ACG overhaul
Hi, all.
As my NSX is 16 years old with over 127K miles, I wanted to overhaul my ACG.
About 30 years ago, there was a kind of general consensus in Japan that ACG should be replaced with rebuilt one after 60K miles but since then, the durability and the mechanical design of ACG improved a lot and thus, my ACG survived such a long time/distance.
I checked my ACG about 2 years ago or 11K miles before and the internal brush was still fine for another 1.6mm.
I don’t think it is required to replace all of the parts that I used this time but being as an electronics engineer, I wanted to investigate and replace as much parts as possible. The used ones will be kept as emergency spares any way.
The parts replaced with new one;
Brush
Regulator
Front & Rear bearing
Rectifier
Although there was no noise while the engine was running, I found that the rear bearing was already rattling quite a lot so it was good to overhaul it this time.
The brush was almost the same as 2 years ago so still can be re-used but replaced it with new one any way.
Rectifier was also still fine but since it's diode, who knows when it will fail with the excessive heat and vibration so decided to replace it.
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