The carbon arises from the excessive heating of engine oil or from incomplete combustion.
The transporter had not been designed for use on planets with atmospheres and excessive frictional heating had to be avoided.
The excessive heating was causing the vaporization of the fuel in the power line of the engine.
That said, shading open surface waters can reduce excessive heating of habitat.
The explosive bunges - what might be the possibility of these firing due to excessive heating?
What might excessive heating do to all kinds of other hardware in the wheel well - the hydraulic fluid, uplocks, etc.?
These relate to excessive heating, frictional drag, shielding, and gravitational aberration.
Analysis showed inadequate thermal shielding of the sensor's radiometers due to excessive heating at perihelion.
Alternatively, the laser beam may be pulsed to decrease the amount of excessive heating.
That permits the welding to occur without excessive heating of the remainder of the sheet.