Sounds like you have dirty chain tensioners.. or dirty lifters... The death rattle doesn't last long.. If you hear it more than once or twice before the scattering begins, you are lucky..
This one was taken apart today.. as I type this the second IMS failed engine is being extracted from the car... It'll be apart tomorrow..
Seen my balls lately??
The New Year has started with a Tick.. Tick.. BOOM! Each day this week we have removed at least one engine and completely disassembled it after a catastrophic failure!