Re: Broken bolt on water pump housing

[Don]

Sorry, the pump will not seal with only two of the three screws in place, that broken screw stud has to come out.
Trying to drill out the little screw is a difficult task as well, the drill will surely want to walk away from the SS stud in favor of the soft aluminum. Might be worth seeing what a machine shop would charge to drill out that stud and install a helicoil.