Mena, are you still gonna do a fan modification? It appears as if in your photos, that the sleeve bearing lubricant has exited the vehicle and centrifugal force has spread it onto the blades
I think if I were to do the fan mod again, I would do the external fan but make it a 80MM fan instead of 60mm.
Like this one which still draws less than your original, if the 0.19a spec can be believed. My original fan draws 0.03a more than the spec on the sticker.
Noctua 80mm fanBut Supposing that 0.19 amps is the limit the circuit board can provide to power the fan, and since noise is not a factor for you, perhaps a higher CFM fan would keep the internals even happier. You could step upto a 92 or even a 120MM fan if you were so inclined to cut such a diameter hole in the case, and get significantly more airflow without risk of overloading the circuit board's fan power.
This 120mm Noctua fan only draws 0.05 amps and Moves 53 cfm:
Noctua NF-f12And this "industrial" model is a bit stronger in flow and is dust and water resistant:
Noctua industrial fanBut if we maxing out airflow and the 0.19a "limit" is the goal and no concern for noise then the options become even wider, but apparently there Anything over 80cfm is going to require ~0.4 amps
That noctua NF-f12 is what I put on my fridge condenser, pushing air instead of pulling it through the condenser, and fridge performance increased over the original fan which drew more than twice the electricity.
I am considering reversing the flow of my 80Mm fan to blow air into the case. When aiming my IR gun through the fan opening, something directly below the fan was significantly hotter than everything else I measured and would likely benefit from a stronger directed airflow right onto it.
I think the vents in the case itself will only support so much airflow no matter what size/ strength fan is used, but then out comes the drill :)
