Update
https://documentcloud.adobe.com/link...5-2e66475252bf

This is a link to download a short .mov movie file from my iPhone in a dark garage at work as engine is warming up. last part of video sound is oil fill cap being removed and then put back on. Sounds like timing chains/guides worn out and hopefully not an intermediate lever also.
Any advice is most appreciated. thanks

Need help please, and Thanks in advance. My 2007 FE83, E70 4.8i is at 154K miles, timing chains and guides at their maximum wear point (serious rattling when warmed up). Blue smoke from exhaust after long idle, Valve Stem Seals. I live in northern Virginia. . Should I replace engine with salvage yard version and fix the VSS and VCGs/Chains or fix original engine in the vehicle. Local shops not much interested either way. Any recommendations/referrals is most appreciated. Thanks.