The engine will not get hot enough to evaporate condensation in your crankcase with the thermostat completely removed. On a race car, this isn't a problem due to the frequency of rebuilds. On a street car, this is bad.
I understand that by keeping something cooler longer the heat transfer is higher, BUT. If you have an aluminum head matched to an iron block I would think they would size/shape them so they would work together better at "normal" operating temperature. If you keep it below that range for alot longer and get on it. Wouldn't that cause a highly unbalanced heat distribution problem? In other words areas very very close too the cyl vs. parts of the head further away. Maybe my logic is a little skewed on that one. That’s the reason I’ve always heard no thermo is a bad idea. The aluminum head and iron block not "matching size" soon enough due to the different properties of each and problems with heat variance. All that putting more stress on the head gasket.[body]Engine stays cooler longer. This, as supported by elementary thermodynamics, keeps heat transfer up, which in turn minimizes the heat "stretch" properties (the rate of expansion of Al vs that of Fe) of an aluminum block vs an Iron block. Therefore, less possibility of head warpage and head gasket leaks.[/body]
What about in sub-zero temperatures? The engine begins heating up VERY fast, the aluminum head directly from the explosions and the iron manifold retains that heat WAY before the block can have any heat dissipated to it.[body]would think they would size/shape them so they would work together better at "normal" operating temperature. If you keep it below that range for alot longer and get on it. Wouldn't that cause a highly unbalanced heat distribution problem?[/body]
Your PCV system has no effect on condensation. Condensation occurs after the engine is shut off, not while it's running. 90 C is only 194 F, not hot enough to evaporate the water in your crankcase. Coolant temps on almost any gas automobile should be about 200-260 F. The reason why you need a thermostat is the same as why you need to change your oil more often if you only take short trips. You don't want water contaminating your oil. With only short trips, water in your crankcase doesn't have enough time to evaporate. Without a thermostat, it doesn't get hot enough no matter how long you drive it.Originally posted by Jed118
Trust me, it gets hot enough. I have an accurate temperatrue gauge that does not indicate in colors. it usually runs between 70-90 cels.
I have a very intricate blow through system with three independent cross-flowing sections as well as a very large blow by (5x the size of a puny PCV system) without an oil catch can.
I'm not worried about condensation.