How the heck do you get a freeze plug out? From what I've read it's like "just hit one side in and it'll pivot so you can grab the other side with pliers". Yeah right. So far I've pounded like three holes through the thing and the edges have not budged. I even found a little tiny pry bar and got it into a hole and pulled with all my might with about 8" of leverage. All I can do is slowly mutilate the boundaries of the existing holes. Any suggestions? I fairly frustrated wallowing in a puddle of filthy coolant and making no progress. Not to mention that my wife'll be pissed if the truck is immobile and taking up the whole garage.