Audi A4, S4

since 2000 release

Repair and operation of the car

Power supply systems, release and decrease in toxicity of the fulfilled gases

Specifications

Fuel

Petrol models

Unleaded gasoline is not worse than AI-95/A-85, perhaps temporary use of unleaded gasoline is not worse than AI-91/A-82.5. Thus engine capacity will decrease a little, at increase in fuel consumption

Do not apply additive to fuel. They can result in the increased wear or damage of the engine.

Diesel models

Summer and winter diesel fuel No. 2 or No. 1 on ASTM D975

Do not apply ship (Marine Diesel Fuel), diesel fuel boiler, etc.

When using diesel fuel with the content of sulfur over 0.5%, make replacement of motive oil each 7500 km.

Winter fuel, provides normal working capacity to -20 °C.

Thanks to preliminary heating of fuel at the included system of heating of the car, the car on winter diesel fuel can be operated, as a rule, without refusals at a temperature of external air up to -25 °C.

Do not add gasoline to diesel fuel.

In case of use of summer diesel fuel, and also at a temperature of external air below -15 °C it is necessary to add certain, depending on temperature of external air quantity of means for improvement of fluidity or kerosene to fuel.

Means for improvement of fluidity can be used also in combination with kerosene.

You can receive the certificate of funds for HUNDRED.

The additive share taking into account temperature of external air has to be minimum.

The kerosene share in mix has to make no more than 50%.

Add additive to diesel fuel before loss of property of fluidity of diesel fuel owing to release of paraffin. Faults owing to release of paraffin can be rectified only heating of all power supply system.

Carry out mixing of diesel fuel with kerosene only in a fuel tank. For this purpose in a tank at first fill in kerosene, and then add diesel fuel.

After that the engine has to work some time in order that mix was distributed on all power supply system.

System of injection of the petrol engine

Electronic microprocessor system of the distributed injection (direct injection on the AWA engine) with the thermometric measuring instrument of mass of the soaked-up air, an electronic accelerator. On the ALT engine - the inlet pipeline with changeable geometry

Engines 1.6, 2.0 of l (ALT) 14 - 17

Characteristic	Value
Type
Engine of 1.6 l	Simos
Engine of 1.8 l	ME 7.5
Engine of 2.0 l (AWA)	MED 7.1.1
Engine of 2.0 l (ALT)	ME 7.5
L engines 2.4, 3.0	ME 7.1.1
Idling turns, in the min.
Engine of 1.6 l	700 - 840
Engine of 1.8 l	740 – 860 (760 – 860 on models with the full drive)
Engine of 2.0 l (AWA)	640 - 800
Engine of 2.0 l (ALT)	700 - 960
L engines 2.4, 3.0	670 - 770
The maximum turns, in the min.
Engine of 1.6 l	6500 - 6800
L engines 1.8, 2.4, 3.0	6800
Engine of 2.0 l	6500
Pressure of fuel, atm
On turns h.kh.
L engines 1.6, 2.0	about 3.5
Engine of 1.8 l	about 4.0
L engines 2.4, 3.0	3.2 – 3.8
At shutdown of vacuum
Engines 1.6, 2.0l	about 4.0
L engines 2.4, 3.0	3.8 – 4.2
Residual, in 10 min. after switching off of the engine
On the heated-up engine
Engines 1.6, 1.8, 2.0l	not less than 2.5
L engines 2.4, 3.0	about 2.2
On the cold engine
L engines 2.4, 3.0	about 3.0
From the preliminary fuel pump (the engine of 2.0 l of AWA)	about 6
From the pump of a high pressure (the engine of 2.0 l of AWA)
On single turns	about 39
Maximum value	about 110
The volume of injection, ml for 30 sec.
Engines 1.6, 2.0 of l (ALT)	95±10
Engine of 1.8 l	135±10
L engines 2.4, 3.0	90 - 125
Resistance of windings of injectors, Ohm at +20 °C (on the heated-up engine increases by 4 – 6 Ohms)
Engine of 1.8 l	12 – 13
L engines 2.4, 3.0	13.5 – 15.5
Sequence of ignition
4-cylinder engines	1-3-4-2
6-cylinder engines	1-4-3-6-2-5

System of injection of the turbodiesel engine

Glow plugs

Idling turns, in the min.

Characteristic	Value
Adjustment of number of turns of idling within maintenance is not required.
AVB engine	865±75
AVF engine	875±75
AYM, AKE engines	790±50
The maximum turns without loading	5000±200
Operating procedure of cylinders
4-cylinder engines	1-3-4-2
6-cylinder engines	1-4-3-6-2-5

Pressure of pressurization of a turbocompressor, atm, at rpm

Characteristic	Value
AVB engine	1.9-2.1/3090
AVF engine	2.1-2.6/3000
AYM, AKE engines	1.9-2.1/3000

The content in the fulfilled gases

Value lambda 0.97 – 1.03

Characteristic	Value
Idling
Petrol CO 2 engines, %	14.5 – 16.0
Diesel CO 2 engines, %	9.8 – 10.8
Smoke of the diesel, no more	2.0 (58%)
O 2, %	0.1 – 0.5
WITH in an exhaust pipe, %	max. 0.5
NANOSECOND, ppm	100
The contents WITH on 2500 – 2800 rpm
WITH, %	0.3
Value lambda	0.97 – 1.03

Efforts of a tightening of threaded connections, Nanometer

The moments of a tightening of fixture are given also in the text of the Head and on some illyustratsiyakh*.

* The moments of a tightening highlighted in the text in bold type are subject to exact observance; the efforts which are not highlighted in bold type are given only approximately.

Characteristic	Value
The inlet pipeline to a head of cylinders
L engines 1.6, 2.0	20
L engines 1.8, 2.4, 3.0, 4.2	10
Diesel engines of 1.9 l	25
Diesel engines of 2.5 l	10
Final collector to a head of cylinders
Petrol engines	25
Diesel engines of 1.9 l	25
Diesel engines of 2.5 l	22
Reception pipe to a collector
L engines 1.6, 1.8, 2.0	40
L engines 2.4, 3.0	25
Diesel engines	21
The fuel distributive highway to the inlet pipeline	10
Nozzle clip
Diesel engines of 1.9 l	12nm+270 °
Diesel engines of 2.5 l	30
Cap nut of the pipeline of a nozzle	30
TNVD gear wheel
Diesel engines of 2.5 l	22
Sensor of provision of a cam-shaft
Engine of 1.6 l	13
Lambda probe
L engines 1.6, 1.8, 2.0, 3.0	50
Engines of 2.4 l	55
Detonation sensor
Petrol engines	20