Hi everyone, brand new member here hoping for advice. 2003 A4 Quattro 3.0 V6 6-speed.
In short, the belt continues to come off and I can't figure out why.
A few days ago the serpentine belt (drive belt, power-v belt...) slipped off the pulleys while my wife was driving. I got a new belt (Dayco) and installed it. Started the car, and the new belt slipped off. So then I bought a new tensioner assembly from Audi, and installed that (which was quite a chore, involving removal of front bumper, repositioning of radiator panel, etc.). After all that, the belt still came off after I revved the engine (although it stayed in place at idle).
I would much appreciate any ideas as to what I should investigate next. Thanks.