Quote:
|
Originally Posted by 68LSS1
Explain to me how atmospheric pressure has something to do with this
|
It's simply the difference in pressures. Ignoring the cap for a moment, greater pressure in the radiator = coolant flow to the tank. Inversely, greater pressure in the tank (yes, from atmospheric pressure, which is greater at sea level than at high elevations) = coolant flow to the radiator. If the vacuum explanation works better for you, go with that. As to your tire pressure analogy, the gauge reads the pressure relative to atmospheric pressure.
