Fuji Abound said:
If you are able to show me bubbles of pistons rising through denser, cooler cylinder heads then I will believe that metals can heat via convection!
Fly-by-wife
Exactly - I am afraid our friend Mr Guppy has always had a rather umm, colourful imagination.
There is oil in the sump, the bottom of the sump gets heated and this heats up the oil contained in it. The oil then helps to heat the rest of the engine using convection.....does it not?