AUDI ARN — 2.4L Engine
2.4L · 136 hp
Engine overview
Manufacturer
AUDI
Displacement
2.4 L
Power
136 hp
Production years
1999-2002
Fuel type
Petrol
Vehicles with this engine
4B
Torque figures by job
From the step-by-step procedures for this engine — each figure sits in the step that uses it.
Removing and installing sump (top section)
- 5 Nm (3.7 lb-ft) — Fit top section of sump in position (2nd mechanic required) and pre-tighten bolts (1) and…
Draining and filling cooling system
- 20 Nm (15 lb-ft) — Renew O-ring and tighten drain plug (arrow) to
- 15 Nm (11 lb-ft) — Renew seal and tighten bleed screw (arrow) to
Removing and installing toothed belt
- 15 Nm (11 lb-ft) — Apply torque wrench at hexagon socket of tensioning roller and tension belt with a torque…
- 30 Nm (22 lb-ft) — Tighten camshaft sprockets to
Removing and installing sealing flange (front)
- 10 Nm (7.4 lb-ft) — Tighten bolts (1) to
Removing, installing and checking thermostat
- 15 Nm (11 lb-ft) — Pre-tension tensioning roller by applying a torque of
Installing cylinder head
- 60 Nm (44 lb-ft) — Tighten with torque wrench to
Removing and installing drive plate - vehicles with automatic gearbox 01V
- 30 Nm (22 lb-ft) — Insert at least 3 old securing bolts and tighten to
- 30 Nm (22 lb-ft) — Remove drive plate again and install with different shim (1)
Stress-free alignment of exhaust system
- 40 Nm (30 lb-ft) — Tighten bolts on clamps evenly to
- 40 Nm (30 lb-ft) — Tighten bolts on front clamps evenly to
- 40 Nm (30 lb-ft) — Tighten bolts on rear clamp(s) evenly to
Checking radial clearance of conrods
- 30 Nm (22 lb-ft) — Fit conrod bearing cap and tighten to
Crankshaft - exploded view of components
- 60 Nm (44 lb-ft) — Tighten bolts (1
- 25 Nm (18 lb-ft) — Tighten bolts (A) to
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | ARN |
| Capacity | 2393 cc |
| Idle speed | 670 - 770 rpm |
| Normal | 9.0 - 14.0 bar |
| Minimum | 7.5 bar |
| Differential limit between cylinders | 3.0 bar |
| Oil pressure | 2.0 / 2000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Bosch Motronic ME 7.1 |
| Number of cylinders | 6 |
| Firing order | 1 - 4 - 3 - 6 - 2 - 5 |
| Injector resistance | 13.5 - 15.5 ohms |
| Ignition coil resistance, secondary | 8000 - 14000 ohms |
| Spark plugs (make and type) | NGK BKR6EKUB Bosch F7 LTCR |
| Spark plug gap | 0.7 - 0.9 mm |
| Spark plug cable resistances | 16 - 27 kohms |
| Injection pressure/system pressure | 3.2 - 3.8 3.8 - 4.2 bar |
| CO exhaust gas | < 0.5 % |
| CO2 | > 13.0 % |
| HC | < 100 ppm |
| O2 | 0.1 - 0.5 % |
| Lambda | 0.97 - 1.03 |
| Lambda change (Delta Lambda) | 0.03 |
| Oil temperature during test | 80 °C |
Cooling system
| Cap pressure | 1.4 - 1.6 bar |
| Thermostat opens at | 86 °C |
| Stage 1/Fan 1 | 92 -97 °C |
| Stage 2/Fan 2 | 99 - 105 °C |
Electrical
| Battery | 66 / 74 Ah |
| Alternator | 90 / 120 A |
Capacities
| Engine sump, incl. filter | 6.0 l |
| Manual transmission | 012 / 01W |
| Gearbox refill | 2.25 l |
| Manual transmission | 01A |
| Gearbox refill | 2.7 l |
| Automatic transmission | 01V |
| Gearbox refill | 2.6 - 3.0 l |
| Differential | 0.8 l |
| Differential, 4WD rear | 1.9 l |
| Transfer box | 0.8 l |
| Cooling system | 8.0 l |
| Air-conditioner refrigerant | 750 - 800 (08/1998 - 04/1999) g |
| Air-conditioner refrigerant | 650 - 700 (> 04/1999) g |
| Air-conditioner compressor oil | 250 - 300 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 60 Nm |
| Cylinder head bolts — Stage 2 | 180 ° |
| Oxygen sensor | 55 Nm |
| Exhaust manifold | 25 Nm |
| Inlet manifold | 10 Nm |
| Oil plug | 30 Nm |
| Flywheel | 60 Nm + 90° 60 Nm + 180° Nm |
| Knock sensor | 20 Nm |
| Big-end bearing cap | 30 Nm + 90° Nm |
| Big-end bearing cap | M8: 30 Nm + 90° M8.5: 40 Nm + 90° Nm |
| Spark plugs | 30 Nm |
| Front hub | M14: 115 Nm + 180° M16: 190 Nm + 180° |
| Rear hub | M14: 115 Nm + 180° M16: 190 Nm + 180° |
| Wheel bolts | 120 Nm |
| Crankshaft gearwheel | 200 Nm + 180° Nm |
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 160 torque figures.
- Removing engine · 41 torque figures
- Installing engine · 36 torque figures
- Removing and installing sump (top section) · 25 torque figures
- Installing cylinder head · 14 torque figures
- Measuring radial clearance of crankshaft · 11 torque figures
- Crankshaft - exploded view of components · 8 torque figures
- Removing, installing and checking thermostat · 4 torque figures
- Removing and installing camshafts and camshaft adjuster · 4 torque figures
- Removing and installing sealing flange (front) · 1 torque figures
- Removing and installing cylinder head cover (right-side) · 2 torque figures
- Removing and installing drive plate - vehicles with automatic gearbox 01V · 5 torque figures
- Renewing camshaft oil seals · 2 torque figures
- Removing and installing intake manifold
- Removing cylinder head (left-side)
- Checking radial clearance of conrods · 4 torque figures
- Removing and installing continued coolant circulation pump V51
- Checking secondary air pump relay J299 and activation
- Removing and installing cylinder head cover (left-side) · 1 torque figures
- Removing cylinder head (right-side)
- Checking oil pressure and oil pressure switch
- Checking camshaft control valves (solenoid valves)
- Removing and installing coolant pipe (rear)
- Removing and installing coolant pipe (front)
- Checking secondary air inlet valve N112
- Installing sump (bottom section) - engines with liquid gasket · 2 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.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.