Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2020 Audi S8FACTORY OEM SERVICE PROCEDURE
Specifications Index
SPECIFICATIONS INDEX
| System | Specification/Procedure | ||
|---|---|---|---|
| Air Conditioning | |||
| Service | PHYSICAL PRINCIPLES | ||
| Torque | SYSTEM OVERVIEW - REFRIGERANT CIRCUIT / OVERVIEW - HEAT PUMP VALVE UNIT / OVERVIEW - A/C COMPRESSOR POWER UNIT | ||
| Axle Nut/Hub Nut | |||
| Front | 200 Nm +180° | ||
| Rear | 200 Nm +180° | ||
| Battery | COLD CRANK AMPS TABLE | ||
| Brakes | |||
| Bleeding Sequence | HYDRAULIC SYSTEM, BLEEDING | ||
| Disc Brakes | TECHNICAL DATA, BRAKES | ||
| Torque | OVERVIEW - FRONT BRAKES
/ OVERVIEW - REAR BRAKES Mechanical Components OVERVIEW - FRONT BRAKE CALIPER / OVERVIEW - REAR BRAKE CALIPER / OVERVIEW - BRAKE BOOSTER/BRAKE MASTER CYLINDER / OVERVIEW - VACUUM PUMP Hydraulic Components |
||
| Charging | |||
| Generator | GENERATOR | ||
| Torque | |||
| Drive Belts | |||
| Adjustment | |||
| 3.0L | RIBBED BELT, REMOVING AND INSTALLING | ||
| 4.0L | RIBBED BELT, REMOVING AND INSTALLING (CXYA, CWWB, DJPB, DCUE, DHUB) / RIBBED BELT, REMOVING AND INSTALLING (CXYA, CWWB) | ||
| 3.0L | RIBBED BELT, REMOVING AND INSTALLING | ||
| 4.0L | INSTALLING (STARTER GENERATOR RIBBED BELT) / INSTALLING (GENERATOR C) / INSTALLING (A/C COMPRESSOR) | ||
| Engine Cooling | |||
| General Service Specifications | Refer to the approrpiate FLUID CAPACITY TABLES information. | ||
| Radiator Cap Pressure | 1.4 to 1.6 bar (20.30 to 23.20 psi) | ||
| Thermostat R & I | |||
| 3.0L | MAP CONTROLLED ENGINE COOLING THERMOSTAT -F265-, REMOVING AND INSTALLING | ||
| 4.0L | MAP CONTROLLED ENGINE COOLING THERMOSTAT -F265-, REMOVING AND INSTALLING | ||
| Water Pump R & I | |||
| 3.0L | COOLANT PUMP, REMOVING AND INSTALLING | ||
| 4.0L | COOLANT PUMP, REMOVING AND INSTALLING | ||
| Engine Mechanical | |||
| 3.0L | |||
| Compression | COMPRESSION, CHECKING | ||
| Oil Pressure | Oil pressure at 2, 000 RPM: minimum 1.5 bar (21.7 psi). Oil pressure when the vehicle is idling is minimum 1.2 bar (17.4). |
||
| Engine Oil Drain Plug | 30Nm | ||
| Overhaul | 10 ENGINE ASSEMBLY | ||
| Torque | |||
| 4.0L | |||
| Compression | COMPRESSION, CHECKING (CXYA, CWWB, DJPB, DCUE, DHUB) / COOLANT PUMP, REMOVING AND INSTALLING (CXYA, CWWB) | ||
| Oil Pressure | Oil pressure at idle: minimum 1.3 ± 0.3 bar (18.9 ± 4.4 PSI) Oil pressure at 2, 000 RPM: minimum 1.6 to 2.2 bar (23.2 to 31.9 PSI) |
||
| Engine Oil Drain Plug | 30Nm | ||
| Overhaul | 10 ENGINE ASSEMBLY | ||
| Torque | ENGINE, INSTALLING | ||
| 3.0L | The fuel injection system is separated into a high-pressure section (maximum approximately 120 bar) and a low-pressure section (approximately 7 bar). | ||
| 4.0L | The fuel injection system is separated into a high-pressure section (maximum approximately 140 bar) and a low-pressure section (4 to 7 bar). | ||
| 3.0L | FUEL PRESSURE SENSOR - G247-, CHECKING | ||
| 4.0L | FUEL PRESSURE SENSOR - G247-, CHECKING | ||
| Ignition | |||
| Firing Order & Cylinder Identification | FIRING ORDER & CYLINDER IDENTIFICATION | ||
| Ignition Wires (Resistance) | Coil-On-Plug | ||
| Ignition Wires (Routing) | Coil-On-Plug | ||
| Spark Plug | |||
| 3.0L | OVERVIEW - IGNITION SYSTEM | ||
| 4.0L | OVERVIEW - IGNITION SYSTEM | ||
| Starting | |||
| Starter | N/A | ||
| Torque | N/A | ||
| Wheel Alignment | |||
| Adjustment Specifications | Refer to the appropriate service information | ||
| Torque | OVERVIEW - FRONT AXLE
/ OVERVIEW - SUBFRAME
/ OVERVIEW - STABILIZER BAR
/ OVERVIEW - SUSPENSION STRUT AND UPPER CONTROL ARM
/ OVERVIEW - LOWER CONTROL ARM AND BALL JOINT
/ OVERVIEW - WHEEL BEARING
/ OVERVIEW - DRIVE AXLE Front Suspension OVERVIEW - REAR AXLE / OVERVIEW - SUBFRAME / OVERVIEW - STABILIZER BAR / OVERVIEW - TRANSVERSE LINK / OVERVIEW - SUSPENSION STRUT, SHOCK ABSORBER, SPRING / OVERVIEW - WHEEL BEARING / OVERVIEW - DRIVE AXLE Rear Suspension |
||
| Wheel & Tire | |||
| Wheel Lug Nut Torque | 140 Nm | ||
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.