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I will tell you that if the engien wants to run at say 190 niether stat will stop it. It will run the temp it wants to run if that temp is above the stat rating.



If I understand what you are saying, I disagree. So long as there is an adequate radiator and flow, the thermostat should keep the temperature below what the "engine wants". Kim

Well you are wrong. The stat CANNOT control the temperature above its rating. The stat is in the system to maintain a cooling temperature no lower than the rating and to help the engine reach that temperature sooner than teh enign e would reach it with full circulation but if your enfine wants to run 200 degrees it will - even if you have a 160 stat in it.