A6 Sedan V6-2.8L (AHA) (1998)
- Using 8 mm hex wrench, turn toothed belt tensioning roller -1- counter-clockwise, opposite direction shown (arrow), until tensioning lever -2-
compresses tensioner -3- so that spring clamp (2 mm dia) can be removed and then remove clamp.
Before starting engine, pre-load timing tensioning roller as follows:
Using a torque wrench with 8 mm hex bit, apply tension to toothed belt clockwise in direction shown (arrow) until a torque of 15 Nm is attained.
This ensures tensioner has expanded completely and is properly engaging toothed belt.