so to follow up. the caliper is installed.
I did not use any Loctite attaching the brake line (soft). lets see if it seeps.
I got he motive power bleeder as well i used quite a bit of fluid (I had a gallon of BMW fluid). car stops but the pedal is going almost to he floor.
my ideas:
the master cylinder has a pocket of fluid? How to bleed?
the ABS/DSC has a pocket of air. I have downloaded INSTA but unable to get it to connect.
I have this cable:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
and
https://www.amazon.com/Taotao-FT232R.../dp/B07L498NGZ
Also have version 4.20 of insta but no cigar connecting to the car to do the ABS service thing/bleeding sequence
I had software to code the X3 and used it in an old laptop but it is long gone..