Checking semi-automatic tensioning roller for toothed belt — AUDI
Checking semi-automatic tensioning roller for toothed belt on Audi: 11 steps, engines ALZ, AVU, BFQ, BGU.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A4 B6/B7 (8E)
- Timing position: the crankshaft or camshaft is set and locked during this job
Don't miss
- At the same time the marking on front of camshaft sprocket must align with the marking on the rear toothed belt cover (arrows). If necessary, turn crankshaft one turn further.
- Check the position of notch and pointer on tensioning roller using a mirror.
📋 Procedure
- Lift off engine cover (arrows).
- If fitted, detach cover (1) on right of engine compartment.
- Disengage solenoid valve 1 for activated charcoal filter system N80(item 1) at air duct.
- Unscrew bolts (arrows).
- Remove air duct (2).
- Turn quick-release fastener (item 1) 90° anti-clockwise.
- Raise retaining tabs (arrows) and detach upper toothed belt cover.
- ⚠ The engine must only be turned at the crankshaft, in the direction of normal engine rotation (clockwise). — Turn crankshaft at central bolt of crankshaft toothed belt sprocket in direction of engine rotation to TDC mark for No. 1 cylinder (arrows).
- At the same time the marking on front of camshaft sprocket must align with the marking on the rear toothed belt cover (arrows). If necessary, turn crankshaft one turn further.
- Push in toothed belt with firm thumb pressure.
- Release thumb pressure on toothed belt. [Note: Check the position of notch and pointer on tensioning roller using a mirror.]
Other AUDI procedures
- Exhaust manifold, front exhaust pipe and catalyst with attachments
- Testing clutch pedal switch -F36
- Testing idling speed
- Removing and installing fuel tank with its attachments and fuel filter
- Testing air conditioner compressor shut-off
- 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.