Audi A4, S4

since 2000 release

Repair and operation of the car

Audi A4, S4
+ Introduction
+ Governing bodies and methods of safe operation
+ Current leaving and service
- Engine
   Removal and installation of the top cover of the engine / lower protection of a motive compartment / stretcher
   Check of a compression in engine cylinders, identification of leaks
   Check of the engine 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 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 the drive of auxiliary units
   + 6-cylinder diesel engines
   + engine Lubrication system
+ Cooling systems, 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 friction

Weakening of a gear belt


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



  1. Check, whether the tension roller by a lock finger of T 10115 is recorded and whether is recorded by a nut on the right emphasis.

Adjusting works with a gear belt need to be performed 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/bottom of pistons.

  1. Check the provision of a tension roller: The lock pad (an arrow on an accompanying illustration) has to enter a groove on a head of cylinders, and an opposite case it is appropriately necessary to displace the holder.
  1. Double-check, whether VMT tags coincide.
  1. Turn off bolts of fastening of a wheel of a camshaft so that the wheel could move in oblong openings.
  1. Establish a wheel in oblong openings in average situation.
  1. 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


  1. Take out a lock finger of T10115.
  1. Turn off a nut of fastening (1) tension roller.
  2. Turn the clown of a tension roller HAZET 2587-1 key in the direction of an hour hand so that the index (2) faced on the center a window of a basic plate.
  3. Holding a tension roller in this situation tighten a nut of fastening of a tension roller the moment 20nm + 45 °.
  4. Tighten bolts of fastening of a wheel of a camshaft the moment 25nm.