We know the water in your engine is regulated to 180 degrees but could
easily be regulated to 212 degrees especially if the water flowed
through a jacket in the manifolds. Why not use the wasted heat energy
for a steam motor to supplement the gasoline or diesel engine similar to
the way electrics assist the gasoline engine. We know Stanley steamers
were very efficient and powerful. Utilizing the heat waste from an ICE
would increase the engine's efficiency greatly. Don't knock it unless
you built a working model and it failed.