How do I fix a crack in concrete hollow blocks in the basement?

[Vermilion]

The thing is, I'm going to remove a partition wall that "might" support the outer wall in the basement. This outer wall has a small crack in it. I, of course, want the wall to have full strength, so I want to repair this crack and reinforce it as much as possible. The wall is made of concrete hollow blocks.

My idea was to use an angle grinder with a diamond blade to cut grooves in the joints, insert rebar, and then just fill in with mortar.

But now I'm wondering...
How long does the rebar need to be?
What type of mortar should surround the rebar?
How far into the wall should I get the rebar?
What diameter of rebar should I use?

 

[Kallebass]

Did you get any answers to your questions?
How did you do it?
Did it turn out well?
What brand/concrete/cement did you use?

 

[Spraggabenz]

Bumping this thread.
I've been thinking about repairing thin cracks inside my basement made of concrete hollow blocks, looks just like the pictures above.
Is it a good idea to saw and chip open the cracks, insert some rebar, and then fill in and level with some concrete mortar? Has anyone tried it?