AUDI AKC — 3.7L Engine
3.7L · 260 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | AKC |
| Capacity | 3697 cc |
| Idle speed | 600 - 720 rpm |
| Oil pressure | 1.0 - 2.5 bar/rpm |
| Oil pressure | 3-5 / 3000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Bosch Motronic |
| Number of cylinders | 8 |
| Firing order | 1-5-4-8-6-3-7-2 |
| Spark plugs (make and type) | VW/Audi 101 000 054 AC Bosch FGR7KQE |
| Spark plug gap | 0.9 - 1.1 mm |
| Injection pressure/system pressure | 3.5 4.0 bar |
| Injector resistance | 13 - 16 ohms |
| Oil temperature during test | 80 °C |
| Fast-idle speed | 2500 - 3200 rpm |
| Lambda | 0.970 - 1.030 |
| Lambda change (Delta Lambda) | 0.03 |
| CO at fast-idle speed | < 0.3 % |
| Closed-loop test at: | 600 - 720 rpm |
| Conditioning catalytic converter | 2 / 2500 min/rpm |
| CO exhaust gas | < 0.5 % |
Cooling system
| Cap pressure | 1.2 - 1.5 bar |
| Thermostat opens at | 87 - 102 °C |
Electrical
| Battery | 100 Ah |
| Alternator | 150 A |
Brakes
| Disc thickness (ventilated), front | FN3: 25.0 HP2, FN2, Brembo: 30.0 mm |
| Disc thickness (ventilated), front, min. | FN3: 23.0 HP2, FN2, Brembo: 28.0 mm |
| Disc thickness, rear | C38: 10.0 C43: 20.0 mm |
| Disc thickness, rear, min. | C38: 8.0 C43: 18.0 mm |
Steering and wheel alignment
| Toe-in, front | 0°10' ± 02' ° |
| Camber, front | 1BA, 1BM, 1BG, 1BN: -0°50' ± 30' ° |
| Camber, front | 1BE, 1BD: -0°65' ± 30' ° |
| Camber, front | 1BT: -0°45' ± 30' ° |
| Max. difference left side - right side | 30' ° |
| Toe-in, rear | 0°06' ± 05' ° |
| Camber, rear | 0°40' ± 30' ° |
Capacities
| Engine sump, incl. filter | 7.2 l |
| Automatic transmission | 01V |
| Gearbox refill | 2.6 l |
| Differential | 0.8 l |
| Transfer box | 0.8 l |
| Differential, 4WD rear | 1.5 l |
| Cooling system | 9.0 l |
| Air-conditioner refrigerant | 800 - 850 g |
| Air-conditioner compressor oil | 250 - 300 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 35 Nm |
| Cylinder head bolts — Stage 2 | 60 Nm |
| Cylinder head bolts — Stage 3 | 90 ° |
| Cylinder head bolts — Stage 4 | 90 ° |
| Spark plugs | 30 Nm |
| Wheel nuts | 120 Nm |
| Front hub | 190 Nm + 180° |
| Rear hub | 190 Nm + 180° |
| Crankshaft gearwheel | 200 Nm + 180° Nm |
Emissions
| Emission code | 70/220*1996/69 |
| Emission standard | Euro 2 (12/1998 ->) |
| CO2 average | 278 g/km |
| CO | 0.254 g/km |
| HC NOx | 0.137 g/km |
| Emission code | 70/220*1999/102 |
| Emission standard | Euro 3 (04/2000 ->) |
| CO | 0.676 g/km |
| HC | 0.067 g/km |
| NOx | 0.024 g/km |
| Emission code | 70/220*1999/102B |
| Emission standard | Euro 4 (12/2000 ->) |
| CO2 average | 295 - 298 g/km |
| CO | 0.753 g/km |
| HC NOx | 0.220 g/km |
| CO | 0.665 g/km |
| HC | 0.070 g/km |
| NOx | 0.018 g/km |
| CO2 average | 298 g/km |
Engine codes in the same family
The same code prefix usually means the same block with a different output, fuel or model year. Procedures are often shared — check the code on the engine plate.
Workshop procedures for this engine
Step-by-step procedures from the workshop database, carrying 233 torque figures.
- Removing and installing toothed belt · 56 torque figures
- Removing and installing sump (top section) · 25 torque figures
- Stress-free alignment of exhaust system · 54 torque figures
- Installing cylinder head · 14 torque figures
- Removing and installing drive plate · 17 torque figures
- Removing and installing poly V-belt · 11 torque figures
- Draining and filling cooling system · 6 torque figures
- Separating engine and gearbox · 7 torque figures
- Removing and installing sump (bottom section) · 5 torque figures
- Removing and installing coolant pump · 6 torque figures
- Removing, installing and checking thermostat · 4 torque figures
- Removing and installing oil pump · 5 torque figures
- Removing toothed belt from camshaft sprockets · 2 torque figures
- Removing and installing sealing flange (front) · 1 torque figures
- Checking radial clearance of conrod bearings · 6 torque figures
- Removing and installing cylinder head cover (right-side) · 2 torque figures
- Removing and installing vibration damper · 3 torque figures
- Renewing camshaft oil seals · 2 torque figures
- Removing and installing exhaust manifold
- Removing and installing radiator · 1 torque figures
- Measuring radial clearance · 5 torque figures
- Removing cylinder head (left-side)
- Renewing valve stem oil seals
- Removing and installing camshafts and camshaft adjuster - cylinder head (left-side)
- Removing and installing cylinder head cover (left-side) · 1 torque figures
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TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.