NB arms pre-drilled from Factory?
#1
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Started to de-bush my NB arms for NB subframe swap and noticed that NB2 arms have pre-drilled factory center holes. I assume it was for rubber bushings to prevent twisting. I am unsure whether to fill the holes with brazing or a cap of some kind since I am doing delrin and need zerk fittings in different location.
#2
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Started to de-bush my NB arms for NB subframe swap and noticed that NB2 arms have pre-drilled factory center holes. I assume it was for rubber bushings to prevent twisting. I am unsure whether to fill the holes with brazing or a cap of some kind since I am doing delrin and need zerk fittings in different location.
Two-piece bushing = block extraneous holes since they’ll let grease leak before greasing the sleeve
The spots you’ve photographed use one-piece Delrin bushings, IIRC, so maybe don’t worry about it. But check your kit.
#4
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Drill the delrin small enough that you tap the bushing itself along with the arm bore wall.
Maybe file a longitudinal grease groove. Maybe spiral if you’re feeling particularly saucy.
Thread
Thread Starter
Forum
Replies
Last Post
hi_im_sean
Miata parts for sale/trade
14
12-01-2016 05:07 PM