I have had an oil cooler with thermostat on my bike for a few months now and I recently noticed the oil cooler gets very warm before the oil temp even gets close to the opening temp of the thermostat (180 degrees). I have the oil lines to the engine and cooler connected to the correct sides but does it matter which line from the engine goes in to which fitting on the thermostat. It appears the thermostat is open all the time. It takes a while for the temp on the gage to start to register. I have the fairing mounted gage.