Posted by Bob on April 29, 2018 at 08:07:15 from (64.255.159.199):
In Reply to: Cooling Systems posted by Sprint 6 on April 29, 2018 at 06:24:13:
"The pressure exerted on the coolant by the sealing of the system also controls the coolant from expanding as much as it would at atmospheric pressure."
Unless the system is at the atmospheric boiling point of the coolant at the time the cap is removed, you are trying to apply the "Ideal Gas Law" to a liquid, IMHO.
Below that temperature I don't believe there'd be enough change in volume of a non compressible liquid to explain the change in coolant level.
I'm sure the hoses expand and contract some with the change of pressure and there's probably some pockets of air trapped in the system that expand with the release of pressure.
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