I have a 2006 530i that is completely stock with 330k miles on it. Its always ran perfect but i have had a bad oil leak from the oil pan gasket. I pulled it out today and found a lot of garbage in the oil pan. There was a lot of rubber strands with what looked like metal strands in it. It reminded me of a serpentine belt shredded. It was also sucked up in the oil pickup tube. I used my finger to clean out the pickup tube and 3 torx heads were also in there. I am surprised i even had oil pressure. Some of the rubber strands were still woven into the oil pump chain that i had to clean out. Some of the rubber is very pliable and seems like gasket material but most of it has the metal strands in it. Does anyone know what or where this would come from? I was thinking maybe timing chain guides I had done the valve cover about a month ago and the upper timing chain guides all looked good. Plus i thought they are all plastic with no rubber but ive never taken one out. Looking from the bottom up into the timing chain area everything looks to be good. Anyone ever seen anything like this? I included some pictures for reference. The pic with the 3 torx heads and rubber pieces was everything that was sucked into the pickup screen.
edit- just saw a post where the serpentine belt can be sucked into the oil pan. I did have one go that shredded a month ago so that’s possibly what it is. Now I need to figure out where the torx heads came from.

 

Yep that's a classic. The belt issue I've seen before but not the bolt heads. Maybe someone whose seen it before will chime in. I would think you should be having some type of issue or noise with 3 screw heads missing.

 

Thinking about it now… in the last 2 weeks or so I’ll be sitting at a stop light and it will be idling fine and then stumble hard a few times but smooths back out. Thinking that might be the belt recirculating through a cam gear and causing missed time?

 

Shredded belt for sure.
Torx heads are probably from something timing related.

 

Torx heads are from something timing related.

 

From the picture the torx heads appear to be from the windage tray. Look closely at the tray covering the crank and I bet you find the sheared remains of the bolts still in the block. I'm surprised the engine is running at all. For that much of the drive belt to make it through the main bearing and front main seal the bearing has to have suffered significant damage.. .