Asked by David

How long would it take a car engine, say 500 pounds of iron, to cool from 1,200 degrees F (exauhst manifold temp) to air ambient temp. of 75 degrees F.
Answered by drwls
It will approach the air ambient temperature asymptotically. The time it takes for the temperature to get within a few degrees of ambient will depend upon the heat transfer rate as well as the mass of the engine. Is it being cooled by a radiator, forced convection or natural convection?