So today I was drove about 15 miles on the freeway in around 100-103 degree (Fahrenheit) weather. Going to my destination I had the AC running on full, but when I was about a mile away I turned it off as the needle on the car was approaching the danger zone. Coming home I had the AC off and the windows down, but the engine temperature still got rather close to the warning zone by the time I was home.
I understand the WD21's are getting significantly old by today's standards, but I'm just wondering if this can be avoided? I know 100 degrees is pretty hot, but typically I think the engine runs at 200-250 degrees, so the constant flow of air should be keeping it cool. The radiator was replaced within the last year, and the coolant has been topped off, so neither of those are the issue.
Any feedback would be greatly appreciated!