V2 Diff rebuild + Gear Ratio Swap

[maupineda]

I also wanted to refresh the fasteners but they are too many and changing them for new was expensive, so I got myself a small ultrasonic cleaner and run through in a bath of rust remover for the bad ones, and vinagre for the only dirty ones.

one note, the rust remover does take the zinc coating off, so I will put a coat of black oxide which should be good enough for some time as I don’t drive the car in the rain.

they came out pretty clean

[bigjae46]

I think it is over kill the replace those every time. I know BMW spec is to replace but my guess is it goes beyond the fastener wearing out. When BMW repairs a vehicle there is absolutely an expectation of appearance. Rusty or marred bolt heads are a no-go. And I think BMW wants to do everything within reason to avoid a repeat of the symptom. Customer satisfaction. Again, just my opinion.

[maupineda]

I think it is over kill the replace those every time. I know BMW spec is to replace but my guess is it goes beyond the fastener wearing out. When BMW repairs a vehicle there is absolutely an expectation of appearance. Rusty or marred bolt heads are a no-go. And I think BMW wants to do everything within reason to avoid a repeat of the symptom. Customer satisfaction. Again, just my opinion.

100% agree, in my case is just to maintain it rust free so in year to come I don't struggle to remove seized bolts. if left as shown above, they are raw, and would rust by just touching them LOL, I will post a pic of how they look with black oxide.