The Formula 1 Tech Talks had a discussion of heat dissipation in the cars. The interesting part was the limited space available between engine shape and aero requirements means that a lot of very hot parts are squeezed together.

I think this was the link...but not sure. They've covered the topic a number of times. The whole tech talk series is worth watching. They have a lot of visual demos of different design aspects of the cars. https://youtu.be/AC0eOfQl1d0