On cold cold starts, a grinding noise comes from the engine bay, like an exhaust shield rattle or like if the starter solenoid didn't disengage fast enough. It just started recently. I thought it might be a weak battery but I cleaned the terminals and checked the water levels and they're fine. Haven't really got a good lead on where to start looking...
it doesn't affect driveability.. it's just a noise that wasn't there before.
