OK it's possible my search fu sucks hard.
but
today - new sound to my G8 Gt. Start up with remote - cold out side 29 degrees - yes car sat outside. starts and as the engine catches there was a loud screech that also stopped quickly. then engine just idled fine - no extra noises that I could tell.
worried me enough I turned it off - then restarted via remote again. quick smooth start - no noises - idled away fine.
drove to work - no issue even gunned it a few time - on cold tires but meh - engine pulled as hard as always, no extra noise I could fathom. seem to be fine.
restarted at work after parking - again - no issues.
worried that this evenings next cold start might pose a noise again. Car is at 122K on the clock - is due for an oil change, but otherwise has been trouble free.
I'm worried by reports of lifter noise, lifters locking - worn cams etc etc - but would think that would present as constant issue. Honestly I thought it sounded like a bad starter gear