Coolant flow

George Jets said

Heat travels to lesser heat.

Try standing outside on a 10° day. The 98.6° heat in your body will easily move to the outside air temp of 10° (F).

Now try standing Outside on a 90° day. Any body heat over your 98.6° body temp is going to have a hard time excaping from your body.

This is a overheating situation, same applies to cars.....

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Yes, that is true. Energy always moves across a gradient to the body with less energy. If it’s hotter than 98.6° out, you’re not shedding energy, you’re absorbing it. But the rate of exchange is the issue here.

The rate of exchange difference between a coolant temperature 180° and 200° is pretty darn small. And in this case all we’re really talking about is the difference in the exchange rate between those temperatures. That also gets into how fast water is traveling through the system. As long as there is a difference in the temperature of the coolant and the temperature of block the coolant will absorb energy, that goes back to the first article posted in this thread in dispelling the “time in the radiator” myth.

Bottom line is that the cooling systems for these cars should be able to maintain a coolant temperature of 200°. Mine does. If the coolant temperature has to be 160° for the car not to overheat, the cooling system is not up to par.