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
   Removal of a replaceable element of the air filter
   Purge of a replaceable element of the air filter
   Replacement of a replaceable element of the air filter
   Heating of inlet air
   Heating of an inlet collector
   Inlet collector with a changeable length of a path
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ 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





Removal of a replaceable element of the air filter

Models with the 4-cylinder engine and system of injection Mono-Motronic

 PERFORMANCE ORDER

  1. To unscrew two screws with crosswise shliyets located above on a cover of the air filter.
  2. To open tightening brackets around the filter case.
  3. To uncover, take out a replaceable element of the filter.
  4. At installation to watch the correct position of the case of the filter and a cover: dredging on the edge of a cover belongs to a ledge on the case.

Models with the 4-cylinder engine and system of injection Digifant

 PERFORMANCE ORDER

  1. To weaken a bandage on an air inlet sleeve. To remove a sleeve.
  2. To open tightening brackets around the filter case.
  3. To uncover, take out a replaceable element of the filter.
  4. Vacuum hoses can remain connected.

Models with the 5-cylinder engine

 PERFORMANCE ORDER

  1. To weaken the fixing air inlet sleeve earring on a headlight cap; to remove a sleeve.
  2. To press two fixing latches of a cap of a headlight down and to take off it up.
  3. To remove the right part of a cap of a headlight after weakening of two screws with crosswise shliyets.
  4. To remove an inlet cap over the proofreader of composition of gas mixture.
  5. To remove in total five fixing brackets around the case of the air filter.
  6. To extend up the proofreader of composition of gas mixture together with the top part of the case of the air filter. Now it is possible to take out a replaceable element.

Models with the 6-cylinder engine

 PERFORMANCE ORDER

  1. At the 2,8-liter engine to remove air flowmeter plugs.
  2. To remove a bandage on an air inlet sleeve. To remove a sleeve.
  3. To open tightening brackets around the filter case.
  4. To uncover, take out a replaceable element of the filter.

Removal of the case of the air filter

After removal of tightening brackets and both screws (1) it is possible to separate the top part of the case of the filter from the lower part (3) and to take out a replaceable element (2). At installation it is necessary to monitor the correct provision of parts of the case on the relation to each other. The ledge on the lower part of the case has to enter dredging on the top part.

Replacement of the air filter on the example of the 85 kW 4-cylinder engine is shown: after removal of tightening brackets (arrow) it is possible to remove the top part of the case (2). In addition here also the air inlet sleeve is established. Now the replaceable element of the air filter becomes available.


 PERFORMANCE ORDER

  1. The engine with system of injection Mono-Motronic: to remove a replaceable element of the air filter (see above).
  2. To unscrew three nuts in the middle of the case and where is available, to take out a fixing ring.
  3. To remove all sleeves, to take out valves and a fuel-supply line.
  4. To remove the case.
  5. At installation to pay attention: the vacuum sleeve to the valve of the warmed-up air in a branch pipe of the inlet gas pipeline approaches a hose tip from brass or a tip with a tag. And the sleeve to the block of preparation of gas mixture approaches a plastic branch pipe without tag.
  6. Models with 4-cylinder engines and system of injection Digifant, and also model with 5-and 6-cylinder engines: to uncover the case (with the proofreader of composition of gas mixture) and a replaceable element of the air filter.
  7. To disconnect a sleeve of the warmed-up air of system of heating of inlet air.
  8. To turn off a six-sided bolt at the capacity basis.
  9. To take out a fixing pin of the case of the filter from the rubber plug on a wheel niche.
  10. To remove the case.







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