Audi A4, S4

since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Governing bodies and receptions of safe operation
+ Current leaving and service
- Engine
   Removal and installation of the top cover of the engine / bottom protection of an impellent compartment/stretcher
   Compression check in engine cylinders, identification of leaks
   Engine check by means of the vacuum gage
   + 4-cylinder petrol engines
   + 6-and 8-cylinder petrol engines
   - 4-cylinder diesel engines
      General information
      Removal and installation of a gear belt, engines of 1.9 l (AVB, AWX, AVF)
      Natyazhitel of a belt with damping by 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 air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Natyazhitel of a belt with damping by a friction

Weakening of a gear belt


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



    Check, whether the tension roller by a lock finger of T 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 turn of a camshaft the stop of any piston in situation VMT is not allowed. Danger of damage of the valves/the bottom of pistons.

    Check the provision 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 as appropriate it is necessary to displace the holder.
    Once again check, whether VMT labels coincide.
    Unscrew bolts of fastening of a wheel of a camshaft so that the wheel could move in oblong openings.
    Establish a wheel in oblong openings in average situation.
    Put on a gear belt a camshaft wheel, a tension roller, a wheel of a cranked shaft and in the last turn on a wheel of the pump of cooling liquid.

Tension of a gear belt


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