The thermostat won't stay closed. The thermostat will open when the stationary water in the engine reaches a certain temperature, allowing water to circulate through the system. When the engine temperature normalises, the thermostat may close a little or a lot to maintain a regulated temp. This is how it normally works. If the cooling is too efficient, that is the radiator is getting rid of ALL the heat, the maximum working temperature or the engine will be that of the radiator water. In other words the thermostat can only regulate what it has. If for some reason the water is too hot or too cold the thermostat can only regulate within that range.Originally Posted by Winnie
IMHO the OME design of radiator, thermostat and system is probably best for the vehicle unless you are running in extremes such as cold climate all the time or very hot climate all the time. Increasing the number of cores may result in better cooling of the water but will also decrease the ID of the galleries in the radiator. OK if you always use good coolant in your radiator. Unfortunately, we tend to take our vehicles out and fill the radiator externals with leaves and mud and wonder why they don't perform as well as they did. There is always the possibility that an emergency in the bush may cause you to have to top up or even fill with not so pure water instead of coolant. In this situation it may be best to have as large an ID in the galleries as possible.
Reply With Quote