Timing belt replacement: Audi 100 1991 5cyl Turbo 2.2 (3B, AAN, RR)
Step-by-step timing belt replacement for the Audi 100 1991 5cyl Turbo 2.2: 38 steps. What to remove, in what order, and what to check after.
Timing belt replacement on the five-cylinder 20V turbo engines (3B, AAN, RR) in the Audi 100 from 1991 and the S4/S6 2.2 is mostly about access and marks. The radiator is unbolted and pulled forwards to make room, the upper cover comes off, and the timing marks are checked before anything is disturbed. The crankshaft is locked with the special tool, the crankshaft pulley and lower cover are removed, and the belt comes off with the crankshaft gearwheel. A new belt is always fitted after removal. It goes on over the tensioner and camshaft gearwheel with the marks aligned, the tension is set by how far the belt can be twisted, and the marks are checked again before the covers and radiator go back.
🧭 Before you start
Unbolt the radiator and pull it forwards, remove the upper timing cover and check the timing marks. Lock the crankshaft, remove the pulley, lower cover, belt and crankshaft gearwheel. Fit a new belt onto the tensioner and camshaft gearwheel with all marks aligned, set the tension by the belt twist test, and recheck the marks before refitting.
Fits: platform codes 2.3, 20V, TURBO, |, S4, /, S6, 2.2
- Timing position: the crankshaft or camshaft is set and locked during this job
Don't miss
- Check the timing marks before removing the belt and again after fitting.
- Always fit a new timing belt once the old one has been removed.
- Lock the crankshaft with the special tool when loosening the pulley.
- Set tension using the specified belt twist, not by feel.
Written for this job from the workshop steps below · TorqFix editorial.
📋 Procedure
- Check the timing marks before timing belt removal
- Crankshaft pulley (without special tool):
- Always fit a new timing belt after removal
- Unscrew the radiator and pull it forwards
- Check the timing marks again
- Fit the timing belt onto the tensioner and camshaft gearwheel
- Align the timing marks
- Remove the timing belt upper cover
- The tension is set if the belt can be twisted by:
- Remove the timing belt lower cover
- Remove the timing belt and crankshaft gearwheel
- Use a special tool to lock the crankshaft
Other AUDI procedures
- Draining off and topping up coolant
- Checking injection quantity, leak tightness and spray pattern of injectors
- Checking coolant temperature sender -G62
- Checking idling stabilisation valve -N71
- Checking altitude sender -F96 – Audi 2.2 AAN
- 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.