In June of 2015 one Saturday I was preparing a load of branches in my backyard to take to our rubble site. The truck sat idling in the yard for 15-20 minutes. When I got in it to drive it away I noticed a funny smell. When I drove it over the curb and got into the street, I looked at the gauge cluster, and the temp had gone well into the red, so I pulled over and popped the hood. The coolant in the overflow bottle was boiling it was so hot, and the fan wasn't running. I bumped the connector for the thermostat switch and the fan came to life and the temp dropped quickly. That fan switch connector had been harvested from the engine harness in my 1991 Calais which I had parted out years before and the terminal must have spread so it made poor contact. I finished my dump run and when I got home, assessed the damage. The heat had split the radiator tank at the oil cooler fitting. Other than that the truck ran fine, so I just prayed that was the only thing wrong.