Sorry to hear about your problem. Getting bolts out depend on several things. They range from access to the bolt to the ability to put heat on the area with nothing being damaged. If you can drill out the bolt, then I think this is a way to go about it. It is good to have either a small angle grinder or a Dremel type tool for easier access. First, file/grind the top of the bolt/stud flat. Then center punch the top dead on center making a deep punch so that your drill bit will not wander about. Using a extractor takes patience. If you can apply some heat using a torch around the immediate area then this will help . If so heat the area around the bolt, making sure to get everything out of the way so nothing catches fire.Do not heat the bolt itself. What I do is heat and then use some WD -40. I have not had good luck with PB. Do this several times, so the WD can get into the threads and the heat will expand the area around the bolt.Then try using the extractor. It should come out. If not and if you can drill the thing out, then you may end up just drilling and re-tapping the hole to a slightly bigger bolt size. This may require you drilling the hole in the water pump the same size.If you are keeping the car make sure to use some Permatex thread compound on every bolt. Threads should be oiled at minimum to get the right torque reading unless you are using thread locker. One last thing, before you do anything, tap the end of the bolt with a small all peen hammer with a nice direct hit. Not to hard but steady and firm. Do this several times. If you can do this when you use the extractor then do so. This helps. Next time you experience a bolt that will not cooperate tap the end of the bolt /wrench with a hammer as you twist. I have found this will help tremendously helpful with stubborn bolts/studs. Good luck Paul