be made a chain saw
the section can also be made, having removed system
to remove the exhaust system, weaken a clip ahead of the average muffler and fastening of the left lower 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 structure of G5
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 the 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 the fixing clips and adjust position of the muffler 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" has to be at least 42.5 mm
11. Fixing rings
preliminary tightness: about 7 mm
pay attention to arrows in a tab A
12. Average muffler
13. Back muffler
average and back mufflers are installed at the plant as a uniform detail, spare average and back mufflers are delivered separately together with the tightening coupling
14. Fixing ring
preliminary tightness: about 12 mm
15. The place of a section 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 section can be made a chain saw
the section can also be made, having removed system
to remove the exhaust system, weaken a clip ahead of the average muffler and fastening of the left lower 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 structure of G5
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 (Coupet's 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
when replacing make sure that new rings correspond to old
13. Back muffler
14. Forward exhaust pipe
15. Fixing rings
when replacing make sure that new rings correspond to old
16. Central muffler

The 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 muffler
13. Sealing ring
always replace
14. 25 N. of m.
15. Fixing ring
preliminary tightness: about 12 mm
16. Back muffler
17. Tightening coupling
18. Catalytic converter
19. Oxygen sensor (50 N. of m)
cover a carving with structure of G5
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 by protivozadirochny structure. Do not allow structure to get to sensor cuts.

After work over the 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 the fixing clips and adjust position of the muffler 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.


The exhaust system, arrangement of components for 20-klapannny models

1. 20 N. of m.
2. A hose to the heater of the soaked-up air
3. Heat-shielding screen
4. A tube for measurement WITH
5. Valve of the recirculation of exhaust gases (REG)
6. Vacuum tube of RVG
7. Bolts of "banjo", 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 muffler

14. 25 N. of m.
15. 30 N. of m.
16. Oxygen sensor, 50 N. of m.
cover a carving with structure of G5, 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 muffler


Vacuum connections (Coupet's model)
1. Return fuel-supply line
2. The giving fuel-supply line
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 the 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. Idling stabilization valve
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. Ventilation of a case
7. To the fuel tank
8. Fuel distributor
9. From the fuel filter
10. Inlet collector
11. Idling stabilization valve
12. Head of cylinders
13. Vacuum connection of the amplifier of the brake system
14a. A cap (cars with the forward drive without conditioner)
14b. Connections of the conditioner or blocking of differential
14 pages. Connections of blocking of differential (all-wheel drive cars with the conditioner)
14d. Connection of the conditioner (all-wheel drive cars with the conditioner)
15. Vacuum tank
16. RVG frequency valve (N 121)
17. Coal filter