Didn't over heat for long, as soon as I noticed the steam, pulled over onto hard should and stop the engine. Maybe 30-60 secs max .
I have changed the head for an old one and still rattles, new water pump, new thermostat, new belts and new alternator.
Rattle sounds like top end towards the front of the engine, it sound like rattling tappets due to lack of oil.
If I had hair I would be pulling it out