I have a crack in my basement wall and water is visible leaking through from the outside.
I want to know the proper procedure to fix this myself. What type of sealant do you recommend. I do believe you have to v out the crack before you plug it. Is this correct.

The best patch is done on the outside of the wall by digging down to the footing. A crack means movement so concrete patch is not your best bet. I'd patch with a tar sealer on the outside. If this is not possible then you can try to patch on the inside after cleaning out the crack. Products like this work best CONCRETE CRACK REPAIR, Repairing cracks in Concrete, Patch Concrete Cracks. - Lone Star Epoxies

Also might want to make sure your grades and gutters discharge water away from the perimeter of the house.

<p>Cracks that have never been repaired by others are the easiest ones to fix. These “untouched cracks” can be repaired using the <a href="http://www.basementselfsolve.com/basement-wall-crack-repair-kit/">Urethane Basement Wall Crack Repair Kit</a>. If you are concerned about getting a structural repair, the <a href="http://www.basementselfsolve.com/epoxy-injection-basement-wall-crack-repair-kit/">Epoxy Injection Basement Wall Crack Repair Kit</a> is recommended. If a crack has been “patched” with a removable caulking or even a hydraulic cement that was only put on the surface, it is best to remove as much of this material as possible. If the patch is tough to get off then try to remove just the area where the injection ports would go. This is typically every 8” up the wall. If the crack has been “v-out” and filled with a hydraulic cement or a material that is difficult to remove then the <a href="http://www.basementselfsolve.com/previously-repaired-basement-wall-crack-kit/">Previously Repaired Basement Wall Crack Repair Kit</a> is needed. Lastly, if a crack is always wet and leaking then the <a href="http://www.basementselfsolve.com/previously-repaired-basement-wall-crack-kit/">Previously Repaired Basement Wall Crack Repair Kit</a> is to be used as well. </p>
<ul><li>Basement wall crack measuring up to 10LF in length, 1/16” to 1/4” wide, and up to 4" deep: <a href=" deep: <a href=">Urethane Basement Wall Crack Repair Kit</a></li><br>
<li>Basement wall crack measuring up to 10LF in length, 1/16” to 1/4” wide, and up to 4" deep AND is in need of structural repair:<a href=" deep AND is in need of structural repair:<a href=">Epoxy Injection Basement Wall Crack Repair Kit</a></li><br>
<li>Previously repaired or constantly leaking wall crack measuring up to 10LF in length, 1/16” to 1/4” wide, and up to 4" deep:<a href=" deep:<a href=">Previously Repaired Basement Wall Crack Repair Kit</a></li><br><li>Water leaking through tie rods and snap ties (Tie rods and snap ties are the metal rods that run through your poured concrete foundation walls or any small void through a poured concrete foundation):<a href="http://www.basementselfsolve.com/tie-rod-and-snap-tie-kit/">Previously Repaired Basement Wall Crack Repair Kit</a></li><br><li>Water leaking through tie rods and snap ties (Tie rods and snap ties are the metal rods that run through your poured concrete foundation walls or any small void through a poured concrete foundation):<a href="http://www.basementselfsolve.com/sewer-pipe-seal-kit/">Tie Rod And Snap Tie Repair Kit</a></li><br><li>Water leaking through sewer, water and well pipe penetrations, and pvc conduit:<a href="http://www.basementselfsolve.com/bulkhead-repair-kit/">Bulkhead Repair Kit</a></li>

Sorry about that, I don't know what happened to that post! In sum, you could use one of two crack repair kits: (1) Urethane Wall Crack Repair Kit for walls that have been "untouched" or (2) an Epoxy Injection Kit for walls that are also in need of a structural repair. Once the crack has been fixed, you can consider sealer the basement with a wall and floor sealer.