What could be causing this? Razor cut along belt at one section or two??? Inspected this new belt during turbo install and found zero contact points anywhere.
Damaged pulley? Try inspecting with the belt off?
Damaged pulley? Try inspecting with the belt off?
It may well be defect...that is not an oe BMW Continental belt...that is an oem Continental belt. I will get an actual OE BMW belt tomorrow to replace.You said again. Was last failure identical? I'll be specific - there is no sign of damage to the outside of that belt, so it is not a backside pulley burr that is causing that. That belt is woven. If it is identical = pulley issue. If it is not, looks like a belt failure (defect). That looks like a failing belt - not wear. Good luck and let us know what you figure out.
Filippo
If you've got a bend or wobble in the pulley it could be pushing into the side of it causing it to pancake in from the side.
Take a look of your Power steering pump bolt. I had the same issue it was one of the bolt who was unscrewed.
The belt was perfectly aligned with engine off but the pump was wobbling with running engine.
Do you had a serious inspection after the broken serpentine belt ? I can turn in a dramatic issue.
Take a look here https://www.e90post.com/forums/showthread.php?t=1305990
FWIW I replaced my belt and tensioner once, and found unusual wear on one of the new wheels after a short while. Out of fear, I replaced both once more. That was when I discovered the belt was slightly shorter than the original one. Maybe an inch or so. Now Im back to stock length and no issues.
The location of the damage site on the inside looks a little "soft and fuzzy" like it's been beaten more than the rest. But not to the point of tearing or anything obvious...you have to look carefully to see there is a slight fuzz.Good catch. Looks like it. Curiously what does the inside of the belt look like, where the failure occurred?
Filippo
Makes you wonder how many cars drive around with tons of issues that less OCD people just have no clue exist