By the looks of your vid you have a V8 do you have 4.4-4.6 or 4.8?

That's does sound like the timing chains guides are broken. I had the same thing on my 02 4.4. Don't run the engine anymore, if the chain jumps a tooth the pistons will hit the valves and the engine wont be re-buildable.

Don't do this job yourself only the most experienced tech should do this. Doing the vanos, the variable cam takes the most experienced tech to remove and disassemble correctly with special tools to get the chain on and off. There is a vid on you tube someone with a 5 series did and they outlined some of the repair.

You should ask around on this board and find out if anyone here had it done in your area. The repair cost is something like $6,000 to $8,000 at independent shops...dealers want $12k You don't need a new timing chain, just the guides, they break due to age and not mileage. You have to disassemble the entire front of the engine and remove the oil pan.

If you have a 4.4 I would do the valve cover gaskets and the valley pan gasket and tube. The valley pans all leak antifreeze at the rear of the manifold. All 3 are very common for the 4.4 and I had them done.

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