Warning: Individual characteristics are also given in the text of the Chapter and, if their implementation is mandatory, are highlighted in bold
Petrol engines | |
| All models except those equipped with 132 kW engines (AJQ):
Unleaded gasoline is not worse than AI-95 It is permissible to use unleaded gasoline no worse than AI-91, while engine power decreases. Models with 132 kW engines (AJQ): Unleaded petrol is no worse AI-98. It is permissible to use unleaded gasoline no worse than AI-95, at this reduces engine power. | |
| Diesel engines | |
| Diesel fuel | |
| according to DIN EN1) 590 | Cetane number not less than 49 |
| Biodiesel fuel | |
| according to E DIN 51 606 | RME (vegetable oil methyl ester) |
| Contains almost no sulfur. Therefore, when burning, PME are almost absent
release of sulfur dioxide (S02). Exhaust gases contain less: - carbon monoxide, - hydrocarbon, - soot. Minor power loss and fuel consumption increases may occur fuel. In cold weather, mainly fill up with diesel fuel. Allowed use of RME at temperatures down to –10°C. At temperatures below –10°C, diesel fuel should be added in a ratio of 1: 1, to prevent RME fuel from clumping. In winter conditions When using summer diesel fuel at temperatures below 0°C may cause engine malfunctions due to thickening fuel as a result of paraffin release. Therefore, use "winter" diesel fuel. Depending on the brand, winter fuel ensures uninterrupted operation at temperatures from –15°C to –22°C. Do not add gasoline to diesel fuel or similar thinners. In case of low fuel quality, remove water from the fuel filter sump may need to be produced more frequently than scheduled THAT. To remove water, unscrew the threaded plug at the bottom of the filter by hand. Water accumulation in the filter can cause engine malfunction. | |
| Fuel tank | |
| Volume 55 l or 62 l on models with all-wheel drive including reserve stock | 8 l |
| Petrol engine injection system | |
| 1.6 AEH | Simos 2.1/Simos 2.2 |
| 1.8 AGN | Motronic 3.8.5 |
| 1.8 AQA | Motronic ME7.5 |
| 1.8T AGU | Motronic 3.8.3 |
| Diesel engine injection system | Electronic with direct injection, turbocharging and charge air cooling air |
| Idle speed, rpm | |
| AEH | 760 – 880 |
| AGN | 760 – 840 |
| AGU, AQA | 800 – 920 |
| AJQ, APY | |
| 1.9 TDI | 875 – 950 |
| Exhaust gas content at idle speed | |
| CO, % | max 0.5 |
| NS, ppm | 100 |
| CO₂, % | 14.5 – 16.0 |
| CO₂, % | 0.1 – 0.5 |
| CO content at 2500 – 2800 rpm, % | 0.3 |
| The meaning of lambda | 0.97 – 1.03 |
| Maximum revolutions, rpm | |
| AEH | 6350 |
| AQA, AGN, AGU | 6800 |
| Other petrol engines | 6500 |
| TDI (AGR, ALH) | 4900 – 5100 |
| TDI (AHF) | 4800 – 5200 |
| Adjusting the idle speed and the maximum speed no maintenance revolutions are required. | |
| Fuel pressure regulator | |
| Fuel pressure, bar at idle speed and | |
| with a vacuum hose attached | 2.5 |
| removed vacuum hose | 3.0 |
| 10 min after stopping (at 20°C) | 2.0 |
| Injectors | |
| Injection volume for 30 sec, ml | |
| AGN | 85 – 105 |
| AGU | 110 – 130 |
| AQA | 133 – 157 |
| Injector resistance (at 20°C), Ohm | |
| AGN, AGU | 12 – 15 |
| AQA | 12 – 17 |
| AEH | 14 – 17 |
| Coolant temperature sensor resistance, Ohm/°C | 275 – 375 / 80 |
| Speed/TDC sensor resistance, Ohm | 450 – 1000 |
| Lambda probe heater resistance, Ohm | 1 – 5 |
| Nozzles | |
| Fuel injection pressure | |
| New injectors, bar | 190 – 200 |
| Wear limit, bar | 170 |
| Resistance | |
| Engine speed sensor between contacts 1 and 2, kOhm | 1.0 – 1.5 |
| Brake/stop light pedal switch or clutch pedal switch, Ohm | |
| The pedal is pressed | open |
| The pedal is not pressed for less than | 10 |
| Needle displacement sensor (at the injector of the 3rd cylinder), Ohm | 80 – 120 |
| Diesel Engine Turbocharger Boost Pressure | |
| Models produced up to 02.94 | |
| When driving in 3rd gear at a speed of 40 km/h, completely press the gas. When the speed reaches 80 km/h the pressure should be | 1.50 – 1.65, bar |
| Models produced since 03.94 | |
| Disconnect the pressure control solenoid valve. While driving in 3rd gear with 1500 rpm, fully depress the gas. Upon reaching 3000 rpm the pressure should be | 1.55 – 1.75, bar |
| Tightening forces of threaded connections | |
| The tightening torques for fasteners are also given in the text of the Chapter and on
some illustrations*. *Tightening torques highlighted in bold in the text are subject to precise compliance; efforts not in bold are only approximate | |
| Hall sensor on the cylinder head | 10 Nm |
| Intake manifold to cylinder head | |
| Petrol engines | 10 Nm |
| Diesel engines | 25 Nm |
| Exhaust manifold on the cylinder head | 25 Nm |
| Clamp connections | 40 Nm |
| Oxygen sensor to catalytic converter | 50 Nm |
| Other bolted/flanged connections | 25 Nm |
| Intake pipe to exhaust manifold/turbocharger (petrol) | 40 Nm |
| Intake pipe to exhaust manifold/turbocharger (diesel) | 25 Nm |
[This article was previously published on the resource AUDIMANUAL.ru]