Bottom bracket square taper (cartridge) extraction, too tight in one side I'm getting weird noises coming from the bottom bracket (BB from now on), and I wanted to extract it to check if the problem is there or not.

The guide video I used is no longer public (free) as when I saw it the first time.

I've been successful extracting on another bike, but on this one, I have two issues:


On the right side (drive side), made of metal, the extraction key
doesn't fit! the key seems to be about 2mm wider than the
circumference of the side, as seen on the picture below. I assume
something distorted this side, this bike fell once, but I doubt this
was damaged by that.
The left side is made of plastic, and my hope was (because of the
issue on the right side), to unscrew this side first, but it is very
tight and I am fearful of it breaking if I apply more strength. By
the way, the key fits perfectly on this side.


I've done this before on another BB and it came out just fine.

A picture to illustrate this:


Finally the question(s):

Is there a different technique to extract this BB?

Is there hope in salvaging this BB? it may not be the part making the noise.

Any guess on why the right side is tighter?
I think you'll find that they are actually a different size.  I'm struggling to find any information about it online but I can show you a picture of a tool that should deal with it.  It's hard to say what the difference in size is but there is an obvious difference in thickness of the ends.  You probably just need to find the other size tool and take out the metal end first.