04 6.0 F250 Powerstroke complete failure with no warning from ECM or Dash.

What is your question?

My 04 6.0 Powerstroke left me seriously stranded and the opinion of the diesel mechanic is that the EGR COOLER went out and melted all of my glow plugs which resulted in my head gaskets failing. It sounds possible but there were no check engine indicators or rough idleing or codes. There was some loss of power going up a steep grade and about 10 minutes after putting #2 in my tank I notice white smoke coming from my exhaust sporadically and the check gauge light popped on for a few seconds and turned off but the temp gauge was perfect. The mechanic said that there were no codes when he ran the diagnostics but when turning the key to the on position there was no activity (noise) under the hood indicating the system was prepping to start which would explain why the truck all of a sudden wouldn't start. Right as I pulled into the shop my temp gauge maxed out. Something just isn't adding up in my opinion but I know nothing about diesels. Before I left it was running.

What makes this problem better or worse?

It has always started right up and has been maintained religiously according to Carfax.

How long has your 2004 Ford F-250 Super Duty had this problem?

It literally took about 5 minutes from the first symptom to catastrophic failure(I have not confirmed a failure due to some parts that were removed and are laying in my back seat)