AUDI BNK — 4.2L Engine
4.2L · 334 hp
Engine overview
Vehicles with this engine
Torque figures by job
From the step-by-step procedures for this engine — each figure sits in the step that uses it.
- 20 Nm (15 lb-ft) — Screw locking pin3242 into bore
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (1) at exhaust camshaft on cylinder head (left-side)
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (2) at inlet camshaft
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (1) at inlet camshaft
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (2) at exhaust camshaft on cylinder head (right-side)
- 100 Nm (74 lb-ft) + 90° — Tighten camshaft bolt (1) at exhaust camshaft on cylinder head (left-side) to final torque
- 20 Nm (15 lb-ft) — Tighten base plates for support elements to
- 20 Nm (15 lb-ft) — Screw locking pin3242 into bore (
- 20 Nm (15 lb-ft) — Screw locking pin3242 into bore
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (1) at exhaust camshaft on cylinder head (left-side)
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (2) at inlet camshaft
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (1) at inlet camshaft
- 40 Nm (30 lb-ft) — Pre-tighten camshaft bolt (2) at exhaust camshaft on cylinder head (right-side)
- 5 Nm (3.7 lb-ft) — Fit sump (top section) with help of another mechanic and tighten bolts (1 … 7) initially…
- 15 Nm (11 lb-ft) — Tighten bolts (1 … 7) in diagonal sequence to
- 20 Nm (15 lb-ft) — Tighten base plates for support elements to
- 20 Nm (15 lb-ft) — Tighten base plates for support elements to
- 5 Nm (3.7 lb-ft) — Fit sump (bottom section) and tighten all bolts initially to
- 10 Nm (7.4 lb-ft) — Tighten bolts securing sump (bottom section) to
- 30 Nm (22 lb-ft) — Tighten with torque wrench to
- 60 Nm (44 lb-ft) — Tighten with torque wrench to
- 30 Nm (22 lb-ft) — Tighten bolts (1
- 20 Nm (15 lb-ft) — Tighten bolts (11
- 50 Nm (37 lb-ft) — Tighten bolts (1
- 30 Nm (22 lb-ft) — Tighten bolts (11
- 9 Nm (6.6 lb-ft) — Tighten bolts for sealing surfaces between cylinder block and retaining frame (shaded…
- 23 Nm (17 lb-ft) — Tighten bolt connections of clamps evenly to
- 23 Nm (17 lb-ft) — Tighten bolt connections for clamps (front) evenly to
- 23 Nm (17 lb-ft) — Tighten bolt connections for clamps (rear) evenly to
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | BNK |
| Capacity | 4163 cc |
| Idle speed | 650-750 rpm |
| Normal | 10.0 - 14.0 bar |
| Minimum | 9.0 bar |
| Differential limit between cylinders | 3.0 bar |
| Oil pressure | 2.0/2000 bar/rpm |
| Oil pressure | 3.5/3500 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | MPI Bosch Motronic |
| Number of cylinders | 8 |
| Firing order | 1-5-4-8-6-3-7-2 |
| Fuel pump pressure | 4.0 bar |
| Residual fuel pressure | 2.5 > bar/minutes |
Cooling system
| Cap pressure | 1.4 - 1.6 bar |
| Thermostat opens at | 87 °C |
| Thermostat fully open at | 102 °C |
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 70 torque figures.
- Removing and installing camshaft timing chains · 24 torque figures
- Detaching camshaft timing chains from camshafts · 18 torque figures
- Removing and installing all timing chain covers · 7 torque figures
- Removing and installing exhaust manifold (right-side) · 6 torque figures
- Aligning tailpipes · 7 torque figures
- Removing and installing exhaust manifold (left-side) · 4 torque figures
- Removing and installing drive chain for valve gear · 1 torque figures
- Removing and installing oil filter housing
- Removing and installing coolant pipe (left-side)
- Removing and installing front exhaust pipe (left-side) with catalytic converter
- Removing and installing front exhaust pipe (right-side) with catalytic converter
- Removing and installing fuel filter · 1 torque figures
- Checking injection quantity and spray pattern of injectors; checking for leaks · 1 torque figures
- Renewing engine control unit J623
- Removing and installing spur gear drive
- Checking fuel pump delivery rate - vehicles with 6-cylinder engine
- Removing and installing radiator cowl
- Checking fuel pressure regulator and residual pressure
- Removing and installing fuel pump control unit J538 - vehicles with FSI engine from 06.2004 onwards
- Checking fuel system diagnostic pump V144 - vehicles with 8-cylinder MPI engine
- Checking fuel system diagnostic pump V144 - vehicles with FSI engine
- Checking fuel pump delivery rate - vehicles with 4-cylinder TFSI engine
- Removing and installing fuel pump control unit J538 - vehicles with FSI engine
- Removing and installing chain for auxiliary drives · 1 torque figures
- Bleeding fuel system
Got a BNK problem? Ask for free.
Describe the symptoms — TorqFix replies with a diagnosis cited from verified workshop data.
Get free diagnosis →Who makes these pages, and how
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.