Torque spec for the S13 front bearing from the FSM is 150-175 ft-lbs. I've been using 180. I *think* it's ok to split apart the front bearings, but am not 100% certain at this point. The inner pieces are just held in place by the tabs on the inside of the plastic bearing cages and I don't see how popping out the inner piece could hurt things. I won't know more until I put a re-packed bearing into a different hub.

I think using hubs off used cars is fine and I plan on getting a couple more to keep as spares.

I'm definitely surprised you haven't seen issues Earl. I'd check the wheels periodically and if you get any play replace the bearings immediately.

David