Fluid systems - damage models?

[Untamo]

I have no extensive experience about these in other aircraft so I can't say anything about them, but this is the case for the 109... in all versions of IL-2.

In it, the thin smoke isn't a reason for panic and quick RTB as is the case for the medium smoking which will start to decrease your engine power quite quickly.
The heavy smoking has a umm... 80% chance of fire within less than 30s and it always ends in an explosion just a couple of secs after catching fire.