[Walt Fricke]

Now you have me really confused. You used a ceramic coating on the valve covers to reduce engine heat on the lower and upper valves?

Are you saying that heat from outside the motor gets in to the valve spring/rocker arm area? Giant, glowing red turbos on each side right next to the valve covers?

Ceramic coatings certainly will reduce heat flow, keeping the hot side hotter, and the cold side colder. I am not seeing how this will help in this location, though. The oil starts out relatively cool, and after valve stems and springs and cam friction and whatnot heats it up, carries away some of that heat as it moves to the pump.