Timing belt replacement: Audi 2.5 TDI (ACV, AFB, AHY, AJT, …)
Step-by-step timing belt replacement for the Audi 2.5 TDI: 22 steps, 5 torque figures. What to remove, what to tighten and to how many Nm, what to check.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)
Don't miss
- Do NOT loosen nut (2) for injection pump sprocket. Otherwise this would alter the basic setting of the injection pump. The setting cannot be re-adjusted with workshop equipment.
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 10 Nm (7.4 lb-ft) | Tighten securing bolts |
| 20 Nm (15 lb-ft) | Tighten securing nut (2) |
| 20 Nm (15 lb-ft) | Tightening torque |
| 25 Nm (18 lb-ft) | Tighten securing bolts for lock carrier plate (2) |
| 36 Nm (27 lb-ft) | Tightening torque |
ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.
📋 Procedure
- Start engine.
- Read measured value block "“function 08”" display group 07.
- Check readout in display zone 4 (coolant temperature).
- Start basic setting "“function 04”", Display group 04, engine running at idling speed.
- Check display in display zone 4.
- Observe display in display zone 2.
- Check display in display zone 3.
- Switch off ignition.
- Remove engine cover panel .
- Remove toothed belt covers (front left and right).
- Check toothed belt tension.
- Tension toothed belt.
- Slacken nut on belt tensioner using special tool.
- Turn Allen key anti-clockwise until markings (1) are in line, then tighten nut.
- Tightening torque: 36 Nm — 36 Nm (27 lb-ft)
- Slacken camshaft sprocket securing bolts (1).
- Apply ring spanner (22 mm) to pump shaft and turn slightly: [Note: Do NOT loosen nut (2) for injection pump sprocket. Otherwise this would alter the basic setting of the injection pump. The setting cannot be re-adjusted with workshop equipment.]
- Re-tighten camshaft sprocket securing bolts (1).
- Tightening torque: 20 Nm — 20 Nm (15 lb-ft)
- Check commencement of injection again and compare with the specification .
- Correct setting at injection pump sprocket (re-position toothed belt).
- Install toothed belt cover.
Other AUDI procedures
- Removing and installing parts of the lubrication system
- Renewing valve stem seals
- Checking air mass meter – Audi 2.5 TDI
- Checking cruise control system (CCS) – Audi 2.5 TDI
- Checking modulating piston movement sender and quantity adjuster
- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 torque figures
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.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.