Vehicle overheating

2005 Chrysler Pacifica. I had a similar problem, and I spent money, time, oodles of frustrations, stranded out in the middle of Gods great creation at 3 am, towing, all in the hottest time of the year. EeHHHH
and months later it was still overheating. I noticed the oddest thing there was this foam on my driveway at first, I thought it was mud it looked like mud. But nope. I wrench so I am not afraid of getting greasy, I crawled in it and then under it and what was occurring was not so easy to find considering the whole undercarriage was completely greased. O' BOY FUN! Long story short I had oil in my reserve tank (coolant) and yes, I know what I am talking about. It took only seconds before my engine was screaming hot and blowing hoses. I am attaching the video it was my "Eureka, moment" replacing an engine oil cooler, plus as you can probably tell I have the gift of gab, so this is easier. I live in California, it was summer, I was happy and determined but excessively hot from well wearing grubs and laying on hot concrete, with no shade to be found and. I have a little problem with my heart I am a little winded from the 115-degree weather. I am only posting this because this vehicle is oddly built, I feel your pain, it is frustrating, and it had seemed unrelenting I am just trying to help. Please excuse the "s**t" word. It is not used in a foul manner, more so a "God finally".