Personally (for another opinion here) I would not suggest Failsafe. If the engine overheats even one time, that thermostat is forever stuck in the open position. Unless you take it out and physically remove the two locking tabs. Or I have removed those tabs before putting one in. If the thermostat gets stuck in the open position, it is like not having a thermostat at all, and I don't like that option. Most thermostats sold today have a jiggle hole or bleed valve. Before you purchase one, look to see if it does in the product details.
