RE: Truck running cold, coolant question
I would think that diluted coolant would run cooler. Water boils at 212 degrees, antifreeze raises that to 270+. The lower the concentration, the lower the boiling point. It takes something like 540 Kcals to transform liquid to stream which takes energy in the form of heat out of the system. While our system isn't reaching 212*, some amount of water is super-energized at a lower temperature and this is why you start to see steam from a kettle before it actually boils. Under pressure this further raises the boiling point. But water jackets tha touch heavily heated areas will still absorb a lot of energy.
My question is better suited by knowing this. What retains heat better, Water or Ethylene Glycol?
Turkeyhunter, you may be right about the T stat, I never did check the original and might have just gotten lucky. I might have blown some chunks out of my radiator when I flushed it and am getting better cooling than I'm used to. Or maybe the new water pump is more efficient?