A cobbled up repair by the previous owner was the culprit.
The intake gasket was cracked on the #4 cyl, and repaired with silicone. The silicone melted away, causing the problem.
As to warming it up in the driveway, it's not the ice outside the car that is the problem. I want my glass frost free when I am driving, and this time of year here in the great Adirondack mountains that means warm it up before you go.
Thanx folks.