Duh! It doesn't have to be a compressible fluid! Given a fixed volume and an increase in temperature (yeah, the engine's running . . . ), you'd HAVE to have an increase in pressure . . . It's all coming back to me now . . . I'm having flashbacks to the days when I failed thermodynamics in college! Some days it just doesn't pay to get out of bed . . . Thanks Tim, for giving me back my perspective, Marc t wrote: > Marc Perdue wrote: > > > > This doesn't make sense to me. The cooling system in the Vanagons is a > > pressurized system. Unless the coolant is a compressible fluid such as > > freon, it seems to me that you'd HAVE to have SOME air in the system. > > > > What am I missing? > > > > Marc Perdue > > > > The expansion tank with a pressurized check valve. |
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