Hello folks, I'm seeking your opinions on this noise: https://instaud.io/3lvD I've had a thread going here, and it was suggested I'd get more visibility by posting in the engine forum. It only happens with a cold engine, and goes away (to my ears) within half a minute to a minute, so it is temperature related in some way. The noise has become a bit embarrassing. To me, it doesn't seem to change frequency with engine speed, and is particularly bad at around 1800rpm. I can hear it from the cab better than from top of the engine bay, where there are all sorts of other noises. I've slipped the aux belt off, and the noise remains. The local garage reckon it might be piston slap or a little end bearing failure, and the next step would be an engine tear-down, which would probably be as expensive as as engine replacement, even if I could simply replace it (JDM). Car has purportedly done 72k miles. Cheers.