I too have a crack in a poured basement wall on the north side. It is at most 1/8 inch. The crack runs for most of the wall but only really leaks on the bottom half of the crack. It had been patched with hydraulic cement, but that just slowed down the leak. People tell me there is some type of injection product a home handyman can apply. What is it and where might I get it?
I have already removed a lovely wooden deck above the affected area. Had a company brings in loads of dirt and regrade. That didn't stop the problem in the affected area.