For some reason my car hates heat!

For the first 90,000 miles of it's life it was happy in the cold and the heat. No AC, 7 blade fan, 22" rad, no shroud and no overflow bottle because it never over heated. The block was boiled, the heads were boiled and the rad was rebuilt with an OEM core. The water pump, thermostat and rad cap are all new. It should be it's old self, but it's not.

Last night I was driving here and there in 30+ C ( about 86F ) and the temp slowly rose to about 230F and steam started to fill the engine...

For some reason my car hates heat!
Author: Fury440