[paulgrey]

Thanks Guys,

I currently have got a thermostat between the engine and the cooler, The Thermostat has a flow direction, hence my concern about the orientation on the pipes. The Idea of the thermostat is that at when the oil is cold oil flow to the cooler is stopped to get the oil up to temp quickly, once the oil hits temp the oil flows to the cooler to keep the oil at a stable operating temp. I also have an electric fan on the cooler to help. The operating temp is between 75C and 90C.