One of my buddies melted down an engine because his radiator got punctured and he ended up losing most of the water. The problem is, water temp looked normal because it was normal before there was no water left.. I want to put a water pressure switch in so that I have an idiot light turn on if I lose all the water. What is the best way of doing this? I was thinking buy a 4 PSI pressure switch (https://www.quickcar.com/4-psi-fuel-...switch-61-730/) , weld npt bung in radiator or thermostat housing, then wire the switch to the idiot light on the Water temp on the gauge cluster. Would this work?