After hanging around at the diesel shop for a few hours they informed me that the problem was a factory machining defect in the head which resulted in a crack. Wonderful, cracked head. They have to replace the head on the engine and the truck won't be ready until tomorrow afternoon. It just couldn't be something quick and simple.
Since I have to hang around until tomorrow anyway I went ahead and made an appointment for the two week follow up visit with the witch doctor which I hope will result in my being released back to full, unrestricted duty.
So I am now in the hotel again. I see the witch doctor tomorrow morning at 10:45 and with any luck my truck will be ready shortly after that. Ah well, as much as it's raining I'd rather be sitting in a nice warm, comfy hotel room than getting soaked to the skin chaining down a load. There's always a bright side.