Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car



Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
- Suspension bracket and steering
   Control of a condition of a casing of the steering mechanism
   Check of dustproof covers and side play of tips of cross steering drafts
   Check of dustproof covers of hinges of a forward suspension bracket
   Check of a side play of steering
   Check of a maple or poliklinovy belt
   Check of level of working liquid
   Check of a side play of the wheel bearing
   Shock-absorbers
   List of malfunctions
   Adjustment of angles of installation of wheels
   Measurement of adjustment of angles of installation of wheels
   List of malfunctions
   Repair of a running gear and steering
   Repair of a forward suspension bracket
   Repair of a back suspension bracket
   Steering
   Steering repair
   List of malfunctions
   Adjustment of the steering mechanism
   Filling with liquid and pumping of a hydraulic system of the power steering
   Safety cushion
   Requirements of safety measures
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signaling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications





Repair of a back suspension bracket

Sleva: elements of a back suspension bracket of wheels at front-wheel models:

1 – shock-absorber;
2 – buffer;
3 – protective cap;
4 – bearing ring;
5 – rubber support;
6 – case of a depreciation rack;
7 – overlay of a spring;
8 – spring.

On the right: at all-wheel drive models the back suspension bracket of wheels consists from:

1 – shock-absorber;
2 – springs;
3 – cases of a depreciation rack;
4 – top cross lever of a suspension bracket;
5 – cases of the wheel bearing (rotary fist).

Back suspension bracket of wheels at all-wheel drive models

1 – case of the wheel bearing (rotary fist);
2 – top cross lever of a suspension bracket;

3 – case of a depreciation rack;
4 – lower cross lever.


Shooters designated four fixing bolts of a depreciation rack (also at all-wheel drive models).

Removal of a back depreciation rack

Front-wheel models

 PERFORMANCE ORDER

  1. To raise the car on both sides.
  2. To provide fixing of the car.
  3. To remove a wheel.
  4. To bring a support under an axis from that party with which the depreciation rack will be removed, and at the same time to raise an axis approximately on 10 mm.
  5. To weaken the lower fixing bolt on a depreciation rack.
  6. To weaken four top fixing bolts on a depreciation rack. At the same time to hold a rack.
  7. To remove a depreciation rack.
  8. At installation at first to tighten the top bolts of a depreciation rack (55 N • м).
  9. It is free to put the lower fastening of a depreciation rack, at the same time to replace самоконтрящуюся a nut.
  10. To lower the car on the earth all four wheels.
  11. Only now to tighten the lower fixing bolt of a depreciation rack the moment of 240 N • m. Otherwise rubber-metal plugs can warp.

Removal of a back depreciation rack

All-wheel drive models

 PERFORMANCE ORDER

  1. To raise the car.
  2. To provide fixing of the raised car.
  3. To remove a wheel.
  4. To bring a support under the cross lever of a suspension bracket from that party with which the depreciation rack will be removed.
  5. To unscrew the lower fixing bolt on a depreciation rack.
  6. To weaken four top fixing bolts on a depreciation rack. At the same time to hold a rack in order that all suspension bracket of the back bridge did not hit against a wing from within.
  7. To weaken and remove a fixing bolt of the cross lever of a suspension bracket at the top of a depreciation rack.
  8. To remove a depreciation rack.
  9. At installation it is free to put the lower fastening of a depreciation rack, at the same time to replace самоконтрящуюся a nut and bolts.
  10. To tighten the top bolts of a depreciation rack (55 N • м).
  11. It is free to screw a fixing bolt of the top cross lever of a suspension bracket, here too to replace bolts and самоконтрящиеся nuts.
  12. To lower the car on the earth all four wheels. If to tighten bolts of a suspension bracket of wheels on the raised car, then rubber-metal plugs will warp.
  13. Only now to tighten the lower fixing nut of a depreciation rack the moment of 90 N • m and to turn in conclusion on 1/2 turns (90 °).
  14. To tighten a nut of a fixing bolt of the top cross lever of a suspension bracket the moment of 70 N • m and to turn in conclusion on 1/2 turns (180 °).

Removal of back shock-absorbers

Front-wheel models

Before replacement of shock-absorbers it is necessary to establish what running gear is established on your car. Only in this case you will be able to order the necessary shock-absorbers. It can be recognized by the carrier of parameters of the car – the plate pasted in a niche of a spare wheel under a rug. Marking means:

  • 1BA – serial execution
  • 1BE – sports option
  • 1BB – execution for bad roads

Now it is possible to begin:

 PERFORMANCE ORDER

  1. To remove a depreciation rack.
  2. To establish a natyazhitel of springs on rounds of springs and to squeeze a little a spring.
  3. In order that natyazhitel of springs did not come off, it is necessary to paste over the corresponding rounds of springs with a kleyushchy tape.
  4. To remove the top rubber support of a depreciation rack.
  5. To weaken top самоконтрящуюся a nut on a shock-absorber rod. At the same time to hold it with a key with an internal hexagon.
  6. To hold the shock-absorber and to remove it after removal of a nut.
  7. To remove springs and other details from the shock-absorber.
  8. At assembly to pay attention:
  • The lower end of a spring at the correct installation is directed on the left side of the car back, and on right forward.
  • Color marking on a spring specifies the direction down to a plate of a spring.
  • The fastening opening below on the shock-absorber shows perpendicularly to the direction of the movement.
  1. Assembly of elements has to be made in the order specified in the drawing below.
  2. Installation of a depreciation rack is described in the previous section.

Removal of the back shock-absorber

All-wheel drive models

At all-wheel drive cars (Audi 80 quattro) the shock-absorber separates from the removed depreciation rack by means of a natyazhitel of springs. It is easy to execute it.

It becomes heavier at installation: the angle of the lower fastening of the shock-absorber to the top fastening of the shock-absorber has to make in the established state precisely 21 ± 2 °. Without adjusting template V. A. G. 1752 which the workshop Audi uses it is so precisely almost impossible to establish. Our council to those who do not want to transfer all work to a workshop: it is possible just to remove a depreciation rack, to ask a workshop to install precisely the shock-absorber, and then to establish houses a depreciation rack again.

Regulation of bearings of naves of back wheels

Front-wheel models

 PERFORMANCE ORDER

  1. To raise a back part of the car and to fix it.
  2. To take off a wheel cap, the forelock and a koronchaty cap on the way described in the head the Brake system.
  3. Models with back drum brake mechanisms: to wring out up an adjusting wedge in the way, described in the above-stated section. Then the brake drum will be rotated absolutely freely.
  4. Without excessive efforts to tighten a six-sided nut, rotating at the same time a wheel in order that did not clamp bearings.
  5. Again slightly to weaken a nut.
  6. The side play is established correctly if easy pressing of the screw-driver it is possible to shift slightly a persistent washer behind a nut. The screw-driver edge at the same time cannot be opirat about edge of a nave of a wheel.

Wheel bearings of all-wheel drive models

At correctly established hug bearing side play easy pressing of the screw-driver it is possible to shift slightly a persistent washer (1) under an adjusting nut (2). At the same time the edge of the screw-driver should not lean on the brake drum or a brake disk.

  • If now still it is impossible to insert the lock forelock into a lock clamp, then, so it is necessary to turn a nut a little in the close direction.
  • To put on a wheel cap, podstukivy the rubber hammer, if necessary to enclose a hard parcel of rags.

All-wheel drive models and on a back axis have pressed double ball-bearings. Though they also do not need to be regulated, but due to the lack of compression molds they cannot be changed independently.








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