Reply to "Cannot get my Pantera to cool"

According to the 50/50 coolant chart, boiling point in a 16 pound system is 260 degrees F.

That's what I am using. Don't go higher.

With most of the current cars while in traffic, I get nervous at around 250 although few will show a numerical gauge. The vast majority will just show that the temp is reaching the maximum level of the "NORMAL" range. 250 is around the N where it says NORMAL.

I think the manufacturers got tired of answering questions about why their car was running hot and what's wrong with it so they took the numbers off of them.

220 is on the low end of normal operating temperatures.

235-240 is what I would like to see the maximum high be and should not be a problem at all if the system is healthy and operating correctly. This still gives a 20 degree safety factor for boiling over and is fine for me. That's for traffic and the temps should drop with the car in motion.

If someone is having boiling over issues at less than 260, simply put, the system is not holding pressure properly.

With just pure water the boiling point would be much lower. I'd have to check the chart to see what it would be exactly.