I doubt it's anything serious like that as you would notice other symptoms the same as a blown HG such as losing coolant "Mayonnaise" etc, I had the very problem in that thread myself.

I would check the ignition system, leads, plugs etc and battery are in good condition, does it turn over as normal? A cold engine is much harder to start then a running temp one and so the electrical system needs to be in good order.

Martin