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
   Specifications
   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

Removal and installation of a belt of the drive of auxiliary units

Belt of the drive of auxiliary units. 4-cylinder diesel engine

1 — Krylchatka of the fan with the viscous coupling
2 — the Screw *, 10nm
3 — Klinova a belt
4 — the Screw *, 10nm + 90 °
5 — the Pulley of a cranked shaft (a damper of tortional fluctuations)
With — a rubber cover. Installation is possible only in one situation.
6 — the Screw, 25nm. At installation insert a sealing ring (12)
7 — the Screw, 25nm
8 — the Lever of a tension roller
9 — the Remote plug. Observe the provision of installation. Establish a sealing ring (12)
10 — the Tension roller
11 — the Bolt, 25nm
12 — the Sealing ring. In the presence of damages replace
13 — the Bolt *, 25nm
14 — the Generator
15 — the Tension element of a maple belt
16 — the Bolt, 25nm
17 — the Adjusting plug. Check correctness of installation in the holder

18 — the Holder. At installation watch that the right top plug rose between the holder and the block of cylinders
19 — the Bolt, 45nm. Observe sequence of an inhaling.
20 — the Bolt, 45nm
21 — the Bolt, 25nm
22 — the Support for the fan with the viscous coupling
23 — the Pressure head pipeline
24 — the Hollow bolt, 50nm
25 — Sealing rings *
26 — the Pump of the hydraulic booster
27 — the Bolt with a gear fillet *, 28nm
28 — the Holder of a tension element
29 — a power steering pump Pulley. For an otvorachivaniye it is necessary to hold a mandrel
30 — the Bolt, 25nm
31 — the Bolt, 25nm
32 — a fan Pulley with the viscous coupling
33 — the Viscous coupling
*) surely replace.

Order of a tightening of bolts of the holder

Bolts of the holder 18 are tightened in sequence with 1 on 6 in 2 receptions.

1 reception: Bolts with 1 on 6 - by hand.
2 reception: Bolts with (1) on (6) - the moment 45nm.

Removal

PERFORMANCE ORDER

Remove the lower cover of a motive compartment, address to the Section Removal and installation of the top cover of the engine / the lower protection of a motive compartment / stretcher.

Mark on a maple belt with chalk or a felt-tip pen the direction of its rotation.

Change of the direction of rotation of the belt which was in work can lead to its gap.

Turn out bolts of fastening of a tension roller of a maple belt of the compressor (an arrow on an accompanying illustration) and thus weaken a belt.

Take off maple a compressor belt.
Remove the top air duct in forward right part of a motive compartment, address to the Section Removal and installation of the top cover of the engine / the lower protection of a motive compartment / stretcher.

Incline the device of a tension of a maple belt in the direction of an arrow on an accompanying illustration and thus weaken a belt.

Take off maple a belt and unload the tension device.

Installation

PERFORMANCE ORDER

Put on maple a belt (And) pulleys of a cranked shaft (1), the pump of the hydraulic booster (2), a tension roller (3) and the fan with the viscous coupling (4).
Incline the device of a tension of a maple belt in the direction of an arrow.
In the last turn put on maple a belt a pulley of the generator (5) and unload the tension device. Put on maple a belt (In) a pulley of a cranked shaft (1), the compressor (6) and the device of a tension (7).
Establish a dinamometrichesky key (C), as shown in an accompanying illustration, on a hexagon of a tension roller (1) and tighten a tension roller the moment 30nm.
In this situation tighten screws (2) the moment 20nm. Start the engine and check visually work of a belt. Thus pay attention to the correct provision of a belt on pulleys.