Installation was easy but that is due to the engine design not this product. On day 9 the radiator fan was running 100%, which has never happened in six years of car ownership. On day 10, the coolant temperature fluctuated between 250F and 212F. On day 11 he was working at a solid 250F. The standard operating temperature for my car in Oregon prior to installing this thermostat was 205 to 220 F, depending on the time of year and vehicle load, and never went above 220 F. And for the price theβ¦