Gruber
Senior Member
- First Name
- Mark
- Joined
- Jan 27, 2018
- Threads
- 2
- Messages
- 2,309
- Reaction score
- 1,522
- Location
- TN
- Vehicle(s)
- 2018 Honda Civic Sport Touring; 2009 Honda CR-V EX-L
As far as cooling is concerned, sodium in a car engine does exactly the same thing as water and oil. All these fluids only distribute heat and equalize the temperature by circulating in closed spaces between hotter and cooler engine/transission parts.... The sodium helps just conduct it. The oil and water remove the heat on a turbo, with the water doing the bulk of the work when off, since there's no oil flow at that point. Still, the heat sink is the oil/water running then water when off. The sodium for the valves isn't the heat sink (it's internal to the valve)... it just helps the heat transfer happen better because it allows head to transfer down the stem into a larger portion of the head. More effective surface area... better heat transfer.
But in the end, all cars are air-cooled. Only the air is really the heat sink that can reject the heat.
(Yes, submarines, in contrast to automobiles, are water cooled )
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