Removing and installing toothed belt approx. 06.99 > — AUDI
Removing and installing toothed belt approx. 06.99 > on Audi: factory workshop procedure for engines AEB, AJL, ANB, APU.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📐 46 workshop diagrams for AEB
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
AJL ANB APU
Special tools and workshop equipment required
Pin T40011
Removing
Engine in vehicle
Lock carrier in service position =>Page
13-1
.
Remove engine cover -arrows-.
Remove ribbed belt and tensioner for ribbed belt => Page
13-22
.
Secure pulley for viscous fan with a bolt M5 x 60 mm.
Remove pulley and viscous fan using an 8 mm Allen key.
Remove viscous fan from mounting.
Remove upper toothed belt guard.
Mark direction of rotation of belt with chalk or felt pen.
Position crankshaft on central bolt of toothed belt crankshaft into engine rotation direction to marking TDC cyl 1 -arrows-.
Unbolt vibration damper.
Unbolt toothed bottom belt guard -arrows-.
Turn toothed belt tensioner -1- with 8 mm Allen key slowly with constant pressure in direction of arrow until the bores -2- of piston and housing of the tensioning element are aligned.
In this position push pin T40011 in both bores.
Take off toothed belt.
Note:
Do not loosen bolt -3-.
Installing (adjusting valve timing)
Notes:
The position of the toothed belt must be set as described below, even after repairs in which the belt is only taken off the camshaft sprocket.
When turning the camshaft, the crankshaft must not be at TDC at any cylinder. Danger of damage valves/piston crown.
Align marking on camshaft sprocket with marking at cylinder head cover.
Place toothed belt on crankshaft sprocket (observe DOR).
Install toothed belt guard - lower part.
Secure vibration damper/belt pulley with one bolt (note fixing arrangement).
Set the crankshaft to TDC for cylinder No. 1.
Place toothed belt on tensioning roller and camshaft sprocket.
Using 8 mm hexagon key, turn toothed belt tensioning roller -1- in direction of arrow until pin T40011 can be pulled out of the tensioner.
Crank crankshaft at central bolt of the toothed belt crankshaft in direction of engine rotation twice and check whether the camshaft and crankshaft markings align with their respective reference points.
Install vibration damper/belt pulley.
Install toothed belt guard (top section).
Install viscous fan => Page
13-28
.
Install ribbed belt and tensioner for ribbed belt => Page
13-24
.
Install lock carrier =>Page
13-1
.
Tightening torques
Component · Nm
Toothed belt guard on bottom of / cylinder block · / / M6 · / / 10
M8 · 20
Vibration damper/belt pulley to crankshaft · /
Bolt strength rating · 8.8 · 10 + 90°1)2)
Bolt strength rating · 10.9 · 40
Ribbed belt tensioner to retainer · / 25
1)
Renew bolts
2)
90°corresponds to a quarter turn
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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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 20 Sep 2026.