A8L V8-4.2L (BFM) (2004)
Timing Belt: Procedures
Ribbed Belt, Checking, 6.0L MPI and 5.2 FSI
Check guide rollers and tensioner rollers and replace if necessary.
Check ribbed belt - 1 - for:
‹› Sub-surface cracks (cracks, core ruptures, cross sectional breaks)
‹› Separation (cover layer, belt cords)
‹› Breaks at lower layer
‹› Fraying of cords
‹› Wear at flanks (material wear, frayed flanks, hardening or glazing of flanks, surface cracks)
‹› Oil or grease contamination
‹› Replace the belt if any damage is found. By replacing, failures and/or disturbances can be avoided. The replacement of a ribbed belt is a repair
measure