Audi A4, S4

Since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
- The engine
   Removal and installation of the top cover of the engine / the bottom protection of an impellent compartment/stretcher
   Compression check in engine cylinders, revealing of leaks
   Check of the engine by means of the vacuum gauge
   + 4-cylinder petrol engines
   + 6 and 8-cylinder petrol engines
   - 4-cylinder diesel engines
      The general data
      Removal and installation of a gear belt, engines of 1.9 l (AVB, AWX, AVF)
      Натяжитель a belt with демпфированием a friction
      Removal and installation of a head of cylinders, diesel engines of 1.9 l (AVB, AWX, AVF)
      Removal and installation of a belt of a drive of auxiliary units
   + 6-cylinder diesel engines
   + System of greasing of the engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

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Натяжитель a belt with демпфированием a friction

Easing of a gear belt


  1. Turn away a nut of fastening (1) tension rollers.
  1. Turn counter-clockwise the clown key HAZET 2587-1 so that the tension roller could be fixed lock finger Т 10115 or similar.
  1. Turn key HAZET 2587-1 clockwise against the stop and tighten by hand a nut (1).
  1. Remove a gear belt at first from the pump of a cooling liquid and then from other cogwheels.



  1. Check up, whether the tension roller by lock finger Т 10115 is fixed and whether is fixed by a nut on the right emphasis.

Adjusting works with a gear belt are necessary for making only on the cold engine. At camshaft turn the stop of any piston in position ВМТ is not supposed. Danger of damage of valves/bottoms of pistons.

  1. Check up position of a tension roller: the Lock pad (an arrow on an accompanying illustration) should enter into a groove on a head of cylinders, and an opposite case in appropriate way it is necessary to displace the holder.
  1. Once again check up, whether labels ВМТ coincide.
  1. Turn away bolts of fastening of a wheel of a camshaft so that the wheel could move in oblong apertures.
  1. Establish a wheel in oblong apertures in average position.
  1. Put on a gear belt a wheel of a camshaft, a tension roller, a wheel of a cranked shaft and in last turn on a wheel of the pump of a cooling liquid.

Tension of a gear belt


  1. Take out lock finger Т10115.
  1. Turn away a nut of fastening (1) tension rollers.
  2. Turn the clown of a tension roller key HAZET 2587-1 in an hour hand direction so that the index (2) stood on the centre before a window of a basic plate.
  3. Keeping a tension roller in this position tighten a nut of fastening of a tension roller the moment 20Нм + 45 .
  4. Tighten bolts of fastening of a wheel of a camshaft the moment 25Нм.