Is it safe to put an egg on the radiator of a car as a sealant?
NO! – I presume you mean in the radiator – it is a myth that an egg will seal a leaking radiator – it comes from WW2 when American and British troops would put eggs in the rads of their jeeps and tanks to seal leaks – it worked then because the rads were similar to the home heating rad with big 1/2″ pipes and slow big bore water pumps. Modern vehicles have tiny rectangular section pipes running through the rad, high pressure small bore pumps, thermostats, heat sensors, expansion tanks etc. – put an egg in that and say goodbye to your cooling system – It would be the most expensive poached egg you ever have!
